A thermodynamic framework for a system with itinerant-electron magnetism

被引：41

作者：

Wang, Y. ^{[1
]}

Hector, L. G., Jr. ^{[2
]}

Zhang, H. ^{[1
]}

Shang, S. L. ^{[1
]}

Chen, L. Q. ^{[1
]}

Liu, Z. K. ^{[1
]}

机构：

[1] Penn State Univ, University Pk, PA 16802 USA

[2] GM R&D Ctr, Warren, MI 48090 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 32期

关键词：

ALPHA-GAMMA-TRANSITION; KONDO VOLUME-COLLAPSE; HIGH-PRESSURE; PHASE-TRANSITION; CERIUM METAL; TEMPERATURE; CE; SUPERCONDUCTIVITY; PSEUDOGAP; BEHAVIOR;

D O I：

10.1088/0953-8984/21/32/326003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Thermodynamic fluctuation among many electronic states in systems with 'itinerant-electron' magnetism is addressed with a first-principles formulation of the Helmholtz energy. The Ce gamma-alpha phase transition is used as an illustrative case. The k(B) ln(2J + 1) form for the magnetic entropy that is commonly found in the literature is replaced with an expression that is derived from configurational fluctuations among nonmagnetic, ferromagnetic, and antiferromagnetic electronic states. Predicted first- and second-order magnetic phase transitions are in close accord with experiment. The mixture of states leads to a Schottky anomaly in the Ce specific heat.

引用

页数：7

共 50 条

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