TITLE:
Magnetization of Nano-Size Subsystem in a Two-Dimensional Ising Square Lattice
AUTHORS:
Liang-Ming He, Rong Wang, Cai-Liu Yin, San-Jun Peng, Dong Qian
KEYