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Giant magnetoresistance in epitaxial lanthanum manganite thin films

Hegde, MS and Sahana, M and Satyalakshmi, KM and Prasad, V and Subramanyam, SV (1996) Giant magnetoresistance in epitaxial lanthanum manganite thin films. In: Indian Journal of Pure & Applied Physics, 34 (9). pp. 674-680.

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Abstract

Magnetoresistance measurements on a variety of lanthanum manganite epitaxial films are reported here. While stoichiometric$La_{0.6}Pb_{0.4}MnO_3$ show 40% GMR at 300 K, an enhanced GMR up to 70% is observed in the case of oxygen deficient $La_{0.6}Pb_{0.4}MnO_{3-δ}$ (δ≈ 0.18) and $La_{0.6}Pb_{0.4}Mn_{1-x}Ti_xO_3$ (x≈0.03-0.07) thin films. Over 85% GMR is observed in the self-doped $La_{1-x}MnO_{3-δ}$ (x≈0.3, δ≈0.15) thin film. Magnetic/non-magnetic oxide multilayers of $(La_{0.6}Pb_{0.4}MnO_3)$30 $A/(La_{0.85}MnO_3)_{10} 30$ A show over 70% GMR at 280 K compared to only 38% GMR in $La_{0.6}Pb_{0.4}MnO_3$, single film at 280 K indicating that this system mimicks the GMR effect in $(Fe/Cr)_n$ metallic multilayers

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Council of Scientific Industrial Reserach.
Keywords: epitaxial layers;giant magnetoresistance;lanthanum compounds;lead compounds;magnetic multilayers;thin films
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 31 Aug 2007
Last Modified: 10 Jan 2012 06:54
URI: http://eprints.iisc.ernet.in/id/eprint/10813

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