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Mo2NiB2-type Sm2Co2Al and Sm2Co2Ga compounds: Magnetic properties and giant low-temperature coercivityстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 апреля 2018 г.
- Журнал: Journal of Solid State Chemistry
- Том: 260
- Год издания: 2018
- Издательство: Elsevier B.V.
- Местоположение издательства: Netherlands
- Первая страница: 95
- Последняя страница: 100
- DOI: 10.1016/j.jssc.2018.01.023
- Аннотация: The magnetic ordering of Mo2NiB2-type Sm2Co2Al and Sm2Co2Ga (Immm, No. 71, oI10) compounds has been established using bulk magnetic measurements. Polycrystalline Sm2Co2Al and Sm2Co2Ga undergo ferromagnetic transitions (TC) at 50 K and 62 K, respectively, and low-temperature field induced transitions (Tm) around 14 K and 16 K (in a field of 10 kOe), respectively. Between TC and Tm Sm2Co2Al and Sm2Co2Ga are soft ferromagnets. Below Tm Sm2Co2Al and Sm2Co2Ga exhibit permanent magnet properties with a residual magnetization per samarium of 0.38 mB and 0.36 mB, respectively, and a large coercive field of 69 kOe and 72 kOe, respectively, at 5 K. The magnetocaloric effects of Sm2Co2Al and Sm2Co2Ga were calculated in terms of isothermal magnetic entropy change and they reach maximum values of -1.62 J/kg*K and -1.31 J/kg*K for a field change of 50 kOe at 50 K and 58 K, respectively. Low temperature magnetic ordering with enhanced anisotropy in Sm2Co2Al and Sm2Co2Ga is accompanied by a positive magnetocaloric effect with isothermal magnetic entropy changes of +1.63 J/kg*K and +1.06 J/kg*K for a field change of 50 kOe at 10 K and 8 K, respectively.
- Добавил в систему: Морозкин Александр Владимирович