Magnetization reversal in the pinned layer of CoFe/PtMn bilayers

Y. G. Wang; A. K. Petford-Long

doi:10.1016/j.jmmm.2004.01.049

Magnetization reversal in the pinned layer of CoFe/PtMn bilayers

Y. G. Wang^*, A. K. Petford-Long

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

The magnetization reversal of the ferromagnetic (FM) layer in CoFe/PtMn exchange-coupled bilayer films has been investigated using bulk magnetometry. These films exhibit very complex angular dependence and the easy axis is perpendicular to the field applied during deposition and post-annealing. Holding the film at negative saturation of the FM layer for up to 17h results in no change in the exchange field. We believe that this is a thermally stable exchange-coupled system. Only limited thermal activation with a small time constant appears and no thermally activated reversal of the antiferromagnetic layer with a large time constant exits.

Original language	English (US)
Pages (from-to)	82-90
Number of pages	9
Journal	Journal of Magnetism and Magnetic Materials
Volume	279
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2004.01.049
State	Published - Aug 2004

Keywords

CoFe/PtMn bilayer
Exchange coupling
Hysteresis
Magnetization reversal
Thermal activation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1016/j.jmmm.2004.01.049

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title = "Magnetization reversal in the pinned layer of CoFe/PtMn bilayers",

abstract = "The magnetization reversal of the ferromagnetic (FM) layer in CoFe/PtMn exchange-coupled bilayer films has been investigated using bulk magnetometry. These films exhibit very complex angular dependence and the easy axis is perpendicular to the field applied during deposition and post-annealing. Holding the film at negative saturation of the FM layer for up to 17h results in no change in the exchange field. We believe that this is a thermally stable exchange-coupled system. Only limited thermal activation with a small time constant appears and no thermally activated reversal of the antiferromagnetic layer with a large time constant exits.",

keywords = "CoFe/PtMn bilayer, Exchange coupling, Hysteresis, Magnetization reversal, Thermal activation",

author = "Wang, {Y. G.} and Petford-Long, {A. K.}",

note = "Funding Information: This work was supported by EPSRC. The authors would like to acknowledge Seagate Technology for partial financial support and Deirdre O{\textquoteright}Neill for the provision of samples. We are also grateful to K. O{\textquoteright}Grady for provision of magnetometry facilities.",

year = "2004",

month = aug,

doi = "10.1016/j.jmmm.2004.01.049",

language = "English (US)",

volume = "279",

pages = "82--90",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

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TY - JOUR

T1 - Magnetization reversal in the pinned layer of CoFe/PtMn bilayers

AU - Wang, Y. G.

AU - Petford-Long, A. K.

N1 - Funding Information: This work was supported by EPSRC. The authors would like to acknowledge Seagate Technology for partial financial support and Deirdre O’Neill for the provision of samples. We are also grateful to K. O’Grady for provision of magnetometry facilities.

PY - 2004/8

Y1 - 2004/8

N2 - The magnetization reversal of the ferromagnetic (FM) layer in CoFe/PtMn exchange-coupled bilayer films has been investigated using bulk magnetometry. These films exhibit very complex angular dependence and the easy axis is perpendicular to the field applied during deposition and post-annealing. Holding the film at negative saturation of the FM layer for up to 17h results in no change in the exchange field. We believe that this is a thermally stable exchange-coupled system. Only limited thermal activation with a small time constant appears and no thermally activated reversal of the antiferromagnetic layer with a large time constant exits.

AB - The magnetization reversal of the ferromagnetic (FM) layer in CoFe/PtMn exchange-coupled bilayer films has been investigated using bulk magnetometry. These films exhibit very complex angular dependence and the easy axis is perpendicular to the field applied during deposition and post-annealing. Holding the film at negative saturation of the FM layer for up to 17h results in no change in the exchange field. We believe that this is a thermally stable exchange-coupled system. Only limited thermal activation with a small time constant appears and no thermally activated reversal of the antiferromagnetic layer with a large time constant exits.

KW - CoFe/PtMn bilayer

KW - Exchange coupling

KW - Hysteresis

KW - Magnetization reversal

KW - Thermal activation

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DO - 10.1016/j.jmmm.2004.01.049

M3 - Article

AN - SCOPUS:3042855698

SN - 0304-8853

VL - 279

SP - 82

EP - 90

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1

ER -

Magnetization reversal in the pinned layer of CoFe/PtMn bilayers

Abstract

Keywords

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