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VOLUME 62 (1995) | ISSUE 8 | PAGE 620
Quantum temperature oscillations of the magnetization in the ferromagnetic semiconductor n-HgCr2Se4
A new quantum effect, predicted theoretically by V. V. Val'kov and S. G. Ovchinnikov [Sov. Phys. Solid State 23, 2032 (1981)], has been observed: temperature oscillations of the magnetization in a variable-valence system. The amplitude of the oscillations decreases with increasing temperature and decreasing field, just as in the de Haas-van Alphen effect. The effective mass is estimated as m* =0.01m0. © 1995 American Institute of Physics.