Magnetic and transport properties of La{sub 0.3}Ca{sub 0.7}Mn{sub 0.9}T{sub 0.1}O{sub 3} (T = Cr, Fe, and W)
- Department of Chemistry, Mahidol University, Rama VI Road, Bangkok 10400 (Thailand)
- Laboratoire de Physico-Chimie de l'Etat Solide, UMR8648 Universite Paris-Sud, 91405 Orsay (France)
We have carried out structural, magnetic and magneto transport measurements of the electron-doped manganite La{sub 0.3}Ca{sub 0.7}MnO{sub 3} substituted with 10% of Cr, Fe and W on the Mn site. The substitution by Cr, Fe and W suppresses the charge order transition present at 260 K in the parent compound. All the samples show a semiconducting behavior. Whereas the parent compound does not show any magneto resistance (MR) even in a field of 14 T, a maximum MR of 6% in 5 T at 25 K is observed for the Cr substituted sample that is attributed to a spin-cluster glass like states induced by Cr. The Fe and W substituted samples showed a MR of 1.5 and 3%, respectively which may be attributed to a smaller number of FM domains/spin-clusters and to an increase in anti-ferromagnetic interaction.
- OSTI ID:
- 20883098
- Journal Information:
- Materials Research Bulletin, Vol. 40, Issue 1; Other Information: DOI: 10.1016/j.materresbull.2004.09.012; PII: S0025-5408(04)00302-2; Copyright (c) 2004 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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