Observation of low, intermediate, and high spin states in GdBaCo2O5.45 -: art. no. 064437

被引：80

作者：

Roy, S ^{[1
]}

Khan, M ^{[1
]}

Guo, YQ ^{[1
]}

Craig, J ^{[1
]}

Ali, N ^{[1
]}

机构：

[1] So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.65.064437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic and electrical transport properties and relative thermal expansion measurements on GdBaCo2O5.45 show the existence of a stabilized intermediate spin state of Co3+ in the temperature region 108 Kless than or equal toTless than or equal to365 K. A charge ordering effect at 242 K due to Jahn-Teller effect followed by a ferromagnetic transition is observed in the intermediate spin state. Thermal expansion data reveal second and first order phase transitions at 163 and 359 K, respectively. These are explained as due to spin state transition accompanied by a change in the ionic radius of Co3+ in different spin states.

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页码：1 / 5

页数：5

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