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Exchange anisotropy in polycrystalline films with hysteresis loop asymmetry
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10.1063/1.2747073
/content/aip/journal/ltp/33/11/10.1063/1.2747073
http://aip.metastore.ingenta.com/content/aip/journal/ltp/33/11/10.1063/1.2747073
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Field dependences of the magnetization of a film, obtained with the external magnetic field oriented along the easy axis of the FM layer. The vertical arrows denote the fields and , where kinks occur on the left-hand branch of the hysteresis loops, and the saturation fields and .

Image of FIG. 2.
FIG. 2.

Field dependences of the Kerr rotation of a film, which were obtained with the external magnetic field oriented collinearly to the field applied during film deposition.

Image of FIG. 3.
FIG. 3.

Hysteresis loops measured in the field range where only incomplete magnetization reversal of the FM layer of a film occurs (solid lines). The external magnetic field is oriented along the easy axis of the FM layer. The dashed lines show the sections of the curves which were obtained with complete magnetization reversal (see Fig. 1). The vertical arrows (Fig. 3d) mark kinks on the hysteresis loop (the points and ) and the saturation field of the film (the point ).

Image of FIG. 4.
FIG. 4.

Field dependences of the magnetization of a FeNi(50 Å)/ film, which were obtained with the external field oriented along the difficult axis of the FM layer.

Image of FIG. 5.
FIG. 5.

Computed field dependences of the magnetization of a film for the external field oriented along the easy axis. The values of the exchange anisotropy constants (Fig. 5a) are indicated in the text. In the calculation of the curve presented in Fig. 5b these values were increased by a factor of 10. and —first-order phase-transition fields, , , , and —lability fields.

Image of FIG. 6.
FIG. 6.

The energy versus the direction of the magnetization vector of the FM layer of the film with exchange anisotropy constants . The external field is equal to the phase transition field (a) and (b). Inset: A section of the curve shown on an enlarged scale.

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/content/aip/journal/ltp/33/11/10.1063/1.2747073
2007-11-01
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Exchange anisotropy in polycrystalline FeNi∕FeMn films with hysteresis loop asymmetry
http://aip.metastore.ingenta.com/content/aip/journal/ltp/33/11/10.1063/1.2747073
10.1063/1.2747073
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