Abstract
We have investigated the magnetic properties of a quaternary magnetic semiconductor Cd1‐x‐yMnxCryTe with a fixed Mn content x∼0.2 and varied Cr contents in the range of y = 0∼0.07. Ferromagnetic behaviors were observed in the films containing even a small amount of Cr less than 1%; hysteretic loops appear in the M‐H curves and the paramagnetic Curie temperature deduced from the fitting of Curie‐Weiss plot turns to be positive from a negative value in (Cd,Mn)Te. These results suggest that the interaction between Mn spins becomes ferromagnetic due to the presence of a small amount of Cr.
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