Magnetic anisotropy study of ion-beam synthesized cobalt nanocrystals | Zendy

J.-K. Lee | Zendy; M. F. Hundley | Zendy; J. D. Thompson | Zendy; R. Schulze | Zendy; Hyun Suk Jung | Zendy; James A. Valdez | Zendy; M. Nastasi | Zendy; X. Zhang | Zendy

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Magnetic anisotropy study of ion-beam synthesized cobalt nanocrystals

Author(s) -

J.-K. Lee,

M. F. Hundley,

J. D. Thompson,

R. Schulze,

Hyun Suk Jung,

James A. Valdez,

M. Nastasi,

X. Zhang

Publication year - 2006

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2364176

Subject(s) - nanocrystal , coercivity , materials science , transmission electron microscopy , amorphous solid , antiferromagnetism , cobalt , magnetic anisotropy , epitaxy , ferromagnetism , layer (electronics) , photoemission spectroscopy , condensed matter physics , crystallography , nuclear magnetic resonance , x ray photoelectron spectroscopy , nanotechnology , magnetization , magnetic field , chemistry , metallurgy , physics , quantum mechanics

The magnetic properties of Co nanocrystals in crystalline Al2 O3 and amorphous Si O2 are investigated. In contrast to the Si O2 matrix, the Al2 O3 matrix provides higher magnetic anisotropy and coercive field for Co nanocrystals. Using x-ray photoemission spectroscopy, it is found that a Co Al2 O4 layer forms in Co implanted region. Transmission electron microscopy shows that this Co Al2 O4 layer is grown epitaxially around Co nanocrystals. The higher coercive field of the Co nanocrystals in Al2 O3 is attributed to the presence of antiferromagnetic Co Al2 O4 layers. © 2006 American Institute of Physics

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