Magnetocaloric properties of (MnFe)2PGe and (MnFe)2PSi compounds fabricated by a melting method

Masahiro Hirashima; Hirofumi Wada

doi:10.1063/1.4961337

Magnetocaloric properties of (MnFe)₂PGe and (MnFe)₂PSi compounds fabricated by a melting method

Masahiro Hirashima, Hirofumi Wada

Condensed Matter Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Citations (Scopus)

Abstract

The compounds (MnFe)₂PGe and (MnFe)₂PSi are known to exhibit giant magnetocaloric effects due to a first-order magnetic transition (FOMT) near room temperature. These materials are usually prepared by a solid-phase reaction method, so that they are porous and brittle. In this study, we have fabricated (MnFe)₂PGe and (MnFe)₂PSi compounds by melting as-sintered compounds and examined structural and magnetic properties. It is found that for both compounds, the crystal structure is unchanged by melting. As-sintered samples undergo a sharp FOMT, while the samples after melting exhibit a broad magnetic transition. On the other hand, a sharp FOMT recovers by post-annealing. The origins of disappearance and recovery of the FOMT will be discussed.

Original language	English
Title of host publication	Frontiers in Materials Science, FMS 2015
Subtitle of host publication	Proceedings of the 2nd International Symposium on Frontiers in Materials Science
Editors	Masato Yoshiya, Nam-Nhat Hoang, Markus Munzenberg, Tomoyuki Yamamoto
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735414211
DOIs	https://doi.org/10.1063/1.4961337
Publication status	Published - Aug 26 2016
Event	2nd International Symposium on Frontiers in Materials Science, FMS 2015 - Tokyo, Japan Duration: Nov 19 2015 → Nov 21 2015

Publication series

Name	AIP Conference Proceedings
Volume	1763
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	2nd International Symposium on Frontiers in Materials Science, FMS 2015
Country/Territory	Japan
City	Tokyo
Period	11/19/15 → 11/21/15

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1063/1.4961337

Cite this

Hirashima, M., & Wada, H. (2016). Magnetocaloric properties of (MnFe)₂PGe and (MnFe)₂PSi compounds fabricated by a melting method. In M. Yoshiya, N-N. Hoang, M. Munzenberg, & T. Yamamoto (Eds.), Frontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science [020004] (AIP Conference Proceedings; Vol. 1763). American Institute of Physics Inc.. https://doi.org/10.1063/1.4961337

Magnetocaloric properties of (MnFe)₂PGe and (MnFe)₂PSi compounds fabricated by a melting method. / Hirashima, Masahiro; Wada, Hirofumi.

Frontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science. ed. / Masato Yoshiya; Nam-Nhat Hoang; Markus Munzenberg; Tomoyuki Yamamoto. American Institute of Physics Inc., 2016. 020004 (AIP Conference Proceedings; Vol. 1763).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hirashima, M & Wada, H 2016, Magnetocaloric properties of (MnFe)₂PGe and (MnFe)₂PSi compounds fabricated by a melting method. in M Yoshiya, N-N Hoang, M Munzenberg & T Yamamoto (eds), Frontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science., 020004, AIP Conference Proceedings, vol. 1763, American Institute of Physics Inc., 2nd International Symposium on Frontiers in Materials Science, FMS 2015, Tokyo, Japan, 11/19/15. https://doi.org/10.1063/1.4961337

Hirashima M, Wada H. Magnetocaloric properties of (MnFe)₂PGe and (MnFe)₂PSi compounds fabricated by a melting method. In Yoshiya M, Hoang N-N, Munzenberg M, Yamamoto T, editors, Frontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science. American Institute of Physics Inc. 2016. 020004. (AIP Conference Proceedings). doi: 10.1063/1.4961337

Hirashima, Masahiro ; Wada, Hirofumi. / Magnetocaloric properties of (MnFe)₂PGe and (MnFe)₂PSi compounds fabricated by a melting method. Frontiers in Materials Science, FMS 2015: Proceedings of the 2nd International Symposium on Frontiers in Materials Science. editor / Masato Yoshiya ; Nam-Nhat Hoang ; Markus Munzenberg ; Tomoyuki Yamamoto. American Institute of Physics Inc., 2016. (AIP Conference Proceedings).

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abstract = "The compounds (MnFe)2PGe and (MnFe)2PSi are known to exhibit giant magnetocaloric effects due to a first-order magnetic transition (FOMT) near room temperature. These materials are usually prepared by a solid-phase reaction method, so that they are porous and brittle. In this study, we have fabricated (MnFe)2PGe and (MnFe)2PSi compounds by melting as-sintered compounds and examined structural and magnetic properties. It is found that for both compounds, the crystal structure is unchanged by melting. As-sintered samples undergo a sharp FOMT, while the samples after melting exhibit a broad magnetic transition. On the other hand, a sharp FOMT recovers by post-annealing. The origins of disappearance and recovery of the FOMT will be discussed.",

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N2 - The compounds (MnFe)2PGe and (MnFe)2PSi are known to exhibit giant magnetocaloric effects due to a first-order magnetic transition (FOMT) near room temperature. These materials are usually prepared by a solid-phase reaction method, so that they are porous and brittle. In this study, we have fabricated (MnFe)2PGe and (MnFe)2PSi compounds by melting as-sintered compounds and examined structural and magnetic properties. It is found that for both compounds, the crystal structure is unchanged by melting. As-sintered samples undergo a sharp FOMT, while the samples after melting exhibit a broad magnetic transition. On the other hand, a sharp FOMT recovers by post-annealing. The origins of disappearance and recovery of the FOMT will be discussed.

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