Selected academic publications

Defects in photorefractive materials and their investigations. B. Briat, V. G. Grachev, G. I. Malovichko, O. F. Schirmer, M.Wöhlecke. Chapter in the bookSpringer Series in Optical Sciences: Photorefractive Materials and Applications”, ed. by P.Gunter and J.-P.Huignard. Volume II. (Accepted in July, 2004, it will be presented at CLEO meeting in May 2005).

1.   ENDOR study of Cr3+ centers substituting for lithium in lithium niobate. G.Malovichko, V.Grachev, A.Hofstaetter, E.Kokanyan, A.Scharmann, O.Schirmer. Physical Review, B65, 224116 (2002).

2.        EPR, ENDOR, and optical absorption study of Cr3+ centers substituting for niobium in Li-rich lithium niobate crystals. V.Grachev, G.Malovichko.- Physical Review, B62, 7779-7790 (2000).

3.        EPR, NMR and ENDOR study of intrinsic and extrinsic defects in regularly ordered and disordered Lithium Niobate crystals. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan, O.F.Schirmer. Ferroelectrics, 239, 357-366 (2000).

4.        Electrooptical properties in Fe-doped LiNbO3 crystals as function of composition. K.Chah, M.Aillerie, M.D.Fontana, G.Malovichko. Optics Communications, 176, 261-265 (2000).

5.        Axial and low-symmetry centers of trivalent impurities in lithium niobate. Chromium in congruent and stoichiometric crystals. G.Malovichko, V.Grachev, E.Kokanyan, O.Schirmer.- Physical Review, B59, 9113-9125 (1999).

6.        Interrelation of intrinsic and extrinsic defects – congruent, stoichiometric, and regularly ordered lithium niobate. G.Malovichko, V.Grachev, O.Schirmer.- Appl. Phys. B 68, 785-793 (1999).

7.        Nonstoichiometry as a powerful tool for photorefractive material optimization. Lithium Niobate Crystals. G.Malovichko. Proc. of the 7-th Top.Meet. on Photorefractive Materials, Effects and Devices, Denmark, June 27-30 1999, OSA TOPS, 27, 59-66 (1999).

8.        Electro-optic properties in undoped and Cr-doped LiNbO3 crystals.- K.Chah, M.D.Fontana, M.Aillerie, P.Bourson, G.Malovichko.- Applied Phys. B 67, 65-71 (1998).

9.        High resolution electron microscopy investigation of correlated defects in non-stoichiometric lithium niobate. Ch.Leroux, G.Malovichko, G.Nihoul, V.Grachev, C.Boulesteix.- J. Phys. Chem. Solids, v. 59, No 3, pp.311-319 (1998).

10.        Lattice constants of K and Mg doped LiNbO3. Comparison with nonstoichiometric crystals. G.Malovichko, O.Cerclier, J.Estienne, V.Grachev, E.Kokanyan, C.Boulesteix.- J. Phys. Chem. Solids, v. 56, pp.1285-1289 (1995).

11.    Characterization of stoichiometric lithium niobate grown from melts containing K2O. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan, O.F.Schirmer, K.Betzler, B.Gather, F.Jermann, S.Klauer, U.Schlarb, M.Wöhlecke.- Appl. Phys., v. A56, 103-108 (1993).

12.    Improvement of LiNbO3 microstructure by crystal growth with potassium. G.I.Malovichko, V.G.Grachev, L.P.Yurchenko, V.Ya.Proshko, E.P.Kokanyan, V.T.Gabrielyan.- Phys. Stat. Sol. (a), v. 133, No 1, p. K29-K33 (1992).

Selected invited talks at the international conferences for the last years

1.    Multifrequency spectroscopy of defects in complex oxides. G. Malovichko, V. Grachev, O. Schirmer. International Conference on Defects in Insulating Materials (ICDIM), Riga, Latvia, July 12-16, 2004.

2.       EPR study of ferroelectric and ferroelastic phase transitions in lithium niobate and lithium tantalate. G. Malovichko, V.Grachev.Fundamental Physics of Ferroelectrics 2004. Williamsburg, USA, February 8 - 11 (2004).

