Abstract
We report magnetic, structural, and electrical properties of Cr-doped CdTe crystals grown by the vertical solidification method. High-resolution x-ray diffraction showed a single phase with a zinc-blende structure of lattice constant ∼6.481Å. It exhibited ferromagnetism with temperature-dependent magnetization. The ferromagnetic moment increased as the applied magnetic field increased in the field range of 100–2000Oe. The temperature dependence of resistance exhibited Efros-Shklovskii-type variable range hopping proportional to 1∕T1∕2. The appearance of ferromagnetism with a Curie temperature of ∼395K is explained by ferromagnetic interaction of Cr atoms dissolved in the CdTe matrix rather than intermetallic impurity phases.
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