Mitra, Sreemanta ; Mandal, Amrita ; Datta, Anindya ; Banerjee, Sourish ; Chakravorty, Dipankar (2012) Enhanced magnetic anisotropy of nickel nanosheet prepared in Na-4 mica Journal of Magnetism and Magnetic Materials, 324 (16). pp. 2452-2457. ISSN 0304-8853
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jmmm.2012.03.004
Abstract
Nanosheets of nickel with thickness equal to 0.6 nm have been grown within the interlayer spaces of Na-4 mica. The sheets are made up of percolative clusters of nanodisks. Magnetization characteristics indicate a superparamagnetic behavior with a blocking temperature of 428 K. The magnetic anisotropy constant as extracted from the coercivity data has been found to be higher than that of bulk nickel by two orders of magnitude. This is ascribed to a large aspect ratio of the nickel nanophase. The Bloch exponent is also found to be considerably different from that of bulk nickel because of a size effect. The Bloch equation is still found to be valid for the two dimensional structures.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Nickel Nanosheet; Enhanced Magnetic Anisotropy |
| ID Code: | 96491 |
| Deposited On: | 21 Dec 2012 10:07 |
| Last Modified: | 21 Dec 2012 10:07 |
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