Fabrication of La0.7Sr0.3MnO3/La0.5Sr0.5CoO3/ La0.7Sr0.3MnO3 heterostructures for spin valve applications

Publication Type:

Conference Paper

Authors:

M.C. Robson; S.B. Ogale; R. Godfrey; T. Venkatesan; M. Johnson; Ramamoorthy Ramesh

Source:

Materials Research Society Symposium - Proceedings, MRS, Warrendale, PA, United States, Volume 494, p.243-248 (1997)

Keywords:

Epitaxial growth, Ferromagnetic materials, Heterojunctions, lanthanum compounds, Magnetic field effects, Magnetic field measurement, Magnetic hysteresis, Magnetization, manganese compounds, Perovskite, Spin valves, X ray diffraction analysis

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 non-magnetic 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.

Notes:

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