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Thickness and annealing temperature dependences of magnetization reversal and domain structures in exchange biased Co/Ir–Mn bilayers
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10.1063/1.3130411
/content/aip/journal/jap/105/10/10.1063/1.3130411
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/10/10.1063/1.3130411
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

MOIF images of a sample corner for two saturated states. Insets show the intensity changes in the MO signals along the profile lines. The intensity is averaged over the rectangle shown in panel.

Image of FIG. 2.
FIG. 2.

Hysteresis loops of as-deposited Co/Ir–Mn bilayers in the field applied along the magnetic anisotropy axis. The upper part of the 10 nm Co layer is caused by an unbiased part of the sample.

Image of FIG. 3.
FIG. 3.

MOIF images of the domain structure taken during the magnetization reversal of an as-deposited Co/Ir–Mn bilayer with 4 nm thick Co. (a)–(f) correspond to the conditions indicated by the circles labeled by the same letters on the hysteresis loop in Fig. 2, top loop. The white and black arrows indicate the directions of the field and magnetization, respectively.

Image of FIG. 4.
FIG. 4.

MOIF images of the domain structure taken during the magnetization reversal of an as-deposited Co/Ir–Mn bilayer with 10 nm thick Co. (a)–(f) correspond to the conditions indicated by the circles labeled by the same letters on the hysteresis loop in Fig. 2, bottom loop. The white and black arrows indicate the directions of the field and magnetization, respectively.

Image of FIG. 5.
FIG. 5.

Hysteresis loops of the same Co/Ir–Mn bilayers after annealing at .

Image of FIG. 6.
FIG. 6.

Annealing temperature dependence of the coercive field of forward (empty symbols) and backward (full symbols) branches of the hysteresis loops. The solid lines are guides to the eye.

Image of FIG. 7.
FIG. 7.

Annealing temperature dependence of the magnetization (a) , (b) coercivity , and (c) exchange bias field for three Co thicknesses. The solid lines are guides to the eye.

Image of FIG. 8.
FIG. 8.

MOIF images of the domain structure taken during magnetization reversal of a 4 nm Co Co/Ir–Mn bilayer along the unidirectional axis after annealing at . (a)–(f) correspond to the conditions indicated by the circles labeled by the same letters on the hysteresis loop in Fig. 5, top loop. The white and black arrows indicate the directions of the field and magnetization, respectively. Dashed arrows mark some domains.

Image of FIG. 9.
FIG. 9.

MOIF images of the remagnetization processes of the Co(10 nm)/Ir–Mn structure after annealing at . (a)–(f) correspond to the conditions indicated by the circles labeled by the same letters on the hysteresis loop in Fig. 5, bottom loop. The white and black arrows indicate the directions of the field and magnetization, respectively. The visible inhomogeneities of the MO contrast near the sample edge are caused by scratches, which were made during cleavage of the small part of the sample from the bigger one. Dashed arrows mark some domains.

Image of FIG. 10.
FIG. 10.

XRD scan patterns for the 4 and 10 nm thickness Co/Ir–Mn bilayers in the as-deposited state and after the annealing.

Image of FIG. 11.
FIG. 11.

MOIF images of the annealed at Co(10 nm)/Ir–Mn bilayer during reversal in the field applied at the angles of 0°, 10° CCW, and 10° CW from the direction opposite to the unidirectional anisotropy. The black arrows indicate the negative field axis. Insets indicate the Fourier transform of the shown domain structures.

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/content/aip/journal/jap/105/10/10.1063/1.3130411
2009-05-28
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thickness and annealing temperature dependences of magnetization reversal and domain structures in exchange biased Co/Ir–Mn bilayers
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/10/10.1063/1.3130411
10.1063/1.3130411
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