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In-plane magnetoresistance and magnetization reversal of cobalt antidot arrays
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10.1063/1.3184427
/content/aip/journal/jap/106/3/10.1063/1.3184427
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/3/10.1063/1.3184427

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic image of the cobalt Hall bar containing an antidot array. (b) SEM image of sample 3. (c) Magnified SEM image of sample 3 at the arm crossing region with a unit cell highlighted. (d) Magnified SEM image of sample 4 (unit cell highlighted).

Image of FIG. 2.
FIG. 2.

Stable states of the micromagnetic configuration of an antidot array during magnetization reversal. The sample area is with and . The applied magnetic field saturates the magnetization along the direction. (a) and (b) are different geometries with the easy axis along and , respectively. The circled numbered areas illustrate the (antivortex) (A to C) and 180° (D), and 90° (E and F) domain walls.

Image of FIG. 3.
FIG. 3.

The in-plane longitudinal MR characteristic at . See Table I for a summary of the sample parameters.

Image of FIG. 4.
FIG. 4.

The in-plane transverse MR characteristic at . See Table I for a summary of the sample parameters.

Image of FIG. 5.
FIG. 5.

The coercive field and MR ratio with respect to the antidot areal density. Sample 4 has special symbols to differentiate it from other samples with square lattice.

Image of FIG. 6.
FIG. 6.

The in-plane longitudinal MR of sample 3. Insets A–F are the schematics of the magnetization configurations in a section of the antidot arrays at different ( sweeps from positive to the negative side). Inset G is the schematic of the current density distribution. Inset H is the magnified plot in the field range of with Barkhausen jumps.

Tables

Generic image for table
Table I.

A summary of the sample dimensions. Antidot areal density is defined as follows: antidot area in a unit cell/unit cell for square lattice antidot arrays.

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/content/aip/journal/jap/106/3/10.1063/1.3184427
2009-08-03
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: In-plane magnetoresistance and magnetization reversal of cobalt antidot arrays
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/3/10.1063/1.3184427
10.1063/1.3184427
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