Anomalous Schottky Specific Heat and Structural Distortion in Ferromagnetic PrAl2

被引：38

作者：

Pathak, Arjun K. ^{[1
]}

Paudyal, D. ^{[1
]}

Mudryk, Y. ^{[1
]}

Gschneidner, K. A., Jr. ^{[1
,2
]}

Pecharsky, V. K. ^{[1
,2
]}

机构：

[1] Iowa State Univ, US Dept Energy, Ames Lab, Ames, IA 50011 USA

[2] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 18期

关键词：

CONDUCTION-ELECTRON-EXCHANGE; MAGNETIC-PROPERTIES; FIELD; METAL; TRANSITION; GADOLINIUM; ANISOTROPY; BEHAVIOR; TERBIUM; MOMENT;

D O I：

10.1103/PhysRevLett.110.186405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Unique from other rare earth dialuminides, PrAl2 undergoes a cubic to tetragonal distortion below T = 30 K in a zero magnetic field, but the system recovers its cubic symmetry upon the application of an external magnetic field of 10 kOe via a lifting of the 4f crystal field splitting. The nuclear Schottky specific heat in PrAl2 is anomalously high compared to that of pure Pr metal. First principles calculations reveal that the 4f crystal field splitting in the tetragonally distorted phase of PrAl2 underpins the observed unusual low temperature phenomena.

引用

页数：5

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