Magnetic, magnetocaloric, and lattice properties of the La(Fe _xSi _(1-x)) 13 ferromagnets

Valiev E.Z.; Berger I.F.; Voronin V.I.; Kazantsev V.A.

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Magnetic, magnetocaloric, and lattice properties of the La(Fe _xSi _(1-x)) 13 ferromagnets

机译：La（Fe _xSi _（1-x））13铁磁体的磁，磁热和晶格性质

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The magnetic and lattice properties of a sample of La(Fe _(0.86)Si _(0.14)) _(13) ferromagnet have been measured. The influence that neutron irradiation has on the physical properties of this ferromagnet is studied. It is shown that the irradiation of this sample by a fluence of 3 × 10 ~(19) n/cm ~2 increases the lattice constant a and the Curie temperature (T _C) as the volume magnetostriction decreases. A model of ferromagnet is proposed which satisfactorily describes the dependence a(T) of the initial and irradiated samples and their magnetic properties. The temperature dependence of the change in entropy when switching the magnetic field on and off is calculated. It is established that the change in both the magnetic and lattice parts of the total entropy at the magnetic phase transition must be taken into account for La(Fe _xSi _(1-x))13 compounds.

机译：已测量了La（Fe _（0.86）Si _（0.14））_（13）铁磁体样品的磁性和晶格性质。研究了中子辐照对该铁磁体的物理性能的影响。结果表明，随着体积磁致伸缩的减小，以3×10〜（19）n / cm〜2的通量辐照该样品会增加晶格常数a和居里温度（T _C）。提出了一种铁磁体模型，该模型可以令人满意地描述初始和辐照样品的依赖性a（T）及其磁性能。计算在打开和关闭磁场时熵变化的温度依赖性。已确定，对于La（Fe _xSi _（1-x））13化合物，必须考虑磁性相变时总熵的磁性和晶格部分的变化。

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《Crystallography reports》 |2011年第7期|共5页
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Valiev E.Z.; Berger I.F.; Voronin V.I.; Kazantsev V.A.;
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中图分类晶体学;
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Magnetic, magnetocaloric, and lattice properties of the La(Fe _xSi _(1-x)) 13 ferromagnets

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