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首页> 外文期刊>Journal of Experimental and Theoretical Physics >Magnetocaloric properties of La_(1 - X) KxMnO_3 manganites
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Magnetocaloric properties of La_(1 - X) KxMnO_3 manganites

机译：La_（1-X）KxMnO_3锰矿的磁热性质

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摘要

A technology for obtaining single-phase ceramic samples of La _(1 - x) K _x MnO_3 manganites, as well as the dependence of their structure parameters on the potassium content, is described. The magnetocaloric effect in the samples has been measured by two direct methods, the classical method and the magnetic field modulation method, and has been calculated from the specific heat data. The values of the magnetocaloric effect obtained by these methods are significantly different. The observed discrepancies have been explained. Correlation between the doping level and the value of the effect has been found. It has been shown that the magnetic-field dependence of variation of the magnetic entropy near T _C in weak fields corresponds to theoretical calculations and that the value of the magnetocaloric effect in high magnetic fields can be predicted using this dependence.
机译：描述了一种用于获得La _（1-x）K _x MnO_3锰矿单相陶瓷样品的技术，以及其结构参数对钾含量的依赖性。样品中的磁热效应已通过两种直接方法（经典方法和磁场调制方法）进行了测量，并已根据比热数据进行了计算。通过这些方法获得的磁热效应的值明显不同。已解释了观察到的差异。已经发现掺杂水平和效应值之间的相关性。已经表明，在弱磁场中T _C附近的磁熵变化的磁场依赖性与理论计算相对应，并且可以使用这种依赖性来预测高磁场中的磁热效应的值。

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