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Singularities of magnetic properties of doped CdCr2Se4 single crystals in the region of the Curie pointстатья
- Авторы: Belov K.P., Koroleva L.I., Shalimova M.A., Kalinnikov V.T., Aminov T.G.
- Журнал: Soviet Journal of Experimental and Theoretical Physics
- Том: 45
- Номер: 5
- Год издания: 1977
- Первая страница: 1047
- Последняя страница: 1050
- Аннотация: The dependence of the magnetization sigma on the temperature T and on the magnetic field H was investigated in CdCr2Se4 single crystals doped with indium or copper and also having a selenium deficiency, in the region of the Curie point T_c and somewhat above it. The sigma(H) curves at temperatures slightly exceeding T_c have a critical field in whose vicinity the magnetization increases jumpwise by 80%. In the same temperature region, a temperature hysteresis of sigma was also observed. Annealing of a selenium-deficient sample in a selenium atmosphere decreases greatly the jump on the sigma(H) curves and narrows down the temperature hysteresis. The indicated experimental facts can be attributed to the production of ferrons under the influence of the magnetic field at temperatures above T_c.The field induced transition from the paramagnetic state to the ferron-containing state is an analog of a first-order phase transition.
- Добавил в систему: Королёва Людмила Ивановна