Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals
In: Solid State Communications, Jg. 158 (2013-03-22), S. 1-4
Online
academicJournal
Zugriff:
Abstract: We studied the magnetic property, heat capacity, and magnetocaloric effect of TmGa and HoGa single crystals. The observed magnetizations at three principal crystallographic axes display clear magnetic anisotropy, indicating an easy magnetic direction at the a-axis for TmGa and c-axis for HoGa. The measured specific heat of TmGa revealed the Curie temperature of 15K and spin-reorientation temperatures at about 12.5 and 3.0K respectively. Both samples exhibit giant reversible anisotropic magnetocaloric effect based on a second-order phase transition. Along the easy axis, the maximum value of magnetic entropy change for a magnetic field change of 0–5T reaches 26.1Jkg−1 K−1 at 15K and 14.9Jkg−1 K−1 at 65K for TmGa and HoGa, respectively. The corresponding relative cooling powers are achieved to be 468 and 924Jkg−1. These values suggest the possibility of using these materials in magnetic refrigeration applications. [Copyright &y& Elsevier]
| Titel: |
Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals
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| Autor/in / Beteiligte Person: | Gao, Tian ; Nishimura, Katsuhiko ; Matsumoto, Takashi ; Namiki, Takahiro ; Isikawa, Yosikazu |
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| Zeitschrift: | Solid State Communications, Jg. 158 (2013-03-22), S. 1-4 |
| Veröffentlichung: | 2013 |
| Medientyp: | academicJournal |
| ISSN: | 0038-1098 (print) |
| DOI: | 10.1016/j.ssc.2012.12.028 |
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