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Large Magnetocaloric Effect in Fe-B-Mn-Zr-Nb Amorphous Alloys Near Room Temperature

  • G. F. Wang
  • H. L. Li
  • X. F. Zhang
  • Q. Ma
  • Y. L. Liu
  • Y. F. Li
  • Z. R. Zhao
Original Paper

Abstract

In this paper, we report on the magnetic and magnetocaloric properties in amorphous Fe 86−x B x Mn 4Zr 8Nb 2 (x = 4, 8, 12, 16 and 20) alloys. The Fe-based alloys were prepared by induction melting and melt-spinning techniques. The X-ray diffraction patterns indicate that the studied alloys are amorphous. With an increase of x from 4 to 20, the Curie temperature increases almost in a linear way from 237 to 328 K and the average saturation magnetic moment per Fe atom decreases monotonously. For a field change of 3 T, the absolute values of maximum isothermal entropy change \(\left | {\Delta S_{T}^{\max }} \right |\) are found to be 2.19, 1.97, 1.63, 1.58, and 1.38 J kg −1 K −1 at 237, 264, 289, 318, and 330 K for x = 4, 8, 12, 16, and 20, respectively. The large magnetocaloric effect near room temperature suggests that these Fe-based amorphous alloys can be considered as magnetic refrigerants in the range of 230–330 K. The ΔS T exhibits a potential law with a magnetic field exponent ∼0.72 at the Curie temperature. The similar values of n for Fe 86−x B x Mn 4Zr 8Nb 2 indicate that the ΔS T curves of these alloys follow a universal class.

Keywords

Amorphous alloys Magnetocaloric effect Curie temperature 

Notes

Acknowledgments

This work was financially supported by the Research Program of Science and Technology at Universities of Inner Mongolia Autonomous Region (No. NJZZ14159), the National Natural Science Foundation of China (Nos. 11564030 and 51571126), and the Natural Science Foundation of Inner Mongolia (Nos. 2013MS0111 and 2013MS0110).

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • G. F. Wang
    • 1
  • H. L. Li
    • 2
  • X. F. Zhang
    • 1
    • 2
  • Q. Ma
    • 2
  • Y. L. Liu
    • 2
  • Y. F. Li
    • 2
  • Z. R. Zhao
    • 2
  1. 1.Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal ResourcesInner Mongolia University of Science and TechnologyBaotouChina
  2. 2.School of Mathematics, Physics and Biological EngineeringInner Mongolia University of Science and TechnologyBaotouChina

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