Effect of ``dipolar-biasing'' on the tunability of tunneling magnetoresistance in transition metal oxide systems

Kumar, Anil P and Sarma, DD (2012) Effect of ``dipolar-biasing'' on the tunability of tunneling magnetoresistance in transition metal oxide systems. In: APPLIED PHYSICS LETTERS, 100 (26).

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Abstract

We observe an unusual tunneling magnetoresistance (TMR) phenomenon in a composite of La2/3Sr1/3MnO3 with CoFe2O4 where the TMR versus applied magnetic field loop suggests a ``negative coercive field.'' Tracing its origin back to a ``dipolar-biasing'' of La2/3Sr1/3MnO3 by CoFe2O4, we show that the TMR of even a single composite can be tuned continuously so that the resistance peak or the highest sensitivity of the TMR can be positioned anywhere on the magnetic field axis with a suitable magnetic history of the sample. This phenomenon of an unprecedented tunability of the TMR should be present in general in all such composites. (C) 2012 American Institute of Physics.http://dx.doi.org/10.1063/1.4731206]

Item Type:	Journal Article
Publication:	APPLIED PHYSICS LETTERS
Publisher:	AMER INST PHYSICS
Additional Information:	Copyright for this article belongs to the American Inst of Physics
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	01 Aug 2012 11:15
Last Modified:	01 Aug 2012 11:15
URI:	http://eprints.iisc.ac.in/id/eprint/44894

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