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Effects of mechanical contact stress on magnetic properties of ferromagnetic film
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10.1063/1.4759330
/content/aip/journal/jap/112/8/10.1063/1.4759330
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/8/10.1063/1.4759330

Figures

Image of FIG. 1.
FIG. 1.

Magnetic hysteresis loops of (a) sample A and (b) sample B with geometry shown in the inset (arrows indicate applied field directions).

Image of FIG. 2.
FIG. 2.

Nanoindentation measurements for sample A; (a) hardness and (b) reduced elastic modulus.

Image of FIG. 3.
FIG. 3.

Nanoindentation measurements for sample B; (a) hardness and (b) reduced elastic modulus.

Image of FIG. 4.
FIG. 4.

Ramp loading nanoscratch test; (a) load-displacement profile and (b) schematic of residual scratch formulation.

Image of FIG. 5.
FIG. 5.

Mechanical and magnetic degradation during a ramp loading nanoscratch experiment.

Image of FIG. 6.
FIG. 6.

Constant loading nanoscratch test; (a) load-displacement profile and (b) schematic of residual scratch formulation.

Image of FIG. 7.
FIG. 7.

Representative images for sample A after ramp loading nanoscratch test; (a) AFM and (b) MFM.

Image of FIG. 8.
FIG. 8.

Representative images for sample A after constant loading nanoscratch test; (a) AFM and (b) MFM.

Image of FIG. 9.
FIG. 9.

The residual scratch measurements from AFM and MFM; (a) residual scratch length after ramp loading nanoscratch and (b) residual scratch width after constant loading nanoscratch.

Image of FIG. 10.
FIG. 10.

Schematic of contact stress distribution during sliding contact; (a) stresses in side view and (b) top view.

Image of FIG. 11.
FIG. 11.

Von Mises stresses during constant loading nanoscratch with the contact force of 500 μN; (a) sample A and (a) sample B.

Image of FIG. 12.
FIG. 12.

Schematic of the prevailing pile-up material behavior in both sides of sliding track.

Tables

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Table I.

Measured magnetic properties of the permalloy films at sweep frequency of 10 Hz.

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Table II.

Rate of mechanical and magnetic degradation of scratches by constant and ramp loads on the magnetic film samples.

Generic image for table
Table III.

Input material properties of the tip and magnetic film samples. E and ν denote the Young's modulus and Poisson's ratio.

Generic image for table
Table IV.

Critical load and von Mises stress to initiate material degradation.

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/content/aip/journal/jap/112/8/10.1063/1.4759330
2012-10-16
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of mechanical contact stress on magnetic properties of ferromagnetic film
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/8/10.1063/1.4759330
10.1063/1.4759330
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