3.      Spectroscopic Study of Interrelations of Extrinsic and Intrinsic Defects in Lithium Niobate. G.Malovichko, V.Grachev. Photorefractive Workshop, Florida, USA, June 9-10, 2003.

4.      Comparison of the EPR and ENDOR data of LiNbO3:Fe, LiTaO3:Fe and KTaO3:Fe. V.Grachev, G.Malovichko, O.Schirmer. Photorefractive Workshop, Florida, USA, June 9-10, 2003.

5.      EPR, ENDOR, NMR and optical study of materials for optical telecommunication. V.Grachev, G. Malovichko. International scientific - practical Conference "Spectroscopy in special application", Kyiv, Ukraine, June, 18 - 21 (2003).

6.  Evolution of conception of intrinsic and extrinsic defects in lithium niobate. G. Malovichko – Fourth Annual Meeting of the COST P2 Meeting “Application of nonlinear optical phenomena” and Workshop on LiNbO3, 16-19 May 2001, Budapest, Hungary.

7.  Defects in non-stoichiometric and stoichiometric lithium niobate: the present state-of-the-art and outlook. G.Malovichko. International Conference on Defects in Insulating Materials (ICDIM), April 3-7, 2000, Johannesburg, South Africa.

8.     Structure and interrelation of intrinsic and extrinsic defects in congruent, stoichiometric and regularly ordered lithium niobate. G. Malovichko.-International symposium on Laser, Scintillator and Nonlinear Optical Materials “PHOTONICS MATERIALS for the 21th CENTURY”, 28-31 May 2000, Lyon, France.

9.     Optimization of lithium niobate for advanced applications by variation of extrinsic and intrinsic defect subsystems. G.Malovichko, V.Grachev, E.Kokanyan, O.Schirmer. 5th European Conference on Application of Polar Dielectrics (ECAPD-5), 26-31 August 2000, Riga, Latvia

- Chairman session 5: Photorefraction and Related Phenomena.

10. Defects in nonstoichiometric and stoichiometric LiNbO3: Present state-of-the-art and perspectives. G. Malovichko, V. Grachev. – International Workshop on Microstructure of Oxide Materials, 13-15 June 2000, Osnabrueck, Germany.

Selected invited lectures

·        Georgia University, Athens, USA, May, 2000.

·        Paderborn University, Paderborn, Germany, June 1999.

·        Regensburg University, Regensburg, Germany, February, 1996.

·        Stuttgart University, Stuttgart, Germany, 1995.

·        Universities of Metz, Metz, France, 1994.

·        Aix-Marseille 3 University, Marseille, France, 1993.

 

    

Scientific articles in refereed journals and books [with pdf-files for download]

2005:
1.       B. Briat, V. G. Grachev, G. I. Malovichko, O. F. Schirmer, M.Wöhlecke. Defects in photorefractive materials and their investigations. Chapter in the bookSpringer Series in Optical Sciences: Photorefractive Materials and Applications”, ed. by P.Gunter and J.-P.Huignard. Volume II. (Accepted in July, 2004, it will be presented at CLEO meeting in May 2005).
2.      
G. Malovichko, V. Grachev, O. Schirmer. Multifrequency spectroscopy of defects in complex oxides. Physica Status Solidi (a), 202, No. 2, 207-221 (2005). [download]

2004:
1.      
V. Grachev, G. Malovichko, O. Schirmer. Structures of point defects in lithium niobate. Ukrainian Journal of Physics, 49, 438-448 (2004). [download]

 

2003:

1.       G.Malovichko, V.Grachev and O.Schirmer. Point Defects and Physical Properties of Ferroelectrics. Lithium Niobate. Fundamental Physics of Ferroelectrics 2003. Ed. by P.K.Davies and D.J.Singh, AIP Conference Proceedings, 677, pp. 196-203 (2003).  [download]

2.      M.Meyer, C.Veber, O.F.Schirmer, G.I.Malovichko, V.G.Grachev, M.Kaczmarek. BaTiO3 and Ba0.77Ca0.27TiO3 doped with Rhodium: quantitative determination of charge transfer parameters by EPR-based defect studies. OSA TOPS, v.87, 124-127 (2003).  [download]

