Magnetic phase transitions in ferrimagnetic DyFe.sub.5./sub.Al.sub.7./sub. near the compensation point

0431655 - FZÚ 2015 RIV RU eng J - Článek v odborném periodiku
Mushnikov, N. V. - Rozenfeld, E.V. - Gorbunov, Denis - Andreev, Alexander V.
Magnetic phase transitions in ferrimagnetic DyFe₅Al₇ near the compensation point.
Physics of Metals and Metallography. Roč. 115, č. 3 (2014), s. 257-267. ISSN 0031-918X. E-ISSN 1555-6190
Grant CEP: GA ČR GAP204/12/0150
Institucionální podpora: RVO:68378271
Klíčová slova: rare-earth intermetallic compounds * ferrimagnetism * compensation temperature * magnetic anisotropy * magnetic phase transition
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 0.761, rok: 2014

Magnetization curves of DyFe5Al7 single crystal were measured along the main axes. Temperature dependences of magnetic moments of the Dy and Fe sublattices and parameter of intersublattice exchange were determined in the model of molecular field. Magnetization jumps, whose values and critical fields strongly depend on temperature, are revealed along the easy axis near magnetic compensation temperature. A model of the magnetization of a ferrimagnet with two magnetic sublattices coupled by weak intersublattice exchange has been suggested. Using this model, analytical expressions for the magnetization curve and critical field of the spin-reorientation transition have been obtained. A magnetic phase diagram has been constructed and magnetic structures that are realized in different fields at different temperatures have been determined. The generalization of the model to the case of a noncollinear Fe sublattice has been generalized.
Trvalý link: http://hdl.handle.net/11104/0236250