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Magnetization of Nano-Size Subsystem in a Two-Dimensional Ising Square Lattice
College of Science, Guangxi University for Nationalities, Nanning, China; Guangxi Key Laboratory of Hybrid Computational and IC Design Analysis, Nanning, China
Guangxi Key Laboratory of Hybrid Computational and IC Design Analysis, Nanning, China
College of Science, Guangxi University for Nationalities, Nanning, China; Guangxi Key Laboratory of Hybrid Computational and IC Design Analysis, Nanning, China
College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, China
College of Chemistry and Chemical Engineering, Central South University, Changsha, China
- 1 College of Science, Guangxi University for Nationalities, Nanning, China; Guangxi Key Laboratory of Hybrid Computational and IC Design Analysis, Nanning, China
- 2 Guangxi Key Laboratory of Hybrid Computational and IC Design Analysis, Nanning, China
- 3 College of Science, Guangxi University for Nationalities, Nanning, China; Guangxi Key Laboratory of Hybrid Computational and IC Design Analysis, Nanning, China
- 4 College of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha, China
- 5 College of Chemistry and Chemical Engineering, Central South University, Changsha, China
World Journal of Condensed Matter Physics·Volume 02 (2012)·Pages 175–180·Published 15 November 2012·DOI10.4236/wjcmp.2012.24029
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Abstract
A two-dimensional Ising square lattice is modeled as a nano-size block array to study by Monte Carlo simulation the magnetic thermal stability of nano-structure magnetic media for data storage, thereon in the blocks J 1 > 0 is assigned for the interaction of a pair of nearest-neighbor spins, while 0 J 0 J 1 for that in regions between the blocks and (J 0 + J 1 )/2 for the nearest-neighbor pairs with one in the block and the other one out of but near-most the block. We show that the magnetic thermal stability of the block accrues with the increase of J 1 and with the decrease of J 1 - J 0 for a given J 1 , but contrarily, the anchoring ability for the initial magnetic orientation in nano-size block trails off as J 1 - J 0 diminish. This phenomena and size dependence of such anchoring ability are discussed in detail.
KeywordsMagnetizationIsing Square LatticeNano-Size Subsystem
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