Deviation from the Bloch law in ferromagnetic materials with an intermediate valence
Balaev A. D., Berzhanskii V. N., Val'kov V. V., Ovchinnikov S. G., Chernov V. K.
A term linear in temperature has been detected in ferromagnetic materials CuCr2S4, Cd1_;tM;cCr2Se4 (M = In, Ag) in the variation of magnetization in the spin-wave region. Such a deviation from the Bloch law is accounted for by the intermediate valence of chromium ions.