Journal
PHYSICA B-CONDENSED MATTER
Volume 407, Issue 15, Pages 2947-2949Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2011.08.023
Keywords
Spintronics; Diluted magnetic semiconductors; Ferromagnetism; Phase separation; Transmission electron microscope
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Funding
- Grants-in-Aid for Scientific Research [21310070, 24656005] Funding Source: KAKEN
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We have studied the structural properties of the phase separation in Zn1-xCrxTe films grown by MBE with a relatively high Cr composition x similar to 0.2. In the combined analyses using TEM and EELS, it has been revealed that the Cr-aggregated regions are composed of precipitates of the hexagonal structure, which are formed in a particular crystallographic relation with the zinc-blende (ZB) structure of the matrix that the c-plane of the hexagonal structure nearly parallel to the (1 1 1) plane of the ZB structure. In the XRD measurements, the diffraction from the hexagonal precipitates has been detected in the omega-scan. From the measurements on the series of films grown at different temperatures, it has been suggested the hexagonal precipitates were formed in a larger quantity with the increase in growth temperature. (C) 2011 Elsevier B.V. All rights reserved.
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