首页> 外文期刊>IEEE Transactions on Magnetics >Magnetic and Magnetoresistive Properties of Pr$_{1 - {rm x}}$ Ca$_{rm x}$ CoO

机译:Pr $ _ {1-{rm x}} $ Ca $ _ {rm x} $ CoO

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摘要

Polycrystalline perovskite Pr$_{0.7}$ Ca$_{0.3}$ CoO$_{3}$ and Pr$_{0.5}$ Ca$_{0.5}$ CoO$_{3}$ have been investigated by electrical resistivity, magnetization, ac susceptibility, and $mu$ SR measurements. The magnetic measurements data indicate that the samples have, at low temperatures, similar properties to the frustrated magnets. The $mu$SR measurements, suggest the presence of magnetic clusters at low temperatures. The electrical behavior has the main features of conduction in a phase separated system: it shows negative magnetoresistance and it is controlled by grain-boundary effects.
机译:已通过电学方法研究了多晶钙钛矿Pr $ _ {0.7} $ Ca $ _ {0.3} $ CoO $ _ {3} $和Pr $ _ {0.5} $ Ca $ _ {0.5} $ CoO $ _ {{3} $电阻率,磁化强度,交流磁化率和SR测量值。磁测量数据表明,样品在低温下具有与失磁磁体相似的特性。 muSR的测量表明在低温下存在磁团簇。在相分离系统中,电学行为具有传导的主要特征:它表现出负磁阻,并且受晶界效应控制。

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