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Magnetization of Nano-Size Subsystem in a Two-Dimensional Ising Square Lattice

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Author(s): Liang-Ming He | Rong Wang | Cai-Liu Yin | San-Jun Peng | Dong Qian

Journal: World Journal of Condensed Matter Physics
ISSN 2160-6919

Volume: 02;
Issue: 04;
Start page: 175;
Date: 2012;
Original page

Keywords: Magnetization | Ising Square Lattice | Nano-Size Subsystem

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 J1 > 0 is assigned for the interaction of a pair of nearest-neighbor spins, while 0 J0 J1 for that in regions between the blocks and (J0 + J1)/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 J1 and with the decrease of J1 - J0 for a given J1, but contrarily, the anchoring ability for the initial magnetic orientation in nano-size block trails off as J1 - J0 diminish. This phenomena and size dependence of such anchoring ability are discussed in detail.
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