Phonon Drag and Magnetic Anomalies of Thermopower in RB_{12} (R = Ho, Er, Tm, Lu)

• Authors: V. Glushkov , S. Demishev , M. Ignatov , E. Khayrullin , N. Sluchanko , N. Shitsevalov , A. Levchenko , V. Filipov , K. Flachbart , K. Siemensmeyer
• Languages of publication: EN

Abstracts

EN

High precision measurements of the Seebeck coefficient S(T) were carried out on the single crystals of RB_{12} (R = Ho, Er, Tm, Lu) at temperatures 2-300 K. It was shown that the effects of phonon drag result from vibrations of rare earth ions (ħω_E≈10-33 meV) in the rigid framework structure of the B_{12} clusters and determine the main contribution to thermopower at intermediate temperatures (30-300 K). The correlated behavior of transport parameters favors the appreciable enhancement of spin fluctuations in the sequence of magnetic compounds (HoB_{12}-TmB_{12}) when approaching to the valence instability state in YbB_{12}. The giant increase in S(T) detected in the vicinity of the Néel temperature T_N for HoB_{12}, ErB_{12}, and TmB_{12} seems to result from the density of states renormalization caused by antiferromagnetic ordering.

Keywords

EN

72.15.Jf; 75.50.Ee

Discipline

• 72.15.Jf: Thermoelectric and thermomagnetic effects
• 75.50.Ee: Antiferromagnetics

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 275-278

Dates

published

2008-01

received

2007-07-09

Contributors

author

V. Glushkov

• A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia

author

S. Demishev

• A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia

author

M. Ignatov

• A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia

author

E. Khayrullin

• A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia

author

N. Sluchanko

• A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia

author

N. Shitsevalov

• A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia
• Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky str., 03680 Kiev, Ukraine

author

A. Levchenko

• Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky str., 03680 Kiev, Ukraine

author

V. Filipov

• Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky str., 03680 Kiev, Ukraine

author

K. Flachbart

• Center of Low Temperature Physics, IEP SAS, 04001 Košice, Slovakia

author

K. Siemensmeyer

• Hahn-Meitner Institute, 100, Glienicker Str., 14109 Berlin, Germany

References

• 1. A. Kohout, I. Batko, A. Czopnik, K. Flachbart, S. Matas, M. Meissner, Y. Paderno, N. Shitsevalova, K. Siemensmeyer, Phys. Rev. B 70, 224416 (2004)
• 2. Yu. Paderno, V. Filippov, N. Shitsevalova, in: Boron-Rich Solids, AIP Conf. Proc., Eds. D. Emin, T.L. Aselage, A.C. Switendick, D. Morosin, C.L. Beckel, Vol. 231, AIP, New York 1991, p. 460
• 3. N.E. Sluchanko, V.V. Glushkov, S.V. Demishev, M.V. Kondrin, N.A. Samarin, V.V. Moshchalkov, V.V. Brazhkin, J. Exp. Theor. Phys. 86, 190 (1998)
• 4. L. Bogomolov, V. Glushkov, S. Demishev, M. Ignatov, Eu. Khayrullin, N. Samarin, D. Sluchanko, A. Levchenko, N. Shitsevalova, K. Flachbart, Phys. Status Solidi B 243, R72 (2006)
• 5. V. Glushkov, M. Ignatov, S. Demishev, V. Filippov, K. Flachbart, T. Ishchenko, A. Kuznetsov, N. Samarin, N. Shitsevalova, N. Sluchanko, Phys. Status Solidi B 243, R63 (2006)

Identifiers

DOI

10.12693/APhysPolA.113.275