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arXiv · 1409.7250

Sign Reversal of anisotropic magnetoresistance in La0.7Ca0.3MnO3/STO ultrathin films

Himanshu Sharma·A. Tulapurkar·C. V. Tomy
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Abstract

We present the observation of strain induced sign reversal of anisotropic magnetoresistance (AMR) in LCMO (LCMO) ultrathin films (thickness 4 nm) deposited on STO (001) substrate (STO). We have also observed unusually large AMR in LCMO/STO thin films with thickness of 6 nm below but close to its Curie temperature (TC) which decrease as the film thickness increases. The sign reversal of AMR (with a maximum value of - 6) with magnetic field or temperature for the 4 nm thin film may be attributed to the increase in tensile strain in the plane of the thin film which in turn facilitates the rotation of the magnetization easy axis.

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Himanshu Sharma, A. Tulapurkar, C. V. Tomy. 2014-09-25. Sign Reversal of anisotropic magnetoresistance in La0.7Ca0.3MnO3/STO ultrathin films. https://doi.org/10.1063/1.4903236

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