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

• Authors: N. Sluchanko , A. Azarevich , A. Bogach , V. Glushkov , S. Demishev , S. Gavrilkin , N. Shitsevalova , V. Fillipov , S. Gabani , K. Flachbart
• Languages of publication: 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.

Keywords

EN

75.40.-s

Discipline

• 75.40.-s: Critical-point effects, specific heats, short-range order(for equilibrium properties near critical points, see 64.60.F-; for dynamical critical phenomena, see 64.60.Ht)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 929-930

Dates

published

2010-11

Contributors

author

N. Sluchanko

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

author

A. Azarevich

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

author

A. Bogach

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

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

S. Gavrilkin

• P.N. Lebedev Physical Institute of RAS, 53, Leniskii prospect, Moscow, 119991, Russia

author

N. Shitsevalova

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

author

V. Fillipov

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

author

S. Gabani

• Centre of Low Temperature Physics, IEP SAS and IPS FS UPJS, 04001 Košice, Slovakia

author

K. Flachbart

• Centre of Low Temperature Physics, IEP SAS and IPS FS UPJS, 04001 Košice, Slovakia

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Identifiers

DOI

10.12693/APhysPolA.118.929