Magnetic coupling in La0.7Ca0.3MnO 3/YBa2Cu3O7/La0.7Ca 0.3MnO3 trilayers

N. M. Nemes; C. Visani; J. Garcia-Barriocanal; F. Y. Bruno; Z. Sefrioui; D. Arias; C. Leon; M. Garcia Hernandez; S. G E Te Velthuis; A. Hoffmann; J. Santamaria

doi:10.4028/www.scientific.net/DDF.289-292.303

Magnetic coupling in La_0.7Ca_0.3MnO ₃/YBa₂Cu₃O₇/La_0.7Ca _0.3MnO₃ trilayers

N. M. Nemes, C. Visani, J. Garcia-Barriocanal, F. Y. Bruno, Z. Sefrioui, D. Arias, C. Leon, M. Garcia Hernandez, S. G E Te Velthuis, A. Hoffmann, J. Santamaria

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Abstract

We report on the interplay between ferromagnetism and superconductivity in trilayers La_0.7Ca_0.3MnO₃/YBa₂Cu ₃O₇/La_0.7Ca_0.3MnO₃ 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 a 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.

Original language	English (US)
Title of host publication	Diffusion in Materials - DIMAT2008
Publisher	Trans Tech Publications Ltd
Pages	303-309
Number of pages	7
Volume	289-292
ISBN (Print)	3908451728, 9783908451723
DOIs	https://doi.org/10.4028/www.scientific.net/DDF.289-292.303
State	Published - 2009
Event	7th International Conference on Diffusion in Materials - Lanzarote, Spain Duration: Oct 28 2008 → Oct 31 2008

Other

Other	7th International Conference on Diffusion in Materials
Country/Territory	Spain
City	Lanzarote
Period	10/28/08 → 10/31/08

Keywords

Ferromagnetism
Interfaces of complex oxides
Superconductivity

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10.4028/www.scientific.net/DDF.289-292.303

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Nemes, N. M., Visani, C., Garcia-Barriocanal, J., Bruno, F. Y., Sefrioui, Z., Arias, D., Leon, C., Hernandez, M. G., Te Velthuis, S. G. E., Hoffmann, A., & Santamaria, J. (2009). Magnetic coupling in La_0.7Ca_0.3MnO ₃/YBa₂Cu₃O₇/La_0.7Ca _0.3MnO₃ trilayers. In Diffusion in Materials - DIMAT2008 (Vol. 289-292, pp. 303-309). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/DDF.289-292.303

Nemes, NM, Visani, C, Garcia-Barriocanal, J, Bruno, FY, Sefrioui, Z, Arias, D, Leon, C, Hernandez, MG, Te Velthuis, SGE, Hoffmann, A & Santamaria, J 2009, Magnetic coupling in La_0.7Ca_0.3MnO ₃/YBa₂Cu₃O₇/La_0.7Ca _0.3MnO₃ trilayers. in Diffusion in Materials - DIMAT2008. vol. 289-292, Trans Tech Publications Ltd, pp. 303-309, 7th International Conference on Diffusion in Materials, Lanzarote, Spain, 10/28/08. https://doi.org/10.4028/www.scientific.net/DDF.289-292.303

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AU - Garcia-Barriocanal, J.

AU - Bruno, F. Y.

AU - Sefrioui, Z.

AU - Arias, D.

AU - Leon, C.

AU - Hernandez, M. Garcia

AU - Te Velthuis, S. G E

AU - Hoffmann, A.

AU - Santamaria, J.

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N2 - We report on the interplay between ferromagnetism and superconductivity in trilayers La0.7Ca0.3MnO3/YBa2Cu 3O7/La0.7Ca0.3MnO3 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 a 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.

AB - We report on the interplay between ferromagnetism and superconductivity in trilayers La0.7Ca0.3MnO3/YBa2Cu 3O7/La0.7Ca0.3MnO3 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 a 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.

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KW - Interfaces of complex oxides

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