Magnetic entropy change of ErAl2 magnetocaloric wires fabricated by a powder-in-tube method

Hiroyuki Takeya; Kensei Terashima; Pedro Baptista de Castro; Suguru Iwasaki; Takafumi D. Yamamoto; Takenori Numazawa; Yoshihiko Takano

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Magnetic entropy change of ErAl2 magnetocaloric wires fabricated by a powder-in-tube method

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arxiv 2001.00174 v1 pith:FKSCW2UC submitted 2020-01-01 cond-mat.mtrl-sci

Takafumi D. Yamamoto , Hiroyuki Takeya , Suguru Iwasaki , Kensei Terashima , Pedro Baptista de Castro , Takenori Numazawa , Yoshihiko Takano This is my paper · ORCID

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keywords eral2magneticchangeentropywiresmagnetocaloricmethodpowder-in-tube

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We report the fabrication of ErAl2 magnetocaloric wires by a powder-in-tube method (PIT) and the evaluation of magnetic entropy change through magnetization measurements. The magnetic entropy change of ErAl2 PIT wires exhibits similar behavior to the bulk counterpart, while its magnitude is reduced by the decrease in the volume fraction of ErAl2 due to the surrounding non-magnetic sheaths. We find that another effect reduces the magnetic entropy change of the ErAl2 PIT wires around the Curie temperature, and discuss its possible origin in terms of a correlation between magnetic properties of ErAl2 and mechanical properties of sheath material.

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