Kamantsev Alexander P., Koledov Victor V., Mashirov Alexey V., Dilmieva Elvina T., Shavrov Vladimir G., Cwik Jacek, Los Anton S., Nizhankovskii Victor I., Rogacki Krzysztof, Tereshina Irina S., Koshkid'ko Yuriy S., Lyange Maria V., Khovaylo Vladimir V., Ari-Gur Pnina Magnetocaloric and thermomagnetic properties of Ni2.18Mn0.82Ga Heusler alloy in high magnetic fields up to 140 kOe. Journal of Applied Physics , 2015 , 117 (16). р. 163903. ISSN 0021-8979
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Аннотация
Measurements of the adiabatic temperature change (∆T) and the specific heat transfer (∆Q) of Ni2.18Mn0.82Ga Heusler alloy were taken in order to quantify the direct giant magnetocaloric effect (GMCE) of the alloy when it is in the vicinity of magneto-structural phase transition (PT) from paramagnetic austenite to ferromagnetic martensite, and their results presented. A new vacuum calorimeter was used to simultaneously measure ∆T and ∆Q of magnetocaloric materials with a Bitter coil magnet in fields of up to H = 140 kOe. Other thermomagnetic properties of this alloy were investigated using standard DSC and PPMS equipment. The maximal values of MCE in H = 140 kOe were found to be ∆T = 8.4 K at initial temperature 340 K and ∆Q = 4900 J/kg at 343 K. Using this direct method, we show that the alloy indeed demonstrates the largest value of ∆Q as compared with previously published results for direct measurements of magnetocaloric materials, even though at 140 kOe the magnetic field-induced magnetostructural PT is still not complete.
| Тип объекта: | Статья |
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| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Александр П. Каманцев, Виктор В. Коледов, Алексей В. Маширов, Эльвина Т. Дильмиева, Владимир Г. Шавров, Яцек Цвик, Антон С. Лось, Виктор И. Нижанковский, Кшиштоф Рогацкий, Ирина С. Терешина, Юрий С. Кошкидько, Мария В. Лянге, Владимир В. Ховайло, Пнина Ари-Гур |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 192 лаб. магнитных явлений в микроэлектронике |
| URI: | http://cplire.ru:8080/id/eprint/1070 |
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