Suppressed magnetization in La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices

A. Hoffmann; S. G.E. Te Velthuis; Z. Sefrioui; J. Santamaría; M. R. Fitzsimmons; S. Park; M. Varela

doi:10.1103/PhysRevB.72.140407

Suppressed magnetization in La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices

A. Hoffmann
, S. G.E. Te Velthuis
, Z. Sefrioui
, J. Santamaría
, M. R. Fitzsimmons
, S. Park
, M. Varela

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

Abstract

We studied the magnetic properties of La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices. Magnetometry showed that with increasing YBa2Cu3O7-δ layer thickness the saturation magnetization per La0.7Ca0.3MnO3 layer decreases. From polarized neutron reflectometry we determined that this magnetization reduction is due to an inhomogenous magnetization depth profile arising from the suppression of magnetization near the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface. Electron energy loss spectroscopy indicates an increased 3d band occupation of the Mn atoms in the La0.7Ca0.3MnO3 layers at the interface. Thus, the suppression of ferromagnetic order at the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface is most likely due to charge transfer between the two materials.

Original language	English (US)
Article number	140407
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.72.140407
State	Published - Oct 1 2005
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.72.140407

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title = "Suppressed magnetization in La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices",

abstract = "We studied the magnetic properties of La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices. Magnetometry showed that with increasing YBa2Cu3O7-δ layer thickness the saturation magnetization per La0.7Ca0.3MnO3 layer decreases. From polarized neutron reflectometry we determined that this magnetization reduction is due to an inhomogenous magnetization depth profile arising from the suppression of magnetization near the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface. Electron energy loss spectroscopy indicates an increased 3d band occupation of the Mn atoms in the La0.7Ca0.3MnO3 layers at the interface. Thus, the suppression of ferromagnetic order at the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface is most likely due to charge transfer between the two materials.",

author = "A. Hoffmann and \{Te Velthuis\}, \{S. G.E.\} and Z. Sefrioui and J. Santamar{\'i}a and Fitzsimmons, \{M. R.\} and S. Park and M. Varela",

year = "2005",

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doi = "10.1103/PhysRevB.72.140407",

language = "English (US)",

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T1 - Suppressed magnetization in La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices

AU - Hoffmann, A.

AU - Te Velthuis, S. G.E.

AU - Sefrioui, Z.

AU - Santamaría, J.

AU - Fitzsimmons, M. R.

AU - Park, S.

AU - Varela, M.

PY - 2005/10/1

Y1 - 2005/10/1

N2 - We studied the magnetic properties of La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices. Magnetometry showed that with increasing YBa2Cu3O7-δ layer thickness the saturation magnetization per La0.7Ca0.3MnO3 layer decreases. From polarized neutron reflectometry we determined that this magnetization reduction is due to an inhomogenous magnetization depth profile arising from the suppression of magnetization near the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface. Electron energy loss spectroscopy indicates an increased 3d band occupation of the Mn atoms in the La0.7Ca0.3MnO3 layers at the interface. Thus, the suppression of ferromagnetic order at the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface is most likely due to charge transfer between the two materials.

AB - We studied the magnetic properties of La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices. Magnetometry showed that with increasing YBa2Cu3O7-δ layer thickness the saturation magnetization per La0.7Ca0.3MnO3 layer decreases. From polarized neutron reflectometry we determined that this magnetization reduction is due to an inhomogenous magnetization depth profile arising from the suppression of magnetization near the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface. Electron energy loss spectroscopy indicates an increased 3d band occupation of the Mn atoms in the La0.7Ca0.3MnO3 layers at the interface. Thus, the suppression of ferromagnetic order at the La0.7Ca0.3MnO3 YBa2Cu3O7-δ interface is most likely due to charge transfer between the two materials.

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DO - 10.1103/PhysRevB.72.140407

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VL - 72

JO - Physical Review B - Condensed Matter and Materials Physics

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ER -

Suppressed magnetization in La0.7Ca0.3MnO3 YBa2Cu3O7-δ superlattices

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