Department of Magnetism
VLADIMIR P. GNEZDILOV



E-mail: gnezdilov@ilt.kharkov.ua

Phone.: +(380) 57 341 0975

Name: Vladimir Gnezdilov

Business Address:
B.I. Verkin Institute for Low Temperature Physics & Engineering,
National Academy of Sciences of Ukraine, 47 Lenin Ave.,
61103 Kharkov, Ukraine

Education:
  • M.Sc. (Physics of Metals), National Polytechnical University, Kharkov, Ukraine, 1974
  • Postgraduate study (Physics of Magnetism), B.I. Verkin Institute for Low Temperature Physics & Engineering NASU, Kharkov, Ukraine, 1979-1982
  • Ph.D. (Physics of magnetic phenomena), B.I. Verkin Institute for Low Temperature Physics & Engineering NASU, Kharkov, Ukraine, 1984
  • Senior Researcher Diploma (Physics of Magnetism), B.I. Verkin Institute for Low Temperature Physics & Engineering NASU, Kharkov, Ukraine, 1991

Professional Career:

  • Staff Scientist, B.I. Verkin Institute for Low Temperature Physics & Engineering NASU, Kharkov, Ukraine, 1974 1990
  • Senior Staff Scientist, B.I. Verkin Institute for Low Temperature Physics & Engineering NASU, Kharkov, Ukraine, since 1990
  • Visiting Scientist, Institute for Microstructural Sciences, NRC, Canada, 1991 1992 (part time)
  • Visiting Scientist, Technical University Aachen, Germany, 1998 2002 (part time)
  • Visiting Scientist, MPI Stuttgart, Germany, 2003 2004 (part time)
  • Visiting Scientist, Technical University Braunschweig, Germany, since 2005 (part time)

Fields of Activity:
Magnetism in low symmetry and low dimensional systems; lattice dynamics and phase transitions; structural and magnetic frustration; interplay of lattice, magnetic, charge and orbital degrees of freedom.


Practical Experience:
1994 - The Int. Science Foundation Grant No. U2U;
1995 - The Int. Science Foundation Grant No. U2U200;
1996-1997 - European Community Research Grant INTAS No. 95-0217;
1998-1999 - European Community Research Grant INTAS No. 96-0410;
1999-2000 - European Community Research Grant INTAS No. 97-1371;
2001 - NATO Grant PST.CLG No. 97766;
2002 - European Community Research Grant INTAS No. 01-0278;
2008 - Polish-Ukrainian and Russian-Ukrainian international grants.