2002:
1. 
ENDOR study of Cr3+ centers substituting for lithium in lithium niobate. G.Malovichko, V.Grachev, A.Hofstaetter, E.Kokanyan, A.Scharmann, O.Schirmer. Physical Review, B65, 224116 (2002).  [download]

1988-2001:
1.   Photosensitive centers and charge transfer processes in barium calcium titanate. G.Malovichko, V.Grachev, R.Pankrath, O.Schirmer. Ferroelectrics, 258, 169-176  (2001).  [download]
2.        Optimization of lithium niobate for advanced applications by variation of extrinsic and intrinsic defect subsystems. G.Malovichko, V.Grachev, E.Kokanyan, O.Schirmer. Ferroelectrics, 258, 131-140 (2001).
 [download]

3.        EPR, ENDOR, and optical absorption study of Cr3+ centers substituting for niobium in Li-rich lithium niobate crystals. V.Grachev, G.Malovichko.- Physical Review, B62, 7779-7790 (2000).  [download]

4.        EPR, NMR and ENDOR study of intrinsic and extrinsic defects in regularly ordered and disordered Lithium Niobate crystals. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan, O.F.Schirmer. Ferroelectrics, 239, 357-366 (2000).  [download]

5.   Electro-optic properties in Fe-doped LiNbO3 crystals as function of composition. K.Chah, M.Aillerie, M.D.Fontana, G.Malovichko. Optics Communications, 176, 261-265 (2000).

6.        New spectroscopic investigation of Cr3+ centres in LiNbO3 crystals. F.Lhommé, P.Bourson, G.Boulon, Y.Guyot, R.Burlot-Loison, M.D.Fontana, M.Aillerie, G.Malovichko. J. of Luminescence, 83-84, 441-445  (1999).

7.        Influence of the non-stoichiometry on the electro-optic properties in pure LiNbO3. M.Aillerie, K.Chah, F.Abdi, P.Bourson, M.D.Fontana, K.Polgar, G.Malovichko. Ferroelectrics. 223, No 1-4, 365-372, (1999).

8.        Nonstoichiometry as a powerful tool for photorefractive material optimization. Lithium Niobate Crystals. G.Malovichko. Proc. of the 7-th Top.Meet. on Photorefractive Materials, Effects and Devices, Denmark, June 27-30 1999, OSA TOPS, 27, 59-66.  [download]

9.        Interrelation of intrinsic and extrinsic defects – congruent, stoichiometric, and regularly ordered lithium niobate. G.Malovichko, V.Grachev, O.Schirmer.- Appl. Phys. B 68, 785-793 (1999).  [download]

10.    Axial and low-symmetry centers of trivalent impurities in lithium niobate. Chromium in congruent and stoichiometric crystals. G.Malovichko, V.Grachev, E.Kokanyan, O.Schirmer.- Physical Review, B59, 9113-9125 (1999).  [download]

11.    Point imperfections and clusters of intrinsic and extrinsic defects in non-stoichiometric and stoichiometric Lithium Niobate: The Regularly ordered crystal. G.Malovichko, V.Grachev, E. Kokanyan, O. Schirmer.- Radiation Effects and Defects in Solids, 150, No 2, 227-231 (619-623) (1999).  [download]

12.    Models of axial and low-symmetry impurity centers in lithium niobate crystals derived from EPR and ENDOR data. V.Grachev, G.Malovichko, O.Schirmer.- Radiation Effects and Defects in Solids, 150, No 2, 277-280 (669-672) (1999).  [download]

13.    New study of the 720 – 750 nm range in the emission spectra of LiNbO3:Cr3+ crystals with different compositions. F.Lhommé, P.Bourson, R.Moncorgé, R.Burlot, M.D. Fontana, M.Aillerie, G.Boulon, G.Malovichko. - Radiation Effects and Defects in Solids, 150, No 2, 259-263 (651-655) (1999).

14.    Electro-optic properties in undoped and Cr-doped LiNbO3 crystals.- K.Chah, M.D.Fontana, M.Aillerie, P.Bourson, G.Malovichko. Applied Phys. B 67, 65-71 (1998).

