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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