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Reversible magnetocaloric effect and refrigeration capacity enhanced by two successive magnetic transitions in DyB2

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Abstract

A large and reversible magnetocaloric effect is found in the compound DyB2, which is associated with two successive magnetic transitions: a spin-reorientation-like transition followed by a ferromagnetic-paramagnetic transition. These two transitions appreciably enlarge the magnetic-refrigeration temperature window and yield a huge refrigeration capacity of 610 J kg−1, with a maximum magnetic entropy change −ΔSmax of 17 J kg−1K−1, at a magnetic-field change of 5 T. The corresponding values for low magnetic-field change of 2 T are 193 J kg−1 and 7.4 J kg−1K−1, respectively.

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Authors and Affiliations

  1. Shenyang National Laboratory for Materials Science, and International Center for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    Hui Meng, Bing Li, Zheng Han, YuQin Zhang, XianWei Wang & ZhiDong Zhang

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  1. Hui Meng
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  2. Bing Li
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  3. Zheng Han
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  4. YuQin Zhang
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  5. XianWei Wang
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  6. ZhiDong Zhang
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Correspondence to Hui Meng.

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Meng, H., Li, B., Han, Z. et al. Reversible magnetocaloric effect and refrigeration capacity enhanced by two successive magnetic transitions in DyB2. Sci. China Technol. Sci. 55, 501–504 (2012). https://doi.org/10.1007/s11431-011-4684-6

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  • DOI: https://doi.org/10.1007/s11431-011-4684-6

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