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Title: Spin dependent magnetoresistance at ferromagnet/superconductor/ferromagnet La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7-delta}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} trilayers.

Abstract

We report on large magnetoresistance in ferromagnet/superconductor/ferromagnet trilayer structures made of La{sub 0.7}Ca{sub 0.3}MnO{sub 3} and YBa{sub 2}Cu{sub 3}O{sub 7}. We find that the shape and height of the magnetoresistance peaks are not modified when the relative orientation of current and magnetic field is changed from parallel to perpendicular. Furthermore, we find that the temperature shift of the resistance curves is independent of current and of the sweep rate of the magnetic field. These observations favor the view that the magnetoresistance phenomenon originates in the spin dependent transport of quasiparticles transmitted from the ferromagnetic electrodes into the superconductor, and rule out interpretations in terms of spontaneous vortices or anisotropic magnetoresistance of the ferromagnetic layers.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
940690
Report Number(s):
ANL/MSD/JA-57714
Journal ID: ISSN 1098-0121; TRN: US200824%%172
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. B; Journal Volume: 75; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; MAGNETORESISTANCE; FERROMAGNETIC MATERIALS; SUPERCONDUCTORS; COMPOSITE MATERIALS; LANTHANUM OXIDES; CALCIUM OXIDES; MANGANESE OXIDES; YTTRIUM OXIDES; BARIUM OXIDES; COPPER OXIDES

Citation Formats

Visani, C., Pena, V., Garcia-Barriocanal, J., Arias, D., Sefrioui, Z., Leon, C., Santamaria, J., Nemes, N. M., Garcia-Hernandez, M., Martinez, J. L., te Velthuis, S.G.E, Hoffmann, A., Materials Science Division, Univ. Complutense de Madrid, and Inst. de Ciencia de Materiales de Madrid. Spin dependent magnetoresistance at ferromagnet/superconductor/ferromagnet La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7-delta}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} trilayers.. United States: N. p., 2007. Web. doi:10.1103/PhysRevB.75.054501.
Visani, C., Pena, V., Garcia-Barriocanal, J., Arias, D., Sefrioui, Z., Leon, C., Santamaria, J., Nemes, N. M., Garcia-Hernandez, M., Martinez, J. L., te Velthuis, S.G.E, Hoffmann, A., Materials Science Division, Univ. Complutense de Madrid, & Inst. de Ciencia de Materiales de Madrid. Spin dependent magnetoresistance at ferromagnet/superconductor/ferromagnet La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7-delta}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} trilayers.. United States. doi:10.1103/PhysRevB.75.054501.
Visani, C., Pena, V., Garcia-Barriocanal, J., Arias, D., Sefrioui, Z., Leon, C., Santamaria, J., Nemes, N. M., Garcia-Hernandez, M., Martinez, J. L., te Velthuis, S.G.E, Hoffmann, A., Materials Science Division, Univ. Complutense de Madrid, and Inst. de Ciencia de Materiales de Madrid. Mon . "Spin dependent magnetoresistance at ferromagnet/superconductor/ferromagnet La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7-delta}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} trilayers.". United States. doi:10.1103/PhysRevB.75.054501.
@article{osti_940690,
title = {Spin dependent magnetoresistance at ferromagnet/superconductor/ferromagnet La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7-delta}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} trilayers.},
author = {Visani, C. and Pena, V. and Garcia-Barriocanal, J. and Arias, D. and Sefrioui, Z. and Leon, C. and Santamaria, J. and Nemes, N. M. and Garcia-Hernandez, M. and Martinez, J. L. and te Velthuis, S.G.E and Hoffmann, A. and Materials Science Division and Univ. Complutense de Madrid and Inst. de Ciencia de Materiales de Madrid},
abstractNote = {We report on large magnetoresistance in ferromagnet/superconductor/ferromagnet trilayer structures made of La{sub 0.7}Ca{sub 0.3}MnO{sub 3} and YBa{sub 2}Cu{sub 3}O{sub 7}. We find that the shape and height of the magnetoresistance peaks are not modified when the relative orientation of current and magnetic field is changed from parallel to perpendicular. Furthermore, we find that the temperature shift of the resistance curves is independent of current and of the sweep rate of the magnetic field. These observations favor the view that the magnetoresistance phenomenon originates in the spin dependent transport of quasiparticles transmitted from the ferromagnetic electrodes into the superconductor, and rule out interpretations in terms of spontaneous vortices or anisotropic magnetoresistance of the ferromagnetic layers.},
doi = {10.1103/PhysRevB.75.054501},
journal = {Phys. Rev. B},
number = 2007,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • We report a memory concept utilizing ferromagnet/superconductor/ferromagnet La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} thin film hybrid structures. The orientation of the magnetic field with respect to the ferromagnetic easy axis has a strong effect on superconductivity as indicated by a strong variation in the magnetoresistance (MR). MR can be controlled by rotating a small magnetic field applied in the plane of the film in a way that is determined by the in-plane biaxial magnetic anisotropy. The proposed memory device has the advantages of superconducting detection elements (fast response and low dissipation), small (100-150 Oe) writing fields,more » and resistance read-out without need for applied field.« less
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  • We report on the interplay between ferromagnetism and superconductivity in trilayers La{sub 0.7}Ca{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7}/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} made of half metallic manganite and high temperature superconductor cuprate. Samples with a fully oxygenated cuprate show a magnetic field interval where the magnetizations of the manganite are aligned antiparallel. A considerable magnetoresistance accompanies the switching between magnetization configurations (parallel vs. antiparallel) of the manganite moments. Suppression of the free carrier density of the cuprate which occurs upon oxygen depletion, results in deep modifications in the shape of the normal state hysteresis loops indicating that there may be amore » magnetic coupling mediated by free carrier density of the cuprate. This result outlines the importance of quasiparticle transmission in the interplay between ferromagnetism and superconductivity in this kind of samples.« less
  • We report large tunneling magnetoresistance in La{sub 0.7}Ca{sub 0.3}MnO{sub 3} (8 nm)/PrBa{sub 2}Cu{sub 3}O{sub 7} (2.4 nm)/La{sub 0.7}Ca{sub 0.3}MnO{sub 3} (50 nm) junctions. The coherent growth of the cuprate on the manganite allows the deposition of ultrathin barriers which are continuous and flat over long lateral distances. Epitaxial strain causes the top layer to be a weaker ferromagnet without a significant decrease in the spin polarization.
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