Giant magnetoresistance in La0.6Pb0.4Mn(1-x)TixO3 films: Enhancement of magnetoresistance due to Ti4+ substitution in Mn4+ sites

Sahana, M and Satyalakshmi, KM and Hegde, MS and Prasad, V and Subramanyam, SV (1997) Giant magnetoresistance in La0.6Pb0.4Mn(1-x)TixO3 films: Enhancement of magnetoresistance due to Ti4+ substitution in Mn4+ sites. In: Materials Research Bulletin, 32 (7). pp. 831-837. (In Press)

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Abstract

Nonmagnetic Ti4+ ion is substituted for Mn4+ in La0.6Pb0.4MnO3. The resulting La0.6Pb0.4Mn(1-x)TixO3 (0 less than or equal to x less than or equal to 0.3) crystallizes in rhombohedral structure. The insulator-to-metal transition temperature decreases from 320 K to 92 K as x is varied from 0 to 0.09. Epitaxial films for the compositions x = 0, 0.03, 0.05, and 0.07 are fabricated by pulsed-laser deposition. Magnetoresistance at 6 T is enhanced from 38% for x = 0 to 75% for x = 0.07. The presence of Ti4+ (d(0)) ion decreases the Mn-Mn interaction through oxygen and thereby affects the resistivity and magnetoresistance of La0.6Pb0.4MnO3.

Item Type:	Journal Article
Publication:	Materials Research Bulletin
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Oxides;electrical properties;magnetic properties.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Physical & Mathematical Sciences > Physics
Date Deposited:	23 Jul 2009 04:37
Last Modified:	19 Sep 2010 05:26
URI:	http://eprints.iisc.ac.in/id/eprint/19024

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