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The effect of hydrogenation on the magnetocaloric properties of medium-entropy Gd0.33Dy0.33Y0.33Ni alloyстатья Исследовательская статья
- Авторы: Kurganskaya A.A., Liu Zh, Kozlyakova E.S., Kaminskaya T.P., Tereshina I.S., Verbetsky V.N., Mitrokhin S.V., Vasiliev A.N.
- Журнал: Journal of Magnetism and Magnetic Materials
- Том: 627
- Год издания: 2025
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 173108
- DOI: 10.1016/j.jmmm.2025.173108
- Аннотация: ISSN 0304-8853,https://doi.org/10.1016/j.jmmm.2025.173108.(https://www.sciencedirect.com/science/article/pii/S0304885325003403)Abstract: We report a systematic investigation of the magnetic and magnetocaloric properties of the medium-entropy rare earth intermetallic compound Gd0.33Dy0.33Y0.33Ni and its hydride Gd0.33Dy0.33Y0.33NiH3 in applied magnetic fields up to 7 T. The parent compound crystallizes in an orthorhombic FeB-type structure (space group Pnma, #62) at room temperature and exhibits ferromagnetic ordering at TC ≈ 60 K. Upon hydrogenation, the crystal structure transforms to the CrB-type (space group Pnma, #62) with a reduced ferromagnetic transition temperature of TC ≈ 6 K. The Curie temperatures were determined through complementary methods: analysis of magnetization derivative (dM/dT) and Belov-Arrott plots. Isothermal magnetization measurements in the temperature range 2–90 K reveal a significant enhancement of the magnetocaloric effect (MCE) upon hydrogenation, with the maximum isothermal magnetic entropy change (ΔSm) increasing from 8.3 J/(kg·K) to 13 J/(kg·K) at μ0ΔH = 5 T near their respective TC. Detailed analysis using multiple criteria (Banerjee criterion, Oesterreicher-Parker method, and field-dependence of ΔSm) consistently indicates second-order magnetic phase transitions in both compounds. A comparative analysis with binary and pseudobinary analogues demonstrates unique features of the medium-entropy system, particularly in the low-field magnetocaloric response.
- Добавил в систему: Курганская Анастасия Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Текст статьи | Gd0.33Dy0.33Y0.33NiH3_JMMM.pdf | 6,2 МБ | 2 мая 2025 [AAKurganskaya] |
| 2. | Экспертное заключение | Adobe_Scan_17_Feb_2025.pdf | 394,9 КБ | 2 мая 2025 [AAKurganskaya] | |
| 3. | Экспертное заключение Хим 29.01.20245 | Expert_JMMM.pdf | 118,5 КБ | 5 мая 2025 [dynmos] |