Nonequilibrium magnetic properties of single-crystalline La0.7Ca0.3CoO3 -: art. no. 144423

被引：47

作者：

Kundu, AK

Nordblad, P

Rao, CNR

机构：

[1] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

[2] Uppsala Univ, Dept Engn Sci, S-75121 Uppsala, Sweden

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.72.144423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic and electric properties of a single crystal of La0.7Ca0.3CoO3 have been experimentally studied. The system attains a ferromagnetic spontaneous moment below 170 K and exhibits a reentrant spin-glass phase below 100 K. In the ordered and the reentrant phases, the low-field magnetic properties are strongly direction dependent, showing considerably higher magnetization values perpendicular than parallel to the c axis. Magnetic relaxation experiments show that both the ferromagnetic and the reentrant spin-glass phases are nonequilibrium states, where the system exhibits magnetic aging characteristic of spin glasses and disordered and frustrated ferromagnets.

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页数：6

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