Special Awards: 2004 - Ukrainian State Prize in Science and Technology

Last-years Publications

  1. V.P. Gnezdilov, D.J. Lockwood, J.B. Webb, Resonant Raman scattering in InSb/In1-xAlxSb superlattices, Phys.Rev. B 48, 8442 (1993).
  2. V.P. Gnezdilov, D.J. Lockwood, J.B. Webb, Phonon Raman scattering in InSb/In1-xAlxSb strained-layer superlattices, Phys.Rev.B 48, 11228 (1993).
  3. V.P. Gnezdilov, D.J. Lockwood, J.B. Webb, Resonant Raman scattering in an InSb/In1-xAlxSb strained-layer superlattice and in In1-xAlxSb epilayers on InSb, Phys.Rev.B 48, 11234 (1993).
  4. V.P. Gnezdilov, D.J. Lockwood, J.B. Webb, P. Maigne, Raman scattering from In1-xAlxSb metastable epilayers, J.Appl. Phys. 74, 6883 (1993).
  5. V.P. Gnezdilov, D.J. Lockwood, J.B. Webb, Raman scattering study of longitudinal acoustic and optic phonons in InSb/In1-xAlxSb strained-layer superlattices, Solid State Electronics 37, 617 (1994).
  6. J.B. Webb, D.J. Lockwood, V.P. Gnezdilov, Magnetron sputter epitaxy and characterization of InSb/In1-xAlxSb strained layer superlattices, J. of Crystal Growth 137, 405 (1994).
  7. M.G. Cottam, V.P. Gnezdilov, H.J. Labbe, D.J. Lockwood, Light scattering from spin waves in MnF2, J. Appl. Phys. 76, 6883 (1994).
  8. O.A. Mironov, V.I. Khizhny, G. Braithwaite, E.H. C.Parker, P.J. Phillips, T.E. Whall, V.P. Gnezdilov, Observation of piezoelectric-like behaviour in coherently strained B-doped (100)SiGe/Si heterostructures, J. of Crystal Growth 157, 382 (1996).
  9. O.A. Mironov, P.J. Phillips, E.H.C. Parker, M. Mironov, V.P. Gnezdilov, V. Ushakov, V.V. Eremenko, Ellipsometry and Raman spectroscopy of MBE grown undoped Si-Si0.78Ge0.22/(001)Si superlattices, SPIE 3182, 216 (1997).
  10. O.A. Mironov, P.J. Phillips, E.H.C. Parker, M.G. Dowsett, N.P. Barradas, C. Jeyenes, M. Mironov, V.P. Gnezdilov, V. Ushakov, V.V. Eremenko, Structural and optical characterization of undoped Si-Si0.78Ge0.22 /Si(001) superlattices grown by MBE, Thin Solid Films 306, 307 (1997).
  11. V.P. Gnezdilov, M. Mironov, V. Ushakov, O.A. Mironov, P.J. Phillips, E.H.C. Parker, Optical study of MBE grown undoped Si-Si1-xGex/Si superlattices, Acta Physica Polonica 90, 1045 (1996).
  12. V.P. Gnezdilov, V.I. Fomin, V.S. Kurnosov, A.V. Peschanskii, V.V. Eremenko, S. Gentil, J.-P. Rivera, Light scattering in LiCoPO4 single crystal: analysis of the vibrational spectrum, 25, 1107 (1999).
  13. Yu.G. Pashkevich, V.P. Gnezdilov, A.V. Eremenko, P. Lemmens, G. Güntherodt, W. Reighardt, M. Braden, S.V. Shiryaev, S.N. Barilo, A.G. Soldatov, Local distortions in Ba1-xKxBiO3 observed in low frequency phonon Raman scattering, Int. Journ. Modern Phys. B 14, 3637 (2000).
  14. Yu.G. Pashkevich, V.A. Blinkin, V.P. Gnezdilov, V.S. Kurnosov, V.V. Tsapenko, V.V. Eremenko, P. Lemmens, M. Fischer, M. Grove, G. Güntherodt, L. Degiorgi, P. Wachter, J.M. Tranquada, D.J. Butrey, Optical studies of the charge ordered phase in La1.775Sr0.225NiO4, Physica B 284-288, 1473 (2000).
  15. Yu.G. Pashkevich, V.A. Blinkin, V.P. Gnezdilov, V.V. Tsapenko, V.V. Eremenko, P. Lemmens, M. Fischer, M. Grove, G. Güntherodt, L. Degiorgi, P. Wachter, J.M. Tranquada, D.J. Butrey, Stripe conductivity in La1.775Sr0.225NiO4, Phys. Rev. Lett. 84, 3919 (2000).
  16. V.P. Gnezdilov, V.I. Fomin, V.S. Kurnosov, A.V. Peschanskii, V.V. Eremenko, H. Shmid, J.-P. Rivera, S. Gentil, Raman scattering in LiNiPO4 single crystal, 28, 288 (2002).