15.    Luminescence of Cr3+ in lithium niobate: influence of the chromium concentration and crystal composition. F.Lhomme, P.Bourson, M.D.Fontana, G.Malovichko, M.Aillerie, E. Kokanyan.- J. Physics: Condensed Matter 10, 1137-46 (1998). [download]

16.    High resolution electron microscopy investigation of correlated defects in non-stoichiometric lithium niobate. Ch.Leroux, G.Malovichko, G.Nihoul, V.Grachev, C.Boulesteix. - J. Phys. Chem. Solids, v. 59, No 3, pp.311-319, 1998. [download]

17.    The composition dependence of the Raman spectrum and new assignment of the phonons in LiNbO3. A.Ridah, P.Bourson, M.D Fontana, G.Malovichko.- J. Physics: Condensed Matter, 9687-9693, 1997. [download]

18.    Influence of chromium doping on the electro-optic properties of lithium niobate. K.Chah, M.Aillerie, M.D.Fontana, G.I.Malovichko, K.Betzler, E.Kokanyan. -Opt. Communs., v. 136, pp. 231-234, 1997.

19.    Electro-optical properties of chromium-doped LiNbO3. K.Chah, M.Aillerie, M.D.Fontana, G.I.Malovichko, E.Kokanyan. -Ferroelectrics, v. 186, pp. 13-16 (963-966), 1996.

20.    Effect of chromium concentration on site selective luminescence in nearly stoichiometric lithium niobate crystals. P.Bourson, G.Malovichko, A.Ridah, E.Kokanyan.- Ferroelectrics, v. 155, pp. 273-276 (907-910), 1996.

21.    Single, dimer and trimer chromium centers in lithium niobate. G.Malovichko, V.Grachev, O.Schirmer.- Ferroelectrics, v. 155, pp. 5-8 (639-642), 1996.

22.    Evolution des parametres de maille de LiNbO3 dope par le potassium ou le magnesium. O.Cerclier, V.G.Grachev, J.Estienne et G.Malovichko.- Les Edition de Physique: “Rayons X et Mateiere”, Proceedings of Colloque RX-95, Strasbourg, France, 1996, pp. 45-49.

23.    Comparative characterization of defect structure of stoichiometric and non-stoichiometric lithium niobate. G.Malovichko, V.Grachev, O.Schirmer.- Recuel de conferences “Mareriaux et composants piezo-pyro-ferroelectriques”, Journees D’Etudes, Limoges, 19-20 March 1996, pp. 4.D1-4.D5.

24.    Lattice constants of K and Mg doped LiNbO3. Comparison with nonstoichiometric crystals. G.Malovichko, O.Cerclier, J.Estienne, V.Grachev, E.Kokanyan, C.Boulesteix. - J. Phys. Chem. Solids, 1995, v. 56, pp.1285-1289.

25.    The effect of iron ions on the defect structure of lithium niobate crystals grown from K2O containing melts. G.I.Malovichko, V.G.Grachev, O.F.Schirmer. - Solid State Communications, 1994, v. 89, No 3, 195-198.

26.    New axial Fe3+ centers in stoichiometric lithium niobate crystals. G.I.Malovichko, V.G.Grachev, O.F.Schirmer, B.Faust. - J. Phys.: Condens. Matter,  1993, v. 5,  3971-3976. [download]

27.    Refinement of lithium niobate crystals from nonstoichiometric defects by doping with potassium. G.Malovichko, V.Grachev, L.Yurchenko V.Proshko, E.Kokanyan. - Proceedings of International Conference on Defects in Insulating Materials, Schloss Nordkirchen, 1993, p. 114-117.

28.    Characterization of stoichiometric lithium niobate grown from melts containing K2O. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan, O.F.Schirmer, K.Betzler, B.Gather, F.Jermann, S.Klauer, U.Schlarb, M.Wöhlecke. - Appl. Phys., 1993, v. A56, 103-108.

29.    Improvement of LiNbO3 microstructure by crystal growth with potassium. G.I.Malovichko, V.G.Grachev, L.P.Yurchenko, V.Ya.Proshko, E.P.Kokanyan, V.T.Gabrielyan. - Phys. Stat. Sol. (a), 1992, v. 133, No 1, p. K29-K33.

30.    Low-symmetry Fe-Mg complexes in LiNbO3:Mg. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan. - Ferroelectrics, 1992, v. 125, No 1-4, p.289-294.

