Synthesis, structure and magnetic properties of Sr2Fe1-xGaxMoO6 (0 <= x <= 0.6) double perovskites
Artikel i vetenskaplig tidskrift, 2009

Polycrystalline Sr2Fe1-xGaxMoO6 (0 <= x <= 0.6) materials have been synthesized by solid state reaction method and studied by neutron powder diffraction (NPD) and magnetization measurements. Rietveld analysis of the temperature dependent NPD data shows that the compounds crystallize in the tetragonal symmetry in the space group 14/m. The anti-site (AS) defects concentration increases with Ga doping, giving rise to highly B-site disordered materials. Ga doping at the Fe-site decreases the cell volume. The evolution of bond lengths and the cation oxidation states was determined from the Rietveld refinement data. The saturation magnetization and Curie temperature decreased with the increasing Ga content in the samples. Low temperature neutron diffraction data analysis and magnetization measurements confirm the magnetic interaction as ferrimagnetic in the sample. (C) 2009 Elsevier Ltd. All rights reserved.

room-temperature

Chemical synthesis

Neutron diffraction

Magnetic properties

Oxides

Crystal structure

magnetoresistance

sr2femoo6

ba

curie-temperature

Författare

A. K. Azad

University of St Andrews

A. Khan

University of Balochistan

Sten Eriksson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

J. T. S. Irvine

University of St Andrews

Materials Research Bulletin

0025-5408 (ISSN)

Vol. 44 12 2181-2185

Ämneskategorier

Annan materialteknik

DOI

10.1016/j.materresbull.2009.08.012