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Memory effect in a system of zincblende Mn-rich Mn(Ga)As nanoclusters embedded in GaAs
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View: Figures


Image of FIG. 1.
FIG. 1.

HRTEM images of sample D, (a) the image over a wide area, (b) the image of a cluster, (c) the SAD pattern of a GaAs matrix, and (d) the NBD pattern of the cluster.

Image of FIG. 2.
FIG. 2.

(Color online) Temperature dependence of the magnetization in a field for samples A–D. Inset: (upper) temperature dependence of dc ZFC and FC magnetizations in a field for sample D; (lower) curves for samples A, B, and D at .

Image of FIG. 3.
FIG. 3.

(Color online) (a) curves recorded for memory effect of (in) sample D. The solid line is measured as a reference. The solid squares are measured by FC the sample to at the same rate except a triple stop-and-wait period and the open circles stand for heating again without pause. The inset shows the magnetic relaxation at fitted by a logarithmic form. (b) vs curve.

Image of FIG. 4.
FIG. 4.

(Color online) curves of sample D (a) with temporary cooling at and (b) with temporary heating at . The process is shown in the insets and the open circles are plotted against . The insets also show the magnetization vs the logarithm of total time spent at curve, where the relaxation curve during is on the continuation of the curve during after cooling rather than heating.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Memory effect in a system of zincblende Mn-rich Mn(Ga)As nanoclusters embedded in GaAs