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Metamagnetic transition in the system Eu1-xSrxMn0.5Co0.5O3 (0 <= x <= 0.75)статья
Статья опубликована в высокорейтинговом журнале
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 октября 2018 г.
- Авторы: Troyanchuk I.O., Bushinsky M.V., Tereshko N.V., Vasiliev A.N.
- Журнал: Journal of Alloys and Compounds
- Том: 764
- Год издания: 2018
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 359
- Последняя страница: 363
- DOI: 10.1016/j.jallcom.2018.06.050
- Аннотация: Magnetic properties of orthorhombic (space group Pnma) perovskite EuMn0.54+Co0.52+O3 synthesized at various temperatures are studied up to 140 kOe. The sample obtained at 1500 degrees C shows a metamagnetic behavior irreversible below 40 K, whereas the sample obtained at 1200 degrees C exhibits purely ferromagnetic behavior. Both samples are ordered at Curie temperature T-C = 123 K and reach equal magnetizations at high magnetic fields. The substitution of Eu3+ by Sr2+ within Eu1-xSrx Mn0.5Co0.5O3 series of compounds leads to the increase in T-C, but the magnetization of these compositions strongly decreases and the metamagnetic transition disappears at x > 0.3. The composition with x= 0.75 is a cubic (Pm (3) over bar) antiferromagnet with Neel temperature T-N approximate to 210 K. It is assumed that the metamagnetic transition is associated with a transition from a noncollinear into a collinear ferromagnetic phase. A noncollinear phase is formed due to the competition between positive Co2+ - Mn4+ and negative Mn4+ - Mn4+ and Co2+ - Co2+ superexchange interactions in the presence of large magnetic anisotropy. It is suggested that Sr2+ doping leads to formation of mixed high/low spin state of Co3+ ions and enforces antiferromagnetic component.
- Добавил в систему: Васильев Александр Николаевич