  17. V.P. Gnezdilov, A.V. Yeremenko, Yu.G. Pashkevich, P. Lemmens, G. Güntherodt, J.M. Tranquada, D.J. Buttrey, K. Nakajima, Electronic Raman scattering through the stripe ordering transition in La2-xSrxNiO4, Low. Temp. Phys. 28, 510 (2002).
  18. V.P. Gnezdilov, Yu.G. Pashkevich, A.V. Yeremenko, P. Lemmens, G. Güntherodt, S.V. Shiryaev, G.L. Bychkov, and S.N. Barilo, Phonon Raman scattering in LaMn1-xCoxO3 (x=0, 0.2, 0.3, 0.4 and 1.0), Low Temperature Physics 29, 1269-72 (2003).
  19. K.-Y. Choi, P. Lemmens, G. Güntherodt, M. Pattabiraman, G. Rangarajan, V.P. Gnezdilov, G. Balakrishnan, D. McK. Paul, and M.R. Lees, Raman scattering study of Nd1-xSrxMnO3 (x=0.3, 0.5), Journ. Phys.: Cond. Mat. 15, 3333 (2003).
  20. P. Lemmens, V. Gnezdilov, N.N. Kovaleva, K.Y. Choi, H. Sakurai, E. Takayama-Muromachi, K. Takada, T. Sasaki, F.C. Chou, D.P. Chen, C.T. Lin and B. Keimer, Effect of Na content and hydration on the excitation spectrum of the cobaltite NaxCoO2yH2O, Journ. Phys.: Cond. Mat. 16, S857 (2004).
  21. K.-Y. Choi, P. Lemmens, G. Güntherodt, Yu. G. Pashkevich, V. P. Gnezdilov, P. Reutler, B. Büchner, A. Revcolevschi, Phonon anomalies in lightly-doped manganites La1-xSrxMnO3 (x=0.09 and 0.11) near the CAF/FI phase boundary, Journ. Magn. Magn. Mater. 272-276, E305 (2004).
  22. V.P. Gnezdilov, Yu.G. Pashkevich, J.M. Tranquada, P. Lemmens, G. Güntherodt, A.V. Yeremenko, S.N. Barilo, S.V. Shiryaev, L.A. Kurnevich, and P.M.Gehring, Interplay of structural and electronic phase separation in single crystalline La2CuO4 + 0.05 studied by Neutron and Raman scattering, Phys. Rev. B 69, 174508 (2004).
  23. Yu.G. Pashkevich, V.P. Gnezdilov, P. Lemmens, K.-Y. Choi, G. Güntherodt, A.V. Yeremenko, S.N. Barilo, S.V. Shiryaev, A.G. Soldatov, Giant phonon softening in ferromagnetic LaMnO3+δ, in E.C. Faulques, D.L. Perry, A.V. Yeremenko (eds.), Spectroscopy of Emerging Materials (Kluwer Academic Publishers, NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 165, Dordrecht, 2004), pp. 185-194.
  24. Yu.G. Pashkevich, V.P. Gnezdilov, P. Lemmens, K.-Y. Choi, K.V. Lamonova, A.A. Gusev, G. Güntherodt, S.N. Barilo, S.V. Shiryaev, G.L. Bychkov, Raman studies of single and polycrystalline cobaltites GdBaCo2O5+δ with δ close to 0.5, in E.C. Faulques, D.L. Perry, A.V. Yeremenko (eds.), Spectroscopy of Emerging Materials (Kluwer Academic Publishers, NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 165, Dordrecht, 2004), pp. 195-204.
  25. V.P. Gnezdilov, V.S. Kurnosov, Yu.G. Pashkevich, J. Tranquada, P. Lemmens, K.-Y. Choi, G. Güntherodt, A.V. Yeremenko, K. Nakajima, Phonons and magnons in La5/3Sr1/3NiO4 single crystal, in E.C. Faulques, D.L. Perry, A.V. Yeremenko (eds.), Spectroscopy of Emerging Materials (Kluwer Academic Publishers, NATO Science Series II: Mathematics, Physics and Chemistry, Vol. 165, Dordrecht, 2004), pp. 205-214.
  26. V.I. Fomin, V.V. Eremenko, V.P. Gnezdilov, V.S. Kurnosov, A.V. Peschanskii, Comparative Raman scattering study of optical excitations in the magnetoelectrics LiNiPO4 and LiCoPO4, in M. Fiebig et al. (eds.), Magnetoelectric Interaction Phenomena in Crystals Kluwer Academic Publishers, NATO Science Series II: Mathematics, Physics and Chemistry, Dordrecht, 2004), pp. 219-226.
  27. V.P. Gnezdilov, V. Kurnosov, Yu.G. Pashkevich, P. Lemmens, J.M. Tranquada, K.-Y. Choi, G. Güntherodt, K. Nakajima, A. Yeremenko, Phonons and magnons in stripe-ordered nickelates: A Raman scattering study, Low Temp. Physics 31 (2), 154-160 (2005).
  28. X.N. Zhang, P. Lemmens, B. Keimer, D.P. Chen, C.T. Lin, K.Y. Choi, V. Gnezdilov, F.C. Chou, Phonon scattering and stability of Na0.5CoO2, Physica B 359-361, 424 (2005).