31.    Control of the impurity and proper defects in lithium niobate crystals by the EPR and ENDOR methods. M.D.Glinchuk, G.I.Malovichko, I.P.Bykov, V.G.Grachev. - Ferroelectrics, 1989, v. 92, No 1, 83-87.

32.    TH-resonance - a new research method for ferro- and piezoelectric ceramics. G.I.Malovichko, M.D.Glinchuk, V.G.Grachev. - Proceedings of the International Conference « Ceramic for electronics », Pardubitse, CSSR, 1988, part III, p.143-146.

 

 

Published contributions to the academic conferences

1.        Photosensitive centers and charge transfer processes in barium calcium titanate. G.Malovichko, V.Grachev, R.Pankrath, O.Schirmer. 5th European Conference on Application of Polar Dielectrics (ECAPD-5), Riga, Latvia, 26-31 August 2000.

2.        Optimization of lithium niobate for advanced applications by variation of extrinsic and intrinsic defect subsystems. G.Malovichko, V.Grachev, E.Kokanyan, O.Schirmer. 5th European Conference on Application of Polar Dielectrics (ECAPD-5), Riga, Latvia, 26-31 August 2000.

3.        Structure and interrelation of intrinsic and extrinsic defects in congruent, stoichiometric and regularly ordered lithium niobate. G. Malovichko.-International symposium on Laser, Scintillator and Nonlinear Optical Materials “PHOTONICS MATERIALS for the 21th CENTURY”, 28-31 May 2000, Lyon, France.

4.        Defects in non-stoichiometric and stoichiometric lithium niobate: the present state-of-the-art and outlook. G.Malovichko. International Conference on Defects in Insulating Materials (ICDIM), March 3-7, 2000, Johannesburg, South Africa.

5.        Photosensitive paramagnetic centers in barium calcium titanate crystals. G.I.Malovichko, V.G.Grachev, O.F.Schirmer, R.Pankrath, H.Hesse. 12th International Symposium on Integrated Ferroelectrics, March 12-15, 2000, Aachen, Germany, p. 335.

6.        Characterization of nonstoichiometric and regularly ordered lithium niobate for advanced applications. G.I.Malovichko, V.Grachev, O.Schirmer, E.Kokanyan. 12th International Symposium on Integrated Ferroelectrics, March 12-15, 2000, Aachen, Germany, p. 205.

7.        EPR, NMR and ENDOR study of intrinsic and extrinsic defects in regularly ordered and Disordered Lithium Niobate crystals. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan, O.F.Schirmer. 9-th European Meeting on Ferroelectricity, July 12-16, 1999, Praha, Chech Republic, p. 25.

8.        Influence of the non-stoichiometry on the electro-optic properties in pure LiNbO3. M.Aillerie, K.Chah, F.Abdi, P.Bourson, M.D.Fontana, K.Polgar, G.Malovichko.- ECAPD IV’98 (European Conference on Application of Polar Dielectrics). Montreux (Suisse) - 24-27 August 1998.

9.        Models of axial and low-symmetry impurity centers in lithium niobate crystals derived from EPR and ENDOR data. G.Malovichko, V.Grachev, O.Schirmer. - 29th AMPERE-13th ISMAR International Conference on Magnetic Resonance and Related Phenomena - Berlin (Germany) - 2-7 August 1998.

10.    Point imperfections and clusters of intrinsic and extrinsic defects in non-stoichiometric and stoichiometric Lithium Niobate: The Regularly ordered crystal. G. Malovichko, V. Grachev, E. Kokanyan, O. Schirmer.- EURODIM 98 – Keele (UK) - 6-11 July 1998.

11.    Models of axial and low-symmetry impurity centers in lithium niobate crystals derived from EPR and ENDOR data. V.Grachev, G.Malovichko, O.Schirmer.- EURODIM 98 - Keele (UK) – 6-11 July 1998.

12.    New study of the 720 - 750 nm range in the emission spectra of LiNbO3:Cr3+ crystals with different compositions. F.Lhommé, P.Bourson, R.Moncorgé, R.Burlot, M.D.Fontana, M.Aillerie, G.Boulon, G.Malovichko.- EURODIM 98 – Keele (UK) – 6-11 July 1998.

