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

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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.

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Acknowledgement

The present work is supported by DARPA under contract no. N000149610770 and partly by the NSF-MRSEC under contract no. DMR-9632521.

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Authors and Affiliations

  1. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD, 20742, USA

    M. C. Robson, S. B. Ogale, R. Godfrey, T. Venkatesan & R. Ramesh

  2. Department of Electrical Engineering, University of Maryland, College Park, MD, 20742, USA

    T. Venkatesan

  3. Naval Research Laboratory, Washington, DC, 20375, USA

    M. Johnson

  4. Department of Nuclear and Materials Engineering, University of Maryland, College Park, MD, 20742, USA

    R. Ramesh

Authors
  1. M. C. Robson
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  2. S. B. Ogale
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  3. R. Godfrey
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  4. T. Venkatesan
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  5. M. Johnson
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  6. R. Ramesh
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Robson, M.C., Ogale, S.B., Godfrey, R. et al. Fabrication Of La0.7Sr0.3MnO3/La0.5Sr0.5CoO3/La0.7Sr0.3MnO3 Heterostructures for Spin Valve Applications. MRS Online Proceedings Library 494, 243–248 (1997). https://doi.org/10.1557/PROC-494-243

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  • DOI: https://doi.org/10.1557/PROC-494-243

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