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首页> 外文期刊>European Physical Journal Plus >Study of magnetic transition and magnetic entropy changes of Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3 compounds
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Study of magnetic transition and magnetic entropy changes of Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3 compounds

机译：Pr0.6Sr0.4MnO3和Pr0.6Sr0.4Mn0.9Fe0.1O3化合物的磁跃迁和磁熵变的研究

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摘要

In the present work, we analyze the magnetic transition and magnetic entropy change vertical bar Delta S-M vertical bar of Pr0.6Sr0.4Mn1 xFexO3 samples. Using Arrott plots, we report that the phase transition for Pr0.6Sr0.4MnO3 sample is of second order, while the Pr0.6Sr0.4Mn0.9Fe0.1O3 sample exhibits a first-order magnetic phase transition. From the magnetization measurements at temperature close to the Curie temperature, the magnetic entropy change, vertical bar Delta S-M vertical bar and the Relative Cooling Power (RCP) have been estimated. The maximum of magnetic entropy change vertical bar Delta S-M(max)vertical bar reaches, under an applied magnetic field of 5T, 3.58 and 3.66 J/kgK for Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3, respectively. The RCP values have been estimated to 159.37 and 223.52 J/kg. For both samples, the vertical bar Delta S-M vertical bar values evaluated using the Maxwell theory were found in accordance with those calculated by the Landau theory.
机译：在本工作中，我们分析了Pr0.6Sr0.4Mn1 xFexO3样品的磁跃迁和磁熵变垂直线Delta S-M垂直线。使用Arrott图，我们报告Pr0.6Sr0.4MnO3样品的相变是二阶的，而Pr0.6Sr0.4Mn0.9Fe0.1O3样品则表现出一阶磁相变。根据接近居里温度的温度下的磁化测量，可以估算出磁熵变，垂直线Delta S-M垂直线和相对冷却功率（RCP）。在5T的施加磁场下，Pr0.6Sr0.4MnO3和Pr0.6Sr0.4Mn0.9Fe0.1O3的最大磁熵变垂直条Delta S-M（max）垂直条分别达到3.58和3.66 J / kgK。 RCP值估计为159.37和223.52 J / kg。对于这两个样品，根据由Landau理论计算得出的值，找到了使用Maxwell理论评估的竖线Delta S-M竖线值。

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