13.    Neodymium in Stoichiometric LiNbO3: an EPR and ENDOR study. F. Hennecker, A. Hofstaetter,  A. Scharmann, G. Malovichko, V. Grachev,, E.Kokanyan.- Third European ESR meeting "Modern Aspects of Structure and Dynamic Investigation of Paramagnetic Systems by EPR", Leipzig, August 24-29, 1997, P37.

14.    EPR and ENDOR of Cr3+ in Lithium Niobate. V.Grachev, G.Malovichko, A.Hofstaetter, A.Scharmann, O.Schirmer,- Workshop of the Oxide Crystals Network, Budapest, Hungary, 25-28 September 1996, p. W2.

15.    Neodimium in Stoichiometric LiNbO3: An EPR and ENDOR Study. V.Grachev, F.Henecker, A.Hofstaetter, E.P.Kokanyan, G.Malovichko, A.Scharmann,- Workshop of the Oxide Crystals Network, Budapest, Hungary, 25-28 September 1996, p. W2.

16.    Stoichiometric and non-stoichiometric lithium niobate. Characterization of defect structure, G.Malovichko, V.Grachev, E.P.Kokanyan, O.F.Schirmer,- Workshop of the Oxide Crystals Network, Budapest, Hungary, 25-28 September 1996, p. W2.

17.    Electro-optical properties of chromium-doped LiNbO3. K.Chah, M.Aillerie, M.D.Fontana, G.I.Malovichko, E.Kokanyan.- The 8 European Meeting on Ferroelectricity, Nijmegen, The Netherlands, July 4-8, 1995.

18.    Effect of stoichiometry and chromium concentration on site selective luminescence in lithium niobate. P.Bourson, G.Malovichko, E.Kokanyan.- The 8 European Meeting on Ferroelectricity, Nijmegen, The Netherlands, July 4-8, 1995.

19.  Investigation of physical-chemical basis to obtain stoichiometric lithium niobate crystals. G.Malovichko, E.Kokanyan, V.G.Grachev, O.Cerclier, J.Estienne.-Abstracts of CLEO/QELS 95, Baltimore, USA, 21-25 May, 1995, p.CWF-60.

20. Lithium tetraborate as a tool for ESR dosimetry: sensitivity to different irradiation and structure of created centers. G.Malovichko, V.Grachev, A.Matkovskii, Ya.Burak.-4th International Symposium on ESR Dosimetry and Applications, München/Neuherberg, Germany, May 1995, p.114.

21. Influence of stoichiometry on various properties of LiNbO3. G.I.Malovichko, V.G.Grachev, A.Hofstaetter, A.Scharmann, O.Schirmer.-International Workshop on “LiNbO3 and realated oxyde crystals”, Lisboa, Portugal, March, 1995.

22. High resolution electron microscopy experiments interpreted with different models of nonstoichiometric lithium niobate. Ch.Leroux, G.Nihoul, G.Malovichko, V.Grachev, C.Boulesteix.- XIII International Congress on Electron Microscopy, Paris, France, July, 1994.

23. Lithium niobate structure for nonstoichiometric crystals; high-resolution electron microscopy experiments compared with several models. Ch.Leroux, G.Nihoul, G.Malovichko, V.Grachev, C.Boulesteix.- Abstracts of YIII EURODIM conference, Lyon, France, July, 1994.

24. Radiation defect formation in lithium tetraborate (LTB) single crystals. A.O.Matkovskii, Ya.V.Burak, D.Yu.Sugak, G.I.Malovichko, V.G.Grachev. - Abstracts of VIII International Meeting on Ferroelectricity, Glithersburg, MD, USA, August 1993, p.118.

25. Intrinsic and impurity defects in lithium niobate crystals grown from melts containing potassium.. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan, O.Schirmer.- Abstracts of VIII International Meeting on Ferroelectricity, Glithersburg, MD, USA, August 1993, p.112.

26. Low-symmetry Fe-Mg complexes in LiNbO3:Mg. G.I.Malovichko, V.G.Grachev, E.P.Kokanyan. - Abstracts of VII European Meeting on Ferroelectricity, Dijon, France, 1991, p.337.

