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Fabrication Of La0.7Sr0.3MnO3/La0.5Sr0.5CoO3/La0.7Sr0.3MnO3 Heterostructures for Spin Valve Applications

Published online by Cambridge University Press:  10 February 2011

M. C. Robson ,
S. B. Ogale ,
R. Godfrey ,
T. Venkatesan ,
M. Johnson  and
R. Ramesh
M. C. Robson
Affiliation:
Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742
S. B. Ogale
Affiliation:
Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742
R. Godfrey
Affiliation:
Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742
T. Venkatesan
Affiliation:
Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742 also Department of Electrical Engineering, University of Maryland, College Park, MD 20742
M. Johnson
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375
R. Ramesh
Affiliation:
Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742 also Department of Nuclear and Materials Engineering, University of Maryland, College Park, MD 20742
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Abstract

Epitaxial growth of oxide heterostructures, which may be utilized in spin valve applications, has been demonstrated. The heterostructures consist of two ferromagnetic layers separated by a nonmagnetic metallic interlayer. The ferromagnetic material used is the manganese perovskite oxide, La0.7Sr0.3MnO3, while the metallic oxide interlayer is La0.5Sr0.5CoO3. X-ray diffraction spectra demonstrate the high structural quality of the heterostructures. The magnetization of the heterostructure as a function of magnetic field measured at room temperature yields a double hysteresis loop that is characteristic of this type of spin valve structure. The behavior of this double hysteresis loop is also examined as a function of the metallic interlayer thickness.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 494: Symposium V – Science & Technology of Magnetic Oxides , 1997 , 243
Copyright
Copyright © Materials Research Society 1998

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References

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