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Epitaxial Ferromagnetic Nanoislands of Cubic GdN in Hexagonal GaN | | T. F. Kent
; J. Yang
; L. Yang
; M. J. Mills
; R. C. Myers
; | | Date: |
29 Feb 2012 | | Abstract: | Periodic structures of GdN particles encapsulated in a single crystalline GaN
matrix were prepared by plasma assisted molecular beam epitaxy. High resolution
X-ray diffractometery shows that GdN islands, with rock salt structure are
epitaxially oriented to the wurtzite GaN matrix. Scanning transmission electron
microscopy combined with in-situ reflection high energy electron diffraction
allows for the study of island formation dynamics, which occurs after 1.2ML of
GdN coverage. STEM images show evidence for dislocation termination at GdN
nanoparticles. SQUID Magnetometry reveals two ferromagnetic phases, one due to
GdN particles with Curie temperature of 70K and a second, anomalous room
temperature phase. | | Source: | arXiv, 1203.0028 | | Services: | Forum | Review | PDF | Favorites | |
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