Short-range spin order and magnetic excitations in diluted magnetic semiconductor Zn0.568Mn0.432Te

The diluted magnetic semiconductor, Zn0.568Mn0.432Te, is studied by means o f neutron diffraction and cold neutron scattering below 100 K. Distribution of magnetic diffuse scattering intensity indicates the coexistence of two kinds of antiferromagnetic short-range orders, i.e. type-III and type-I in a face centered cubic Mn sublattice. The type-I short-range order component decreases below spinglass transition temperature, T-g = 17 K, by applying a magnetic field of 5 Tesla. We newly found a marked increase of quasi-elas tic scattering intensity at T-g and an unknown broad inelastic peak lying a round 1.0 meV at 14 K. (C) 1999 Elsevier Science Ltd. All rights reserved.