Irreversible magnetization switching at the onset of superconductivity in a superconductor ferromagnet hybrid

P. J. Curran; J. Kim; N. Satchell; J. D S Witt; G. Burnell; M. G. Flokstra; S. L. Lee; J. F K Cooper; C. J. Kinane; S. Langridge; A. Isidori; N. Pugach; M. Eschrig; S. J. Bending

doi:10.1063/1.4938467

Irreversible magnetization switching at the onset of superconductivity in a superconductor ferromagnet hybrid

P. J. Curran, J. Kim, N. Satchell, J. D S Witt, G. Burnell, M. G. Flokstra, S. L. Lee, J. F K Cooper, C. J. Kinane, S. Langridge, A. Isidori, N. Pugach, M. Eschrig, S. J. Bending

Department of Physics

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Abstract

We demonstrate that the magnetic state of a superconducting spin valve, that is normally controlled with an external magnetic field, can also be manipulated by varying the temperature which increases the functionality and flexibility of such structures as switching elements. In this case, switching is driven by changes in the magnetostatic energy due to spontaneous Meissner screening currents forming in the superconductor below the critical temperature. Our scanning Hall probe measurements also reveal vortex-mediated pinning of the ferromagnetic domain structure due to the pinning of quantized stray fields in the adjacent superconductor. The ability to use temperature as well as magnetic field to control the local magnetisation structure raises the prospect of potential applications in magnetic memory devices.

Original language	English
Article number	262602
Journal	Applied Physics Letters
Volume	107
Issue number	26
DOIs	https://doi.org/10.1063/1.4938467
Publication status	Published - 28 Dec 2015

Bibliographical note

All data supporting this study are openly available from the University of Bath data archive at http://doi.org/10.15125/BATH-00159

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All data supporting this study are openly available from the University of Bath data archive at http://doi.org/10.15125/BATH-00159
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Curran, P. J., Kim, J., Satchell, N., Witt, J. D. S., Burnell, G., Flokstra, M. G., Lee, S. L., Cooper, J. F. K., Kinane, C. J., Langridge, S., Isidori, A., Pugach, N., Eschrig, M., & Bending, S. J. (2015). Irreversible magnetization switching at the onset of superconductivity in a superconductor ferromagnet hybrid. Applied Physics Letters, 107(26), Article 262602. https://doi.org/10.1063/1.4938467

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abstract = "We demonstrate that the magnetic state of a superconducting spin valve, that is normally controlled with an external magnetic field, can also be manipulated by varying the temperature which increases the functionality and flexibility of such structures as switching elements. In this case, switching is driven by changes in the magnetostatic energy due to spontaneous Meissner screening currents forming in the superconductor below the critical temperature. Our scanning Hall probe measurements also reveal vortex-mediated pinning of the ferromagnetic domain structure due to the pinning of quantized stray fields in the adjacent superconductor. The ability to use temperature as well as magnetic field to control the local magnetisation structure raises the prospect of potential applications in magnetic memory devices.",

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AU - Curran, P. J.

AU - Kim, J.

AU - Satchell, N.

AU - Witt, J. D S

AU - Burnell, G.

AU - Flokstra, M. G.

AU - Lee, S. L.

AU - Cooper, J. F K

AU - Kinane, C. J.

AU - Langridge, S.

AU - Isidori, A.

AU - Pugach, N.

AU - Eschrig, M.

AU - Bending, S. J.

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PY - 2015/12/28

Y1 - 2015/12/28

N2 - We demonstrate that the magnetic state of a superconducting spin valve, that is normally controlled with an external magnetic field, can also be manipulated by varying the temperature which increases the functionality and flexibility of such structures as switching elements. In this case, switching is driven by changes in the magnetostatic energy due to spontaneous Meissner screening currents forming in the superconductor below the critical temperature. Our scanning Hall probe measurements also reveal vortex-mediated pinning of the ferromagnetic domain structure due to the pinning of quantized stray fields in the adjacent superconductor. The ability to use temperature as well as magnetic field to control the local magnetisation structure raises the prospect of potential applications in magnetic memory devices.

AB - We demonstrate that the magnetic state of a superconducting spin valve, that is normally controlled with an external magnetic field, can also be manipulated by varying the temperature which increases the functionality and flexibility of such structures as switching elements. In this case, switching is driven by changes in the magnetostatic energy due to spontaneous Meissner screening currents forming in the superconductor below the critical temperature. Our scanning Hall probe measurements also reveal vortex-mediated pinning of the ferromagnetic domain structure due to the pinning of quantized stray fields in the adjacent superconductor. The ability to use temperature as well as magnetic field to control the local magnetisation structure raises the prospect of potential applications in magnetic memory devices.

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Irreversible magnetization switching at the onset of superconductivity in a superconductor ferromagnet hybrid

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