Enhanced exchange bias effects in a nanopatterned system consisting of two perpendicularly coupled ferromagnets

A. Bollero; B. Dieny; J. Sort; K. S. Buchanan; S. Landis; J. Nogús

doi:https://doi.org/10.1063/1.2833124

Enhanced exchange bias effects in a nanopatterned system consisting of two perpendicularly coupled ferromagnets

A. Bollero, B. Dieny, J. Sort, K. S. Buchanan, S. Landis, J. Nogús

Department of Physics

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11 Citations (Scopus)

Abstract

The effect of patterning on the shift of the hysteresis loop HE and coercivity HC in a system composed of two perpendicularly exchange-coupled ferromagnets (NiFe sputtered onto a [PtCo] multilayer) is investigated in long stripes and square dots. Setting the exchange bias coupling along the stripes results in a threefold increase of HE compared to the continuous films. HC increases dramatically when the coupling is set perpendicular to the stripes and also in the dots. Magnetic force microscopy studies and micromagnetic simulations suggest that differences in the number and orientation of the magnetic domains can account for the observed effects. © 2008 American Institute of Physics.

Original language	English
Article number	022508
Journal	Applied physics letters
Volume	92
DOIs	https://doi.org/10.1063/1.2833124
Publication status	Published - 28 Jan 2008

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title = "Enhanced exchange bias effects in a nanopatterned system consisting of two perpendicularly coupled ferromagnets",

abstract = "The effect of patterning on the shift of the hysteresis loop HE and coercivity HC in a system composed of two perpendicularly exchange-coupled ferromagnets (NiFe sputtered onto a [PtCo] multilayer) is investigated in long stripes and square dots. Setting the exchange bias coupling along the stripes results in a threefold increase of HE compared to the continuous films. HC increases dramatically when the coupling is set perpendicular to the stripes and also in the dots. Magnetic force microscopy studies and micromagnetic simulations suggest that differences in the number and orientation of the magnetic domains can account for the observed effects. {\textcopyright} 2008 American Institute of Physics.",

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T1 - Enhanced exchange bias effects in a nanopatterned system consisting of two perpendicularly coupled ferromagnets

AU - Bollero, A.

AU - Dieny, B.

AU - Sort, J.

AU - Buchanan, K. S.

AU - Landis, S.

AU - Nogús, J.

PY - 2008/1/28

Y1 - 2008/1/28

N2 - The effect of patterning on the shift of the hysteresis loop HE and coercivity HC in a system composed of two perpendicularly exchange-coupled ferromagnets (NiFe sputtered onto a [PtCo] multilayer) is investigated in long stripes and square dots. Setting the exchange bias coupling along the stripes results in a threefold increase of HE compared to the continuous films. HC increases dramatically when the coupling is set perpendicular to the stripes and also in the dots. Magnetic force microscopy studies and micromagnetic simulations suggest that differences in the number and orientation of the magnetic domains can account for the observed effects. © 2008 American Institute of Physics.

AB - The effect of patterning on the shift of the hysteresis loop HE and coercivity HC in a system composed of two perpendicularly exchange-coupled ferromagnets (NiFe sputtered onto a [PtCo] multilayer) is investigated in long stripes and square dots. Setting the exchange bias coupling along the stripes results in a threefold increase of HE compared to the continuous films. HC increases dramatically when the coupling is set perpendicular to the stripes and also in the dots. Magnetic force microscopy studies and micromagnetic simulations suggest that differences in the number and orientation of the magnetic domains can account for the observed effects. © 2008 American Institute of Physics.

U2 - https://doi.org/10.1063/1.2833124

DO - https://doi.org/10.1063/1.2833124

M3 - Article

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VL - 92

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 022508

ER -

Enhanced exchange bias effects in a nanopatterned system consisting of two perpendicularly coupled ferromagnets

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