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X-ray imaging of nonlinear resonant gyrotropic magnetic vortex core motion in circular permalloy disks
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10.1063/1.3678448
/content/aip/journal/jap/111/7/10.1063/1.3678448
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3678448
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) An image of the sample taken with no applied field. (Inset) The magnetization normal to the plane with respect to position on the sample. The vortex core is 52 nm in diameter.

Image of FIG. 2.
FIG. 2.

(Color online) A representative sequence of images taken with a lower amplitude oscillating field of H0 ∼ 4 Oe. Sample imaged at (a) 300 MHz, (b) 320 MHz, (c) 345 MHz, (d) 360 MHz, and (e) 380 MHz. Red arrows highlight the images of the dark VC. The VC is not visible in (c). Scale bar is 1 μm.

Image of FIG. 3.
FIG. 3.

(Color online) A summary of the images taken over a range of frequencies and amplitudes. The blue circles indicate a frequency and amplitude where the core was visible, and the red diamonds a frequency and amplitude where the core was indistinct or not visible in at least two images. The pink overlay emphasizes the general trend of the data: a single resonance splitting to two at higher applied fields.

Image of FIG. 4.
FIG. 4.

(Color online) A representative sequence of images taken with a higher amplitude oscillating field of H0 ∼ 10 Oe. Sample imaged at (a) 300 MHz, (b) 320 MHz, (c) 345 MHz, (d) 360 MHz, and (e) 380 MHz. Arrows highlight the visible VC in (a), (c), and (e). The red arrows ((a) and (e)) point toward a dark VC while the blue arrow (c) points out a light VC in (c), indicating a change in core polarity before and after the 345 MHz image was taken. Scale bar is 1 μm.

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/content/aip/journal/jap/111/7/10.1063/1.3678448
2012-03-09
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: X-ray imaging of nonlinear resonant gyrotropic magnetic vortex core motion in circular permalloy disks
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3678448
10.1063/1.3678448
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