Staff View: Magnetic noise in MgO-based magnetic tunnel junction rings.

Magnetic noise in MgO-based magnetic tunnel junction rings.

Bibliographic Details
Main Authors:	Feng, J., Diao, Z., Feng, Gen., Nowak, E., Coey, J.
Format:	Villanova Faculty Authorship
Language:	English
Published:	2010
Online Access:	http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:176134

Main Authors:

Feng, J., Diao, Z., Feng, Gen., Nowak, E., Coey, J.

Format:

Villanova Faculty Authorship

Language:

English

Published:

2010

Online Access:

http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:176134

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spelling	Magnetic noise in MgO-based magnetic tunnel junction rings. Feng, J. Diao, Z. Feng, Gen. Nowak, E. Coey, J. Magnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable states are observed for the ferromagnetic free layer. Electrical noise is used to characterize the low frequency magnetization dynamics; a stationary 1/f noise spectrum is observed within each magnetic state but they are separated by noise peaks which show a 1/f2 spectrum that is associated with slow random telegraph fluctuations. In the 1/f region, the normalized magnetic noise parameter, _mag, is shown to be consistent with the fluctuation-dissipation theorem. 2010 Villanova Faculty Authorship vudl:176134 Applied Physics Letters 96, 2010, 052504-1-3. en
dc.title_txt_mv	Magnetic noise in MgO-based magnetic tunnel junction rings.
dc.creator_txt_mv	Feng, J. Diao, Z. Feng, Gen. Nowak, E. Coey, J.
dc.description_txt_mv	Magnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable states are observed for the ferromagnetic free layer. Electrical noise is used to characterize the low frequency magnetization dynamics; a stationary 1/f noise spectrum is observed within each magnetic state but they are separated by noise peaks which show a 1/f2 spectrum that is associated with slow random telegraph fluctuations. In the 1/f region, the normalized magnetic noise parameter, _mag, is shown to be consistent with the fluctuation-dissipation theorem.
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dc.language_txt_mv	en
author	Feng, J. Diao, Z. Feng, Gen. Nowak, E. Coey, J.
spellingShingle	Feng, J. Diao, Z. Feng, Gen. Nowak, E. Coey, J. Magnetic noise in MgO-based magnetic tunnel junction rings.
author_facet	Feng, J. Diao, Z. Feng, Gen. Nowak, E. Coey, J.
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description	Magnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable states are observed for the ferromagnetic free layer. Electrical noise is used to characterize the low frequency magnetization dynamics; a stationary 1/f noise spectrum is observed within each magnetic state but they are separated by noise peaks which show a 1/f2 spectrum that is associated with slow random telegraph fluctuations. In the 1/f region, the normalized magnetic noise parameter, _mag, is shown to be consistent with the fluctuation-dissipation theorem.
title	Magnetic noise in MgO-based magnetic tunnel junction rings.
title_full	Magnetic noise in MgO-based magnetic tunnel junction rings.
title_fullStr	Magnetic noise in MgO-based magnetic tunnel junction rings.
title_full_unstemmed	Magnetic noise in MgO-based magnetic tunnel junction rings.
title_short	Magnetic noise in MgO-based magnetic tunnel junction rings.
title_sort	magnetic noise in mgo-based magnetic tunnel junction rings.
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spelling

Magnetic noise in MgO-based magnetic tunnel junction rings.
Feng, J.
Diao, Z.
Feng, Gen.
Nowak, E.
Coey, J.
Magnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable states are observed for the ferromagnetic free layer. Electrical noise is used to characterize the low frequency magnetization dynamics; a stationary 1/f noise spectrum is observed within each magnetic state but they are separated by noise peaks which show a 1/f2 spectrum that is associated with slow random telegraph fluctuations. In the 1/f region, the normalized magnetic noise parameter, _mag, is shown to be consistent with the fluctuation-dissipation theorem.
2010
Villanova Faculty Authorship
vudl:176134
Applied Physics Letters 96, 2010, 052504-1-3.
en

dc.title_txt_mv

Magnetic noise in MgO-based magnetic tunnel junction rings.

dc.creator_txt_mv

Feng, J.
Diao, Z.
Feng, Gen.
Nowak, E.
Coey, J.

dc.description_txt_mv

Magnetization switching is investigated in ring-shaped MgO-based magnetic tunnel junctions with 168% tunneling magnetoresistance. Besides the forward and reverse onion states, two vortex states and several metastable states are observed for the ferromagnetic free layer. Electrical noise is used to characterize the low frequency magnetization dynamics; a stationary 1/f noise spectrum is observed within each magnetic state but they are separated by noise peaks which show a 1/f2 spectrum that is associated with slow random telegraph fluctuations. In the 1/f region, the normalized magnetic noise parameter, _mag, is shown to be consistent with the fluctuation-dissipation theorem.

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2010

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Feng, J.
Diao, Z.
Feng, Gen.
Nowak, E.
Coey, J.

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Feng, J.
Diao, Z.
Feng, Gen.
Nowak, E.
Coey, J.
Magnetic noise in MgO-based magnetic tunnel junction rings.

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Feng, J.
Diao, Z.
Feng, Gen.
Nowak, E.
Coey, J.

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Magnetic noise in MgO-based magnetic tunnel junction rings.

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Magnetic noise in MgO-based magnetic tunnel junction rings.

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magnetic noise in mgo-based magnetic tunnel junction rings.

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Magnetic noise in MgO-based magnetic tunnel junction rings.

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