Effect of interface-induced exchange fields on cuprate-manganite spin switches

Yaohua Liu; C. Visani; N. M. Nemes; M. R. Fitzsimmons; L. Y. Zhu; J. Tornos; M. Garcia-Hernandez; M. Zhernenkov; A. Hoffmann; C. Leon; J. Santamaria; S. G.E. Te Velthuis

doi:10.1103/PhysRevLett.108.207205

Effect of interface-induced exchange fields on cuprate-manganite spin switches

Yaohua Liu, C. Visani, N. M. Nemes, M. R. Fitzsimmons, L. Y. Zhu, J. Tornos, M. Garcia-Hernandez, M. Zhernenkov, A. Hoffmann, C. Leon, J. Santamaria, S. G.E. Te Velthuis

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We examine the anomalous inverse spin switch behavior in La _0.7Ca _0.3MnO ₃(LCMO)/YBa ₂Cu ₃O _7-δ (YBCO)/LCMO trilayers by combined transport studies and polarized neutron reflectometry. Measuring magnetization profiles and magnetoresistance in an in-plane rotating magnetic field, we prove that, contrary to many accepted theoretical scenarios, the relative orientation between the two LCMO's magnetizations is not sufficient to determine the magnetoresistance. Rather the field dependence of magnetoresistance is explained by the interplay between the applied magnetic field and the (exponential tail of the) induced exchange field in YBCO, the latter originating from the electronic reconstruction at the LCMO/YBCO interfaces.

Original language	English
Article number	207205
Journal	Physical Review Letters
Volume	108
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.108.207205
State	Published - May 18 2012
Externally published	Yes

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title = "Effect of interface-induced exchange fields on cuprate-manganite spin switches",

abstract = "We examine the anomalous inverse spin switch behavior in La 0.7Ca 0.3MnO 3(LCMO)/YBa 2Cu 3O 7-δ (YBCO)/LCMO trilayers by combined transport studies and polarized neutron reflectometry. Measuring magnetization profiles and magnetoresistance in an in-plane rotating magnetic field, we prove that, contrary to many accepted theoretical scenarios, the relative orientation between the two LCMO's magnetizations is not sufficient to determine the magnetoresistance. Rather the field dependence of magnetoresistance is explained by the interplay between the applied magnetic field and the (exponential tail of the) induced exchange field in YBCO, the latter originating from the electronic reconstruction at the LCMO/YBCO interfaces.",

author = "Yaohua Liu and C. Visani and Nemes, {N. M.} and Fitzsimmons, {M. R.} and Zhu, {L. Y.} and J. Tornos and M. Garcia-Hernandez and M. Zhernenkov and A. Hoffmann and C. Leon and J. Santamaria and {Te Velthuis}, {S. G.E.}",

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doi = "10.1103/PhysRevLett.108.207205",

language = "English",

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T1 - Effect of interface-induced exchange fields on cuprate-manganite spin switches

AU - Liu, Yaohua

AU - Visani, C.

AU - Nemes, N. M.

AU - Fitzsimmons, M. R.

AU - Zhu, L. Y.

AU - Tornos, J.

AU - Garcia-Hernandez, M.

AU - Zhernenkov, M.

AU - Hoffmann, A.

AU - Leon, C.

AU - Santamaria, J.

AU - Te Velthuis, S. G.E.

PY - 2012/5/18

Y1 - 2012/5/18

N2 - We examine the anomalous inverse spin switch behavior in La 0.7Ca 0.3MnO 3(LCMO)/YBa 2Cu 3O 7-δ (YBCO)/LCMO trilayers by combined transport studies and polarized neutron reflectometry. Measuring magnetization profiles and magnetoresistance in an in-plane rotating magnetic field, we prove that, contrary to many accepted theoretical scenarios, the relative orientation between the two LCMO's magnetizations is not sufficient to determine the magnetoresistance. Rather the field dependence of magnetoresistance is explained by the interplay between the applied magnetic field and the (exponential tail of the) induced exchange field in YBCO, the latter originating from the electronic reconstruction at the LCMO/YBCO interfaces.

AB - We examine the anomalous inverse spin switch behavior in La 0.7Ca 0.3MnO 3(LCMO)/YBa 2Cu 3O 7-δ (YBCO)/LCMO trilayers by combined transport studies and polarized neutron reflectometry. Measuring magnetization profiles and magnetoresistance in an in-plane rotating magnetic field, we prove that, contrary to many accepted theoretical scenarios, the relative orientation between the two LCMO's magnetizations is not sufficient to determine the magnetoresistance. Rather the field dependence of magnetoresistance is explained by the interplay between the applied magnetic field and the (exponential tail of the) induced exchange field in YBCO, the latter originating from the electronic reconstruction at the LCMO/YBCO interfaces.

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VL - 108

JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Effect of interface-induced exchange fields on cuprate-manganite spin switches

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