Caballero-Flores R., González-Legarreta L., Rosa W.O., Sánchez T., Prida V.M., Escoda L.l., Suñol J.J., Batdalov A.B., Aliev A.M., Koledov V.V., Shavrov V.G., Hernando B. Magnetocaloric effect, magnetostructural and magnetic phase transformations in Ni50.3Mn36.5Sn13.2 Heusler alloy ribbons. Journal of Alloys and Compounds , 2015 , 629. С. 332-342. ISSN 09258388
Полный текст не доступен из этого репозитория.Аннотация
Thermomagnetic properties and magnetocaloric effect (MCE) in Ni50.3Mn36.5Sn13.2 Heusler alloy ribbons are reported. Large magnetocaloric response has been obtained for μ0H = 3 T in both the reversible adiabatic change in temperature ΔTad (−6.3 and +4.7 K) and the isothermal change in the total entropy ΔST (+11.8 and −2.2 J K−1 kg−1), respectively at the temperature Tstr = 271 K at which the magnetostructural phase transition from the low-temperature Martensite phase (MP) to the high-temperature Austenite phase (AP) takes place, and at TCA = 311 K at which the magnetic phase transition in the AP occurs. The MCE has been studied through the Stoner’s magnetocaloric parameter ξS (Stoner EC. Phil Mag 19 (1935) 565), and a generalized expression for the equations of state for magnetic materials is presented. The phase coexistence of the MP and AP has been studied via their respective sublattice with opposite-aligned magnetic moments by means of the effective magnetic anisotropy density eA induced by the supercooled (superheated) secondary AP (MP) in the MP (AP). Magnetic fields higher than the critical value of μ0HR = 0.5 T produce alignment of the two magnetic moments and hence a change in the magnetic ordering in the MP from antiferromagnetic to ferromagnetic, resulting in a thermomagnetic behavior in which the field-cooling and field-heating magnetizations become coincident, the induced anisotropy vanishes eA = 0 and the metastability disappears. New tentative methods to obtain the spontaneous magnetization of both MP and AP and their respective fractions in the phase coexistence range are reported.
| Тип объекта: | Статья |
|---|---|
| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Кабаллеро-Флорес Р., Гонзалес-Лагаррета Л., Роза В., Санчез Т., Прида В.М., Эскода Д.И., Сунол Ж.Ж., Батдалов А.Б., Алиев А.М., Коледов В.В., Шавров В.Г., Хернандо Б. |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 192 лаб. магнитных явлений в микроэлектронике |
| URI: | http://cplire.ru:8080/id/eprint/1798 |
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