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Hysteresis of ultrasmall Fe–Pt particles
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10.1063/1.2837623
/content/aip/journal/jap/103/7/10.1063/1.2837623
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/7/10.1063/1.2837623
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

TEM image of FePt nanoparticles having diameters of (a) and (b) .

Image of FIG. 2.
FIG. 2.

Hysteresis loops of FePt particles of different sizes.

Image of FIG. 3.
FIG. 3.

Nucleation modes in spherical particles: (a) coherent rotation, (b) example of a low-lying asymmetric excited mode, (c) lowest-lying symmetric excited mode, and (d) typical situation in practice. Bright and dark regions denote magnetization components perpendicular magnetization components of opposite directions, and the small dot in (d) is a structural imperfection.

Image of FIG. 4.
FIG. 4.

Simulated loops. The gray area is the magnetization of the shell of the particle. The small “jumps” in the loop mean that groups of cells switch in a coordinated manner. The jumps depend on the cell size and can be shown to smooth on ensemble averaging.

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/content/aip/journal/jap/103/7/10.1063/1.2837623
2008-03-07
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Hysteresis of ultrasmall Fe–Pt particles
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/7/10.1063/1.2837623
10.1063/1.2837623
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