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Colossal Magnetoresistance in Thick La0.7Ca0.3MnO3 Films

Published online by Cambridge University Press:  15 February 2011

Randolph E. Treece ,
P. Dorsey ,
M. Rubinstein ,
J. M. Byers ,
J. S. Horwitz ,
E. Donovan  and
D. B. Chrisey
Randolph E. Treece
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
P. Dorsey
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
M. Rubinstein
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
J. M. Byers
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
J. S. Horwitz
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
E. Donovan
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
D. B. Chrisey
Affiliation:
Naval Research Laboratory, Washington, DC 20375.
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Abstract

Thick films (0.6 and 2.0 μm) of the colossal magnetoresistance (CMR) material, La0.7Ca0.3MnO3 (LCMO), have been grown by pulsed laser deposition (PLD). The films were grown from single-phase LCMO targets in 100 mTorr 02 pressures and the material deposited on (100) LaAlO3 substrates at deposition temperatures of 800°C. The deposited films were characterized by X-ray diffraction (XRD), magnetic field-dependent resistivity, and Rutherford backscattering spectroscopy (RBS). The LCMO films were shown by XRD to adopt an orthorhombic structure. Brief post-deposition annealing led to ~50,000% and ~12,000% MR effect in the 0.6 μm and 2.0 μm films, respectively.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 384: Symposium L – Magnetic Ultrathin films, Multilayers and Surfaces , 1995 , 427
Copyright
Copyright © Materials Research Society 1995

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References

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