Spin injection in perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers in magnetic fields

J. Z. Liu; T. Nojima; T. Nishizaki; N. Kobayashi

doi:10.1016/S0921-4534(01)00568-8

Spin injection in perovskite YBa₂Cu₃O₇/La_0.7Ca_0.3 MnO₃ double layers and YBa₂Cu₃O₇/SrTiO₃/ La_0.7Ca_0.3MnO₃ trilayers in magnetic fields

J. Z. Liu, T. Nojima, T. Nishizaki, N. Kobayashi

Institute for Materials Research (IMR) (institute affiliation only)

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

5 Citations (Scopus)

Abstract

Oxide heterostructures of perovskite YBa₂Cu₃O₇/La_0.7Ca_0.3 MnO₃ double layers and YBa₂Cu₃O₇/SrTiO₃/ La_0.7Ca_0.3MnO₃ trilayers were made to study quasiparticle injection effects in high-T_c superconducting thin films. Transport measurements of the superconducting layer shows that the insulating layer between YBa₂Cu₃O₇ and La_0.7Ca_0.3MnO₃ is important for the spin injection effect. It is found that spin injection effect differs with different injection configurations and it becomes strong with decreasing temperature. Magnetic field was harmful to the spin injection effect. The effect becomes weak with the increasing of magnetic field. It even disappears at high temperature in high magnetic fields. These results can give a useful information to the application of a variety of high-T_c superconductor/ferromagnetic heterostructure based devices.

Original language	English
Pages (from-to)	1614-1617
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	357-360
DOIs	https://doi.org/10.1016/S0921-4534(01)00568-8
Publication status	Published - 2001

Keywords

Heterostructure
High-T superconductors
Magnetic field
Spin injection

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Spin injection in perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers in magnetic fields",

abstract = "Oxide heterostructures of perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers were made to study quasiparticle injection effects in high-Tc superconducting thin films. Transport measurements of the superconducting layer shows that the insulating layer between YBa2Cu3O7 and La0.7Ca0.3MnO3 is important for the spin injection effect. It is found that spin injection effect differs with different injection configurations and it becomes strong with decreasing temperature. Magnetic field was harmful to the spin injection effect. The effect becomes weak with the increasing of magnetic field. It even disappears at high temperature in high magnetic fields. These results can give a useful information to the application of a variety of high-Tc superconductor/ferromagnetic heterostructure based devices.",

keywords = "Heterostructure, High-T superconductors, Magnetic field, Spin injection",

author = "Liu, {J. Z.} and T. Nojima and T. Nishizaki and N. Kobayashi",

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T1 - Spin injection in perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers in magnetic fields

AU - Liu, J. Z.

AU - Nojima, T.

AU - Nishizaki, T.

AU - Kobayashi, N.

PY - 2001

Y1 - 2001

N2 - Oxide heterostructures of perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers were made to study quasiparticle injection effects in high-Tc superconducting thin films. Transport measurements of the superconducting layer shows that the insulating layer between YBa2Cu3O7 and La0.7Ca0.3MnO3 is important for the spin injection effect. It is found that spin injection effect differs with different injection configurations and it becomes strong with decreasing temperature. Magnetic field was harmful to the spin injection effect. The effect becomes weak with the increasing of magnetic field. It even disappears at high temperature in high magnetic fields. These results can give a useful information to the application of a variety of high-Tc superconductor/ferromagnetic heterostructure based devices.

AB - Oxide heterostructures of perovskite YBa2Cu3O7/La0.7Ca0.3 MnO3 double layers and YBa2Cu3O7/SrTiO3/ La0.7Ca0.3MnO3 trilayers were made to study quasiparticle injection effects in high-Tc superconducting thin films. Transport measurements of the superconducting layer shows that the insulating layer between YBa2Cu3O7 and La0.7Ca0.3MnO3 is important for the spin injection effect. It is found that spin injection effect differs with different injection configurations and it becomes strong with decreasing temperature. Magnetic field was harmful to the spin injection effect. The effect becomes weak with the increasing of magnetic field. It even disappears at high temperature in high magnetic fields. These results can give a useful information to the application of a variety of high-Tc superconductor/ferromagnetic heterostructure based devices.

KW - Heterostructure

KW - High-T superconductors

KW - Magnetic field

KW - Spin injection

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JO - Physica C: Superconductivity and its Applications

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