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Magnetic vortex echoes
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10.1063/1.4768446
/content/aip/journal/jap/112/11/10.1063/1.4768446
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/11/10.1063/1.4768446

Figures

Image of FIG. 1.
FIG. 1.

Formation of magnetic vortex echoes: superposition of the individual simulated disks of the matrix at different instants. (a) Top view of the disk at t = 0, (b) top view at (before the inverting magnetic pulse), (c) bottom view at (after the inverting magnetic pulse), and (d) bottom view at (at the moment of the vortices refocalization). All disks initially with same circulation c = +1 and polarity p = +1. (enhanced online). [URL: http://dx.doi.org/10.1063/1.4768446.1]10.1063/1.4768446.1

Image of FIG. 2.
FIG. 2.

Magnetic vortex echoes: simulations (black line) for 100 nanodisks, with (a) , p = +1, and random c; (b) (in red, fit using Eq. (2) plus Eq. (5)); (c) , and (two pulses), and ; (d); (e) . The inversion pulses () are also shown (in blue). Disks in (b) to (e) initially with same circulation c = +1 and polarity p = +1.

Image of FIG. 3.
FIG. 3.

Variation of obtained by fitting the curves of echo intensity versus to , as a function of , for D = 250 nm, ; the continuous line is a linear fit.

Image of FIG. 4.
FIG. 4.

Variation of versus for an array of nanodisks with a distribution of diameters centered on D = 250 nm and separation d; the continuous line is the best fit to Eq. (8).

Image of FIG. 5.
FIG. 5.

Variation of versus for an array of nanodisks with a distribution of diameters centered on D = 250 nm and separation d; the continuous line is a linear fit. Inset (a) shows an echo simulation for d = 550 nm, .

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/content/aip/journal/jap/112/11/10.1063/1.4768446
2012-12-07
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic vortex echoes
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/11/10.1063/1.4768446
10.1063/1.4768446
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