Structure and Large Magnetic Entropy Change in Double-Layered Manganese Oxide Pr_{lass="a-plus-plus">1.4}Sr_{lass="a-plus-plus">1.6}Mn_{lass="a-plus-plus">2}O_{lass="a-plus-plus">7}

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• 作者：Li-an Han ; Jing Yang ; Hua-ping Yang…
• 关键词：Double ; layered manganese oxide ; Structure ; Magnetic entropy change
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：30
• 期：1
• 页码：209-214
• 全文大小：<len>
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

Pr_1.4Sr_1.6Mn₂O₇ compound was prepared by a standard ceramic route, and its structure and magnetocaloric effect have been studied by using an X-ray diffractometer and magnetic measurements. This compound exhibits a single ferromagnetic (FM) to paramagnetic (PM) transition at the Curie temperature (T_C) of 265 K. The maximum values of magnetic entropy change reach 2.43 and 5.06 J kg−1 K−1 for the magnetic field change of 2 and 5 T. The corresponding values of relative cooling power are 94.26 and 233.32 J kg−1. Such results demonstrate that the Pr_1.4Sr_1.6Mn₂O₇ manganese oxide could be an excellent candidate for working materials in the household application of the magnetic refrigeration. Moreover, according to Banerjee’s criteria and Franco’s universal curves, we have demonstrated the existence of a second-order magnetic transition in the Pr_1.4Sr_1.6Mn₂O₇ compound.