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Dependence of exchange coupling direction on cooling-field strength

We studied the dependence of exchange coupling on cooling-field strength in an exchange-biased spin valve with a synthetic antiferromagnetic layer by experiment and theory. Our theory calculates magnetic anisotropy energies in each magnetic layer composing the spin valve during the field-cooling pro... Full description

Journal Title: Journal of Applied Physics 01 September 2011, Vol.110(5)
Main Author: Son, Jangyup
Other Authors: Lee, Soogil , Lee, Sangho , Kim, Sanghoon , Hong, Jongill
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0021-8979 ; E-ISSN: 1089-7550 ; DOI: 10.1063/1.3632066
Link: http://dx.doi.org/10.1063/1.3632066
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recordid: aip_complete10.1063/1.3632066
title: Dependence of exchange coupling direction on cooling-field strength
format: Article
creator:
  • Son, Jangyup
  • Lee, Soogil
  • Lee, Sangho
  • Kim, Sanghoon
  • Hong, Jongill
subjects:
  • Articles
ispartof: Journal of Applied Physics, 01 September 2011, Vol.110(5)
description: We studied the dependence of exchange coupling on cooling-field strength in an exchange-biased spin valve with a synthetic antiferromagnetic layer by experiment and theory. Our theory calculates magnetic anisotropy energies in each magnetic layer composing the spin valve during the field-cooling process, finds the minimum state of total energy, and explains how the magnetizations in the layers interact with one another during field-cooling under various cooling-field strengths. Calculations based on the theory well match results of the experimental measurements. Our observation shows that one has to carefully choose the cooling-field strength optimal for designing exchange-biased spin devices having a synthetic antiferromagnetic layer; otherwise the exchange coupling direction can significantly deviate from the cooling-field direction, which impairs performance.
language: eng
source:
identifier: ISSN: 0021-8979 ; E-ISSN: 1089-7550 ; DOI: 10.1063/1.3632066
fulltext: fulltext
issn:
  • 0021-8979
  • 1089-7550
  • 00218979
  • 10897550
url: Link


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descriptionWe studied the dependence of exchange coupling on cooling-field strength in an exchange-biased spin valve with a synthetic antiferromagnetic layer by experiment and theory. Our theory calculates magnetic anisotropy energies in each magnetic layer composing the spin valve during the field-cooling process, finds the minimum state of total energy, and explains how the magnetizations in the layers interact with one another during field-cooling under various cooling-field strengths. Calculations based on the theory well match results of the experimental measurements. Our observation shows that one has to carefully choose the cooling-field strength optimal for designing exchange-biased spin devices having a synthetic antiferromagnetic layer; otherwise the exchange coupling direction can significantly deviate from the cooling-field direction, which impairs performance.
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descriptionWe studied the dependence of exchange coupling on cooling-field strength in an exchange-biased spin valve with a synthetic antiferromagnetic layer by experiment and theory. Our theory calculates magnetic anisotropy energies in each magnetic layer composing the spin valve during the field-cooling process, finds the minimum state of total energy, and explains how the magnetizations in the layers interact with one another during field-cooling under various cooling-field strengths. Calculations based on the theory well match results of the experimental measurements. Our observation shows that one has to carefully choose the cooling-field strength optimal for designing exchange-biased spin devices having a synthetic antiferromagnetic layer; otherwise the exchange coupling direction can significantly deviate from the cooling-field direction, which impairs performance.
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abstractWe studied the dependence of exchange coupling on cooling-field strength in an exchange-biased spin valve with a synthetic antiferromagnetic layer by experiment and theory. Our theory calculates magnetic anisotropy energies in each magnetic layer composing the spin valve during the field-cooling process, finds the minimum state of total energy, and explains how the magnetizations in the layers interact with one another during field-cooling under various cooling-field strengths. Calculations based on the theory well match results of the experimental measurements. Our observation shows that one has to carefully choose the cooling-field strength optimal for designing exchange-biased spin devices having a synthetic antiferromagnetic layer; otherwise the exchange coupling direction can significantly deviate from the cooling-field direction, which impairs performance.
pubAmerican Institute of Physics
doi10.1063/1.3632066
date2011-09-01