Adiabatic temperature change in ErAl2/metal PIT wires: A practical method for estimating the magnetocaloric response of magnetocaloric composites

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:513

Article

Yamamoto, Takafumi D.¹  Takeya, Hiroyuki¹  Terashima, Kensei¹  Iwasaki, Suguru²  de Castro, Pedro Baptista^1,3  Numazawa, Takenori¹  Takano, Yoshihiko^1,3 

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

[2] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010020, Japan

[3] Univ Tsukuba, Tsukuba, Ibaraki 3058577, Japan

关键词: Magnetocaloric effect;    Analytical technique;    Composites;    Powder-in-tube method;    Intermetallic compounds;   

DOI  :  10.1016/j.jmmm.2020.167207

来源: Elsevier

【 摘 要 】

We report the adiabatic temperature change in ErAl2 magnetocaloric wires fabricated by a powder-in-tube (PIT) process. The adiabatic temperature change of the PIT wires is found to be determined by not only the volume fraction of ErAl2 core but also the magnitude relationship between the specific heat of the ErAl2 core and the metal sheath. We propose a quantitative analysis method for calculating the temperature and core volume fraction dependence of adiabatic temperature change in the PIT wire, whose formula is applicable to also various magnetocaloric composites, useful to estimate the magnetocaloric response prior to fabrication.

【 授权许可】

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