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Magnetic anisotropy study of ion-beam synthesized cobalt nanocrystals

Lee, JK and Hundley, MF and Thompson, JD and Schulze, RK and Jung, HS and Valdez, JA and Nastasi, M and Zhang, X (2006) Magnetic anisotropy study of ion-beam synthesized cobalt nanocrystals. Applied Physics Letters, 89 (18). ISSN 0003-6951

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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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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Hundley, MF
Thompson, JD
Schulze, RK
Jung, HS
Valdez, JA
Nastasi, M
Zhang, X
Date: 13 November 2006
Date Type: Publication
Journal or Publication Title: Applied Physics Letters
Volume: 89
Number: 18
DOI or Unique Handle: 10.1063/1.2364176
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0003-6951
Date Deposited: 14 May 2014 16:35
Last Modified: 02 Feb 2019 14:55


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