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Magnetization reversal asymmetry in [Co/Pt]/CoFe/IrMn multilayers with enhanced perpendicular exchange bias
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10.1063/1.4775837
/content/aip/journal/jap/113/3/10.1063/1.4775837
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/3/10.1063/1.4775837

Figures

Image of FIG. 1.
FIG. 1.

A sketch of the Kerr measurement setup (a) and Kerr magnetization hysteresis loops measured with magnetic field aligned at different angles with respect to the easy axis direction, ϕ ((b)-(d)).

Image of FIG. 2.
FIG. 2.

Magnetic domain evolution with applied field and time for the descending and ascending branches of sample I ((a) and (b)) and sample II ((c) and (d)).

Image of FIG. 3.
FIG. 3.

Magnetization relaxation curves at different applied magnetic fields for the descending and ascending branches in the hysteresis loop of sample I ((a) and (b)) and sample II ((c) and (d)) measured by SMOKE. The solid lines indicate the relaxation curves fitted by Fatuzzo-Labrune model. The red hollow points are the evolution of the ratio of the area having not been reversed to the total area of one Kerr microscopy image.

Image of FIG. 4.
FIG. 4.

Magnetization relaxation curves as a function of ln(t) of the descending (a) and ascending (b) branches in the hysteresis loop and angular dependence of calculated magnetic energy for descending (c) and ascending (d) reversals in sample II. The red lines in (a) and (b) indicate the maximum slope of the relaxation curves.

Tables

Generic image for table
Table I.

The nucleation densities, Barkhausen volumes, switching fields, interfacial exchange coupling energies and the dispersions of the activated energy barriers, exchange coupling energies and direction of anisotropic axes for the descending and ascending branches of two samples.

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/content/aip/journal/jap/113/3/10.1063/1.4775837
2013-01-15
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetization reversal asymmetry in [Co/Pt]/CoFe/IrMn multilayers with enhanced perpendicular exchange bias
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/3/10.1063/1.4775837
10.1063/1.4775837
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