Antiferromagnet-ferromagnet transition in α-MnxS manganese sulfides
Tóm tắt
Off-stoichiometric manganese monosulfides α-MnxS (1≤x≤1.25) are synthesized, and their crystal structure and magnetic properties are studied in the 4.2-to 300-K range. The compounds have a NaCl fcc lattice. Increasing the manganese ion concentration x in the antiferromagnetic semiconductors α-MnxS is found to result in concentration-(x
c
∼ 1.05) and temperature-driven (T
c
∼ 50 K) magnetic transitions from the antiferromagnetic to ferromagnetic state, with the cubic structure remaining unchanged.
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