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Magnetocaloric effect of Pr2Fe17−x Mn x alloys

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Abstract

Polycrystalline Pr2Fe17−x Mn x (x = 0, 1, and 2) alloys were studied by X-ray diffraction (XRD), heat capacity, ac susceptibility, and isothermal magnetization measurements. All the alloys adopt the rhombohedral Th2Zn17-type structure. The Curie temperature increases from 283 K at x = 0 to 294 K at x = 1, and then decreases to 285 K at x = 2. The magnetic phase transition at the Curie temperature is a typical second-order paramagnetic–ferromagnetic transition. For an applied field change from 0 to 5 T, the maximum −ΔS M for Pr2Fe17−x Mn x alloys with x = 0, 1, and 2 are 5.66, 5.07, and 4.31 J·kg−1·K−1, respectively. The refrigerant capacity (RC) values range from 458 to 364 J·kg −1, which is about 70 %–89 % that of Gd. The large, near room temperature ΔS M and RC values, chemical stability, and a high performance-to-cost ratio make Pr2Fe17−x Mn x alloys be selectable materials for room temperature magnetic refrigeration applications.

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Acknowledgments

This work was financially supported by the U.S. Department of Energy by Iowa State University (No. DE-AC02-07CH11358), the Guangdong Provincial Science & Technology Program (No. 2010B050300008), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (No. x2clB7120290), the Guangzhou Municipal Science and Technology Program (No. 12F582080022), and the Fundamental Research Funds for the Central Universities (Nos. 2012ZZ0013 and 2011ZM0014).

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Authors and Affiliations

  1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China

    Xi-Chun Zhong, Zhong-Wu Liu & De-Chang Zeng

  2. Ames Laboratory, U.S. Department of Energy, and Department of Materials Science and Engineering, Iowa State University, Ames, IA, 50011-3020, USA

    Xi-Chun Zhong, Karl A. Gschneidner Jr. & Vitalij K. Pecharsky

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  1. Xi-Chun Zhong
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Correspondence to Xi-Chun Zhong.

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Zhong, XC., Liu, ZW., Zeng, DC. et al. Magnetocaloric effect of Pr2Fe17−x Mn x alloys. Rare Met. 33, 552–555 (2014). https://doi.org/10.1007/s12598-013-0134-x

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  • DOI: https://doi.org/10.1007/s12598-013-0134-x

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