Anisotropic low field magnetoimpedance in (001) oriented La0.7Sr0.3MnO3 thin films

Joshi, RS and Sylvinson, Daniel MR and Kumar, Anil PS (2013) Anisotropic low field magnetoimpedance in (001) oriented La0.7Sr0.3MnO3 thin films. In: Journal of Applied Physics, 113 (17). 17C730_1-17C730_3.

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Abstract

We report the evidence for the anisotropic magnetoimpedance behavior in (001) oriented La0.7Sr0.3MnO3 (LSMO) thin films, in low frequency-low magnetic field regime. (001) oriented LSMO thin films were deposited using pulsed laser deposition and characterized with X-ray diffraction and temperature dependent magnetization studies. In the in-plain configuration, an ac magnetoresistance (MRac) of similar to -0.5% was observed at 1000 Oe, at 100 Hz frequency in these films. The MRac was found to decrease with increase in frequency. We observe increases in MRac at low frequency, indicating major contribution for change of permeability from domain wall motion. At higher frequencies, it decreases due to decrease in transverse permeability, resulting from dampening of domain wall motion. Out-of-plane configuration showed MRac similar to 5.5% at 1000 Oe, at 100 Hz frequency. The MRac turned from positive to negative with increase in frequency in out-of-plane configuration. These changes are attributed to the change in permeability of the film with the frequency and applied magnetic field.

Item Type:	Journal Article
Publication:	Journal of Applied Physics
Publisher:	American Institute of Physics
Additional Information:	Copyright of this article belongs to American Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	05 Jul 2013 05:58
Last Modified:	05 Jul 2013 05:58
URI:	http://eprints.iisc.ac.in/id/eprint/46791

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