Author/Authors :
Lashkarev، نويسنده , , G.V. and Slynko، نويسنده , , V.V. and Kovalyuk، نويسنده , , Z.D. and Sichkovskyi، نويسنده , , V.I. and Radchenko، نويسنده , , M.V. and Aleshkevych، نويسنده , , P. and Szymczak، نويسنده , , R. and Dobrowolski، نويسنده , , W. and Minikaev، نويسنده , , R. and Zaslonkin، نويسنده , , A.V.، نويسنده ,
Abstract :
Static magnetic susceptibility and ESR spectra of layered semiconducting InSe crystals containing Mn were investigated. Solid solution In1−XMnXSe is responsible for ferromagnetism at Curie temperature TC > 270 K. Single wide line ESR spectrum was observed. It practically disappeared at 90 K. Paramagnetic constant background of magnetic susceptibility originates from atypical Van-Vleck Mn3+ (d4) ions, which are in a state of nonmagnetic singlet in crystal field, and magnetization of crystals in ferromagnetic state. Very narrow (2 Oe) line with g = 1.999 appears at temperatures lower than 23 K which is apparently due to the electrons localized on the levels of space quantization. Two maxima at ∼ 160 K and ∼ 260 K are observed as the temperature dependence of magnetic susceptibility. They are obliged to inclusions of antiferromagnetic MnSe. At high magnetic fields of 6 and 50 kOe, the first peak widens and disappears.
Keywords :
Diluted magnetic semiconductors , Ferromagnetic semiconductors , magnetic susceptibility , ESR spectrum