  29. K.Y. Choi, P. Lemmens, G. Güntherodt, Yu. G. Pashkevich, V.P. Gnezdilov, P. Reutler, L. Pinsard-Gaudart, B. Büchner, A. Revcolevschi, Existence of orbital polarons in ferromagnetic insulating La1-xSrxMnO3 (0.1171, 174402 (2005).
  30. K.Y. Choi, P. Lemmens, G. Güntherodt, Yu. G. Pashkevich, V.P. Gnezdilov, P. Reutler, L. Pinsard-Gaudart, B. Büchner, A. Revcolevschi, Orbiton-mediated multi-phonon scattering in La1-xSrxMnO3, Phys. Rev. B 72, 024301 (2005).
  31. K.Y. Choi, V. Gnezdilov, B.C. Watson, M.W. Meisel, D.R. Talham, P. Lemmens, Raman scattering measurements of the spin ladder compound (C5H12N)2CuBr4, Journ. of. Phys.: Cond. Matter 17, 4237 (2005).
  32. V. Gnezdilov, K.-Y. Choi, Yu. Pashkevich, P. lemmens, S. Shiryaev, G. Bychkov, S. Barilo, V. Fomin, A.V. Yeremenko, Low temperature mixed spin state of Co3+ in LaCoO3 evidenced from Jahn-Teller lattice distortions, 32, 219 (2006).
  33. K.-Y. Choi, V.P. Gnezdilov, P. Lemmens, L. Capogna, M.R. Johnson, M. Sofin, A. Maljuk, M. Jansen, B. Keimer, Magnetic excitations and phonons in spin-chain compound NaCu2O2, Phys. Rev. B 73, 094409 (2006).
  34. K.-Y. Choi, Yu.G. Pashkevich, V.P. Gnezdilov, G. Güntherodt, A.V. Yeremenko, D.A. Nabok, V.I. Kamenev, S.N. Barilo, S.V. Shiryaev, A.G.Soldatov, and P. Lemmens, Orbital fluctuating state in ferromagnetic insulating LaMnO3+δ studied using Raman spectroscopy, Phys. Rev. B 74, 064406 (2006).
  35. P. Lemmens, K.-Y. Choi, V. Gnezdilov, E.Ya. Sherman, D.P. Chen, C.T. Lin, F.C. Chou, B. Keimer, Anomalous electronic Raman scattering in NaxCoO2yH2O, Phys. Rev. Lett. 96, 167204 (2006).
  36. R. Takagi, M. Johnsson, V. Gnezdilov, R.K. Kremer, W. Brenig, and P. Lemmens, Investigation of the novel oxohalogenide Cu4Te4O12Cl4 with Cu(II) tetrahedra, Phys. Rev. B 74, 04413 (2006).
  37. E. Meloshe, M.G. Cottam, V.P. Gnezdilov, D.J. Lockwood, One- and two-magnon Raman scattering in the canted antiferromagnet NiF2, JMMM 310, 1593 (2007).
  38. V. Gnezdilov, V. Bedarev, Yu. Pashkevich, P. Lemmens, S. Zvyagin, S. Gnatchenko, M. Pashenko, X. Mo, W. Queen, S.-J. Hwu, Structural phase transition in two-dimensional tetramer-cuprate Na5RbCu4(AsO4)Cl2, 33, 897 (2007).
  39. K.-Y. Choi, P. Lemmens, P. Scheib, V. Gnezdilov, Yu.G. Pashkevich, J. Hemberger, A. Loidl, V. Tsurkan, Anomalous electronic, phonon, and spin excitations in the chalcogenide spinel FeCr2S4, Journ. Phys.: Cond. Matter. 19, 145260 (2007).
  40. .., .., .., .., .., (CuSO4)(C2H8N2)2H2O, ³ . .. 783, 100 (2007).
  41. A. Donkov, M.M. Korshunov, I. Eremin, P. Lemmens, V. Gnezdilov, F.C. Chou, and C.T. Lin, Eltctron-phonon interaction in the laminar cobaltite NaxCoO2, Phys. Rev. B 77, 100504 (2008).
  42. V. Gnezdilov, P. Lemmens, A. A. Zvyagin, V. O. Cheranovskii, K. Lamonova, Yu. G. Pashkevich, R. K. Kremer, and H. Berger, Magnetic crossover and complex excitation spectrum of the ferromagnetic/antiferromagnetic spin-1/2 chain system α-TeVO4, Phys. Rev. B 78, 184407 (2008).
  43. V. Gnezdilov, P. Lemmens, P. Scheib, M. Ghosh, Yu. G. Pashkevich, H. Paulsen, V. Schunemann, J. A. Wolny, G. Agusti, and J. A. Real, Spectrum-sensitive phonon wipeout due to a fluctuating spin state in a Fe2+ coordination polymer, Phys. Rev. B 79, 045122 (2009).
  44. A.V. Peschanskii, V.P. Gnezdilov, V.I. Fomin, V.V. Eremenko, P. Lemmens, K.-Y. Choi, H. Berger, Raman scattering study of a two-dimensional S=1 quantum spin system Ni5(TeO3)4Cl2, . . 54, 205 (2009).