Magnetism

Investigation of magnetic phase transitions in dilute copper ferrites

A. A. Opalenko, A. B. Korshak, L. G. Antoshina

Lomonosov Moscow State University

Abstract: Mössbauer spectra of copper ferrites CuGa$_x$Al$_{2x}$Fe$_{2-3x}$O$_4$ ($x$ = 0.3, 0.4, 0.5) have been measured at temperatures in the range from 90 to 295 K. The degree of disturbance of long-range magnetic order has been determined as a function of the temperature. The Curie temperature has been found for the composition with $x$ = 0.5, and the dependence of the Curie temperature on the concentration of the nonmagnetic impurity has been constructed.

Received: 29.03.2010
Accepted: 22.06.2010

 English version: Physics of the Solid State, 2011, 53:2, 337–340

Bibliographic databases:

•