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Temperature induced single domain–vortex state transition in sub- Fe nanodots
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) A family of FORC’s for the Fe nanodots at , whose starting points are represented by black dots. (b) The corresponding FORC distribution as a contour plot against applied field and reversal field . The two red FORC’s in (a) correspond to line scans 1 and 2 in (b). The dotted black box in (b) highlights a residual FORC feature due to single domain nanodots.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Representative major hysteresis loops at 10, 200, and , and three-dimensional FORC distributions at (b) and (c) . The black arrow in (b) and (c) indicates a feature in the FORC distribution due to the single domain phase. A cross-sectional view of the FORC distribution along the local coercivity axis is shown in (d).

Image of FIG. 3.
FIG. 3.

(Color online) (a) Percentage of the nanodots that are single domain at a given temperature. (b) Temperature dependence of the nucleation (solid squares) and annihilation (open circles) fields of the vortex phase, determined from peak positions in the FORC distribution. Solid lines are guides to the eye.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots