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2010 | 118 | 5 | 929-930
Article title

Anomalies of Heat Capacity and Phase Transitions in Tm_{1-x}Yb_{x}B_{12}

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EN
Abstracts
EN
In the system Tm_{1 - x}Yb_{x}B_{12} the specific heat has been studied in a wide range of Yb-concentration in the vicinity of the quantum critical point x_{C} ≈ 0.3. The results were obtained on high quality single crystalline samples of Tm_{0.7}Yb_{0.3}B_{12} compound placed near quantum critical point, both for antiferromagnetic metals (x < x_{C}) as well as for paramagnetic insulators (x > x_{C}) within a wide temperature range of 1.9-300 K in magnetic field up to 9 T. The temperature dependence of the magnetic contribution to specific heat for Tm_{0.74}Yb_{0.26}B_{12} shows a logarithmic divergence of the form C_{mag}/T∿-lnT at T<4 K, which may be attributed to the quantum critical regime, and it is suppressed by strong external magnetic field. The Schottky anomaly of the magnetic contribution to specific heat in Tm_{1 - x}Yb_{x}B_{12} has been established and analyzed in detail.
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EN
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
author
  • P.N. Lebedev Physical Institute of RAS, 53, Leniskii prospect, 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
  • Centre of Low Temperature Physics, IEP SAS and IPS FS UPJS, 04001 Košice, Slovakia
author
  • Centre of Low Temperature Physics, IEP SAS and IPS FS UPJS, 04001 Košice, Slovakia
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv118n5086kz
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