Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers

J. Stahn; J. Chakhalian; Ch Niedermayer; J. Hoppler; T. Gutberlet; J. Voigt; F. Treubel; H. U. Habermeier; G. Cristiani; B. Keimer; C. Bernhard

doi:10.1103/PhysRevB.71.140509

Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers

J. Stahn, J. Chakhalian, Ch Niedermayer, J. Hoppler, T. Gutberlet, J. Voigt, F. Treubel, H. U. Habermeier, G. Cristiani, B. Keimer, C. Bernhard

School of Arts and Sciences, Physics & Astronomy

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

130 Scopus citations

Abstract

Multilayers of superconducting/ferromagnetic (SC/FM) YBa2 Cu3 O7 La2 3 Ca1 3 MnO3 have been studied by neutron reflectometry. The occurrence of a structurally forbidden Bragg peak in the FM state highlights a significant difference between the nuclear and magnetic depth profiles. From comparison with simulated reflectivity curves we identify two possible magnetization profiles: (i) a magnetic moment within the SC layer antiparallel to the one in the FM layer (antiphase magnetic proximity effect) or (ii) a "dead" region in the FM layer with zero net magnetic moment. In addition, we observe an anomalous enhancement of the off-specular reflection in the SC state which signals a strong mutual interaction between SC and FM order parameters.

Original language	English (US)
Article number	140509
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.71.140509
State	Published - 2005

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.71.140509

Cite this

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title = "Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers",

abstract = "Multilayers of superconducting/ferromagnetic (SC/FM) YBa2 Cu3 O7 La2 3 Ca1 3 MnO3 have been studied by neutron reflectometry. The occurrence of a structurally forbidden Bragg peak in the FM state highlights a significant difference between the nuclear and magnetic depth profiles. From comparison with simulated reflectivity curves we identify two possible magnetization profiles: (i) a magnetic moment within the SC layer antiparallel to the one in the FM layer (antiphase magnetic proximity effect) or (ii) a {"}dead{"} region in the FM layer with zero net magnetic moment. In addition, we observe an anomalous enhancement of the off-specular reflection in the SC state which signals a strong mutual interaction between SC and FM order parameters.",

author = "J. Stahn and J. Chakhalian and Ch Niedermayer and J. Hoppler and T. Gutberlet and J. Voigt and F. Treubel and Habermeier, {H. U.} and G. Cristiani and B. Keimer and C. Bernhard",

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doi = "10.1103/PhysRevB.71.140509",

language = "English (US)",

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T1 - Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers

AU - Stahn, J.

AU - Chakhalian, J.

AU - Niedermayer, Ch

AU - Hoppler, J.

AU - Gutberlet, T.

AU - Voigt, J.

AU - Treubel, F.

AU - Habermeier, H. U.

AU - Cristiani, G.

AU - Keimer, B.

AU - Bernhard, C.

PY - 2005

Y1 - 2005

N2 - Multilayers of superconducting/ferromagnetic (SC/FM) YBa2 Cu3 O7 La2 3 Ca1 3 MnO3 have been studied by neutron reflectometry. The occurrence of a structurally forbidden Bragg peak in the FM state highlights a significant difference between the nuclear and magnetic depth profiles. From comparison with simulated reflectivity curves we identify two possible magnetization profiles: (i) a magnetic moment within the SC layer antiparallel to the one in the FM layer (antiphase magnetic proximity effect) or (ii) a "dead" region in the FM layer with zero net magnetic moment. In addition, we observe an anomalous enhancement of the off-specular reflection in the SC state which signals a strong mutual interaction between SC and FM order parameters.

AB - Multilayers of superconducting/ferromagnetic (SC/FM) YBa2 Cu3 O7 La2 3 Ca1 3 MnO3 have been studied by neutron reflectometry. The occurrence of a structurally forbidden Bragg peak in the FM state highlights a significant difference between the nuclear and magnetic depth profiles. From comparison with simulated reflectivity curves we identify two possible magnetization profiles: (i) a magnetic moment within the SC layer antiparallel to the one in the FM layer (antiphase magnetic proximity effect) or (ii) a "dead" region in the FM layer with zero net magnetic moment. In addition, we observe an anomalous enhancement of the off-specular reflection in the SC state which signals a strong mutual interaction between SC and FM order parameters.

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Magnetic proximity effect in perovskite superconductor/ferromagnet multilayers

Abstract

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