27. ESR investigation of the radiation defects structure in lithium tetraborate. G.I.Malovichko, V.G.Grachev, A.P.Pechoniy. - Abstracts of XXV Congress AMPERE “Magnetic Resonance and Related Phenomena”, Stuttgart, Germany, September 1990, p.28.

33. Radiospectroscopic investigation of the impurity and proper defects and temperature and pressure influence on the LiNbO3 ferroelectric. G.I.Malovichko, M.D.Glinchuk, V.G.Grachev.- Abstracts of XXIV Congress AMPERE “Magnetic Resonance and Related Phenomena”, Poznan, Poland, 29.8-3.9, 1988, p.B104.

34. Control of impurity and proper defects in lithium niobate by EPR and ENDOR methods. M.D.Glinchuk, V.G.Grachev, G.I.Malovichko, I.P.Bykov.- Abstracts of 1-th European conference on application of polar dielectrics, Zürich, Switzerland, 29.8-1.9, 1988, p.41.

 

Invited  lectures

1.         Evolution of conception of intrinsic and extrinsic defects in lithium niobate. Fourth Annual Meeting of the COST Action P2 "Applications of nonlinear optical Phenomena" and Workshop on LiNbO3.

2.         Optimization of lithium niobate for advanced applications by variation of extrinsic and intrinsic defect subsystems. 5th European Conference on Application of Polar Dielectrics (ECAPD-5), Riga, Latvia, August 2000.

3.         Defects in non-stoichiometric and stoichiometric LiNbO3: the present state-of-the-art and perspectives. International Workshop on Microstructure of Oxide Materials, Osnabrück, Germany, 13-15 June 2000.

4.         Defects in non-stoichiometric and stoichiometric lithium niobate: the present state-of-the-art and outlook. Stanford University, Palo Alto, USA, May 2000.

5.         Defects in non-stoichiometric and stoichiometric lithium niobate: the present state-of-the-art and outlook. University of Georgia, Athens, USA, May 2000.

6.        Structure and interrelation of intrinsic and extrinsic defects in congruent, stoichiometric and regularly ordered lithium niobate. 2nd International Symposium on Laser and Nonlinear Optical Materials: Photonics Materials for 21 Century, Lyon, France, May, 2000.

7.         Defects in non-stoichiometric and stoichiometric lithium niobate: the present state-of-the-art and outlook. 14th International Conference on Defects in Insulating Materials (ICDIM), Johannesburg, South Africa, April 2000.

8.         Chromium satellite centers in congruent and stoichiometric LiNbO3.- Osnabrück University, Osnabrück, Germany, January, 1998.

9.         Stoichiometric and non-stoichiometric lithium niobate. Characterization of defect structure.- Osnabrück University, Osnabrück, Germany, October, 1996.

10.     Defect structure stoichiometric and non-stoichiometric lithium niobate. - Regensburg University, Regensburg, Germany, February, 1996.

11.     EPR and ENDOR study of Cr and Fe centers in stoichiometric and non-stoichiometric LiNbO3 crystals.- Stuttgart University, Stuttgart, Germany, March, 1995.

12.     ENDOR study of Cr and Fe centers in stoichiometric LiNbO3 crystal grown from the melt with potassium.- Osnabrück University, Osnabrück, Germany, September, 1994.

13.     X-ray and High Resolution Electron Microscopy investigations of intrinsic and extrinsic defects in congruent, stoichiometric and Mg doped LiNbO3 crystal.- Institute of Semiconductors, Ukrainian Academy of Sciences, Kiev, March, 1994.

14.     Stoichiometric lithium niobate and its characterization.- Metz University - Supelec, Metz, France, November, 1993.

15.     Dependence of lithium niobate properties on type and concentration of point defects.- Aix-Marseille 3 University, Marseille, France, March, 1993.

16.     Improvement of LiNbO3 microstructure by crystal growth with potassium.- Osnabrück University, Osnabrück, Germany, April, 1992.

17.     Influence of extrinsic and intrinsic defects, pressure and temperature on lithium niobate properties (EPR investigation).- Osnabrück University, Osnabrück, Germany, September, 1991..

18.    Influence of nonstoichiometry and dopants on lithium niobate properties.- International School on Physics of crystals with phase transitions, Borovitsi, Poland, September, 1988.