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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >The impact of Pr and Nd substitution on structure, hysteresis and magnetocaloric properties of La1-x(Pr, Nd)(x)Fe11.6Si1.4
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The impact of Pr and Nd substitution on structure, hysteresis and magnetocaloric properties of La1-x(Pr, Nd)(x)Fe11.6Si1.4

机译：PR和ND替代对La1-X（Pr，Nd）（x）Fe11.6si1.4的结构，滞后和磁热性质的影响

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摘要

In this study, a combination of induction melting and suction casting methods were used to produce a series of high-purity samples of La1-xRxFe11.6Si1.4 system with R = Pr and Nd for x = 0.1, 0.2, 0.3 and 0.4. The Curie temperature (T-C) is lowered for all the substituted compositions compared to LaFe11.6Si1.4, while the hysteresis area shows a small increase for higher amounts of substitution element. The estimated isothermal magnetic entropy change (Delta S-T) of all samples are in the same range with a maximum of 25 Jkg(-1)K(-1)Delta T-ad, under the cyclic conditions for all compositions decreases compared to the first application of the magnetic field due to the thermal hysteresis. Applying the Bean-Rodbell model to the isothermal magnetization data, the temperature dependence of the critical field was found. Excluding the phase transition region, the model accurately describes the temperature and field dependence of magnetization above and below the magnetic transition, highlighting the magnetic moment change of the system due to the structural transformation.
机译：本研究采用感应熔炼和吸铸相结合的方法制备了一系列高纯度的La1-xRxFe11样品。6Si1。4对于x=0.1、0.2、0.3和0.4，R=Pr和Nd的系统。与LaFe11相比，所有取代组分的居里温度（T-C）均降低。6Si1。4，而当替代元素含量较高时，滞后面积会略有增加。在循环条件下，由于热滞效应，与第一次施加磁场相比，所有成分的估算等温磁熵变（δS-T）均在相同范围内，最大值为25 Jkg（-1）K（-1）δT-ad。将Bean-Rodbell模型应用于等温磁化数据，发现了临界场的温度依赖性。除相变区外，该模型准确地描述了磁相变上方和下方磁化的温度和磁场依赖性，突出了系统由于结构转变而产生的磁矩变化。

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