학술논문
Study of the magnetic structure in the spinel oxides MnGa.sub.x Fe.sub.1- .sub.x CrO.sub.4 by neutron diffraction
Document Type
Author abstract
Source
Journal of Magnetism and Magnetic Materials. March, 2007, Vol. 310 Issue 2, pe968
Subject
Language
English
ISSN
0304-8853
Abstract
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jmmm.2006.10.950 Byline: A.K.M. Zakaria (a), M.A. Asgar (b), S.-G. Eriksson (c), F.U. Ahmed (a), S.M. Yunus (a) Keywords: Neutron diffraction; Spinel oxide; Magnetic structure; Ferrimagnetic; Spin clusters Abstract: Magnetic properties of the spinel system MnGa.sub.x Fe.sub.1- .sub.x CrO.sub.4 have been investigated using neutron diffraction (ND) technique in the temperature range 600K[greater than or equal to]T[greater than or equal to]10K. The distribution of the magnetic moments in the tetrahedral (A) and octahedral (B) sublattices and their ordering as a function of temperature and composition has been determined. Ferrimagnetic transition temperatures and spin compensation temperatures have been determined for all the specimens. The features observed in the ND results are explained in the light of competing inter and intra-sublattice exchange interactions. A diffuse signal was found to exist below the innermost Bragg reflection with a general increase with increasing compositions indicating the formation of short-range spin clusters. Author Affiliation: (a) Institute of Nuclear Science & Technology, Bangladesh Atomic Energy Commission, Dhaka 1000, Bangladesh (b) Department of Physics, Bangladesh University of Engineering & Technology, Dhaka 1000, Bangladesh (c) Studsvik Neutron Research Laboratory, Uppsala University, SE-611 82 Nykoping, Sweden