Structural and magnetic properties of LaFe{sub 0.5}Cr{sub 0.5}O{sub 3} studied by neutron diffraction, electron diffraction and magnetometry
- Studsvik Neutron Research Laboratory, Uppsala University, SE-611 82, Nykoeping (Sweden)
- Karpov Institute of Physical Chemistry, 10 105064 Moscow (Russian Federation)
- Institute of Nuclear Science and Technology, Bangladesh Atomic Energy Commission, G.P.O Box 3787, Dhaka 1000 (Bangladesh)
- Department of Structural Chemistry, Stockholm University, SE-10691 Stockholm (Sweden)
- Department of Materials Science, Uppsala University, Box 534, SE-75121 Uppsala (Sweden)
The structural and magnetic properties of the perovskite type compound LaFe{sub 0.5}Cr{sub 0.5}O{sub 3} have been studied by temperature dependent neutron powder diffraction and magnetization measurements. Rietveld refinement of the neutron diffraction data shows that the compound crystallizes in an orthorhombic perovskite structure with a random positioning of the Fe and Cr cations at the B sublattice. The magnetic structure at 10 K is a collinear antiferromagnetic one with the magnetic moment per site being equal to 2.79(4) {mu}{sub B}. Magnetisation measurements confirm the overall antiferromagnetic behaviour. Moreover, it indicates a weak uncompensated magnetic moment close to the transition temperature T {sub N} {approx} 265 K. This moment can be described by a magnetic cluster state, which remains up to 550 K. Electron diffraction patterns along with high-resolution transmission electron microscopy images reveal that the crystallites are composed by domains of different orientation, which share the same cubic perovskite sub-cell reflections.
- OSTI ID:
- 20888087
- Journal Information:
- Materials Research Bulletin, Vol. 40, Issue 10; Other Information: DOI: 10.1016/j.materresbull.2005.07.007; PII: S0025-5408(05)00246-1; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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