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Microwave assisted switching mechanism and its stable switching limit
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10.1063/1.3436570
/content/aip/journal/jap/107/12/10.1063/1.3436570
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/12/10.1063/1.3436570
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Switching probability curves as a function of for (a) CP 5 GHz, (b) CP 25 GHz, (c) LP 5 GHz, and (d) LP 25 GHz, respectively. Numbers in figures indicate the ac field amplitude .

Image of FIG. 2.
FIG. 2.

SFD for (a) CP and (b) LP with , 15, 25, and 35 GHz as a function of .

Image of FIG. 3.
FIG. 3.

Switching field for (a) CP 5 GHz, (b) CP 25 GHz, (c) LP 5 GHz, and (d) LP 25 GHz, respectively, at the temperature ranging from 0 to 500 K as a function of . Arrows in (b) and (d) indicate the abrupt change in .

Image of FIG. 4.
FIG. 4.

Schematic illustration the astroid curves given by conventional SW model in the laboratory frame and that modified in the rotating frame, respectively. Inset illustrates the relationship between the effective field and the magnetization precession in the rotating frame.

Image of FIG. 5.
FIG. 5.

Curves for and for (a) CP 5 GHz, (b) CP 25 GHz, (c) LP 5 GHz, and (d) LP 25 GHz, respectively, as a function of . Broken lines indicate the modified SW model in the rotating frame. Solid circles are the simulated at presented in Fig. 3.

Image of FIG. 6.
FIG. 6.

Time evolution of and trajectories for CP 25 GHz with the conditions of (a) the stable switching region ( and ) and (b) the unstable switching region ( and ), respectively.

Image of FIG. 7.
FIG. 7.

Gilbert damping dependences of (a) the required ac field amplitude for and (b) the critical one for the limit of stable switching region.

Image of FIG. 8.
FIG. 8.

ac field amplitude dependences of (a) the critical ac frequency for the limit of stable switching region and (b) its corresponding switching field .

Image of FIG. 9.
FIG. 9.

Temperature dependences of the switching field in the rotating frame for (a) CP and (b) LP with , respectively. Solid lines are the best fitting using the Sharrock type thermal fluctuation formula modified in the rotating frame [Eq. (5)].

Image of FIG. 10.
FIG. 10.

Best fitted energy barrier for (a) CP and (b) LP as a function of . Dotted lines indicate the intrinsic energy barrier of the magnetic particle.

Image of FIG. 11.
FIG. 11.

Best fitted anisotropy field for (a) CP and (b) LP as functions of . Dotted lines indicate the intrinsic anisotropy field of the magnetic particle.

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/content/aip/journal/jap/107/12/10.1063/1.3436570
2010-06-24
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Microwave assisted switching mechanism and its stable switching limit
http://aip.metastore.ingenta.com/content/aip/journal/jap/107/12/10.1063/1.3436570
10.1063/1.3436570
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