Nguyen Hai Yen, Nguyen Thi Mai, Vu Manh Quang, Pham Thi Thanh, Tran Dang Thanh, Nguyen Huu Duc, Nguyen Le Thi, Nguyen Hoang Ha, Koledov V. V., Kamantsev A. P., Mashirov A. V., Nguyen Huy Dan Influence of Al on structure, magnetic properties and magnetocaloric effect of Ni50Mn37−xAlxSn13 ribbons. Advances in Natural Sciences: Nanoscience and Nanotechnology , 2018 , 9 (2). 025007. ISSN 2043-6262
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Аннотация
Influence of Al-concentration on structure, magnetic properties and magnetocaloric effect of Ni50Mn37-xAlxSn13 (x = 2, 4, 6 and 8) rapidly quenched ribbons was investigated. X-ray diffraction analysis shows that the ribbons exhibit single phase with a L21-cubic structure. Curie temperature, TC, of the alloy is slightly increased with increasing Al-concentration. Specially, the sample with x = 2 has both the first- (FOPT) and second- (SOPT) order magnetic phase transitions. The reason for the FOPT in the alloy ribbons is due to existence of the structural transformation between martensitic and austenitic phases. The Ni50Mn35Al2Sn13 alloy owns both the positive and negative magnetocaloric effects with maximum magnetic entropy changes of -0.8 and 2.6 J · kg-1 · K-1 (in magnetic field change ΔH = 12 kOe), respectively. By using Arrott-Noakes and Kouvel-Fisher methods, the critical parameters of the alloy were determined to be close to those of the mean field theory of long-range ferromagnetic orders.
| Тип объекта: | Статья |
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| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Нгуен Х.Ю., Фам Т.Т., Тран Д.Т., Нгуен Х.Д., Ву М.К., Нгуен Л.Т., Нгуен Х.Х., Нгуен Т.М., Коледов В.В., Каманцев А.П., Маширов А.В. |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 192 лаб. магнитных явлений в микроэлектронике |
| URI: | http://cplire.ru:8080/id/eprint/7266 |
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