Critical current control in a superconducting thin film with a ferromagnetic layer

MD Allsworth; Radoslav Chakalov; Pavlo Mikheenko; Mark Colclough; Christopher Muirhead

doi:10.1109/TASC.2003.812035

Critical current control in a superconducting thin film with a ferromagnetic layer

MD Allsworth, Radoslav Chakalov, Pavlo Mikheenko, Mark Colclough, Christopher Muirhead

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

We report suppression of the critical current of thin film Yba(2)Cu(3)O(7) layers by altering the magnetization of a ferromagnetic La0.67Ca0.33MnO3 overlayer. We provide evidence that the critical current suppression is related to the spin-polarized state of the magnetic layer, rather than a direct magnetic influence. We argue that the spin diffusion length in the superconducting layer is small compared with the typical domain size in the ferromagnetic layer in its demagnetized state.

Original language	English
Pages (from-to)	2849-2852
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	13
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2003.812035
Publication status	Published - 1 Jun 2003

Keywords

magnetic materials
superconducting devices

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10.1109/TASC.2003.812035

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abstract = "We report suppression of the critical current of thin film Yba(2)Cu(3)O(7) layers by altering the magnetization of a ferromagnetic La0.67Ca0.33MnO3 overlayer. We provide evidence that the critical current suppression is related to the spin-polarized state of the magnetic layer, rather than a direct magnetic influence. We argue that the spin diffusion length in the superconducting layer is small compared with the typical domain size in the ferromagnetic layer in its demagnetized state.",

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AU - Allsworth, MD

AU - Chakalov, Radoslav

AU - Mikheenko, Pavlo

AU - Colclough, Mark

AU - Muirhead, Christopher

PY - 2003/6/1

Y1 - 2003/6/1

N2 - We report suppression of the critical current of thin film Yba(2)Cu(3)O(7) layers by altering the magnetization of a ferromagnetic La0.67Ca0.33MnO3 overlayer. We provide evidence that the critical current suppression is related to the spin-polarized state of the magnetic layer, rather than a direct magnetic influence. We argue that the spin diffusion length in the superconducting layer is small compared with the typical domain size in the ferromagnetic layer in its demagnetized state.

AB - We report suppression of the critical current of thin film Yba(2)Cu(3)O(7) layers by altering the magnetization of a ferromagnetic La0.67Ca0.33MnO3 overlayer. We provide evidence that the critical current suppression is related to the spin-polarized state of the magnetic layer, rather than a direct magnetic influence. We argue that the spin diffusion length in the superconducting layer is small compared with the typical domain size in the ferromagnetic layer in its demagnetized state.

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KW - superconducting devices

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

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Critical current control in a superconducting thin film with a ferromagnetic layer

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Keywords

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