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2008 | 113 | 1 | 275-278
Article title

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

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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
Publisher

Year
Volume
113
Issue
1
Pages
275-278
Physical description
Dates
published
2008-01
received
2007-07-09
Contributors
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia
author
  • A.M. Prokhorov General Physics Institute of RAS, 38, Vavilov str., Moscow, 119991, Russia
  • 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
  • Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky str., 03680 Kiev, Ukraine
author
  • Institute for Problems of Materials Science of UAS, 3, Krzhyzhanovsky str., 03680 Kiev, Ukraine
author
  • Center of Low Temperature Physics, IEP SAS, 04001 Košice, Slovakia
  • 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)
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n1067kz
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