Author(s)

Liang-Ming He, Rong Wang, Cai-Liu Yin, San-Jun Peng, Dong Qian

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.
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.

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.

Magnetization; Ising Square Lattice; Nano-Size Subsystem

L. He, R. Wang, C. Yin, S. Peng and D. Qian, "Magnetization of Nano-Size Subsystem in a Two-Dimensional Ising Square Lattice," World Journal of Condensed Matter Physics, Vol. 2 No. 4, 2012, pp. 175-180. doi: 10.4236/wjcmp.2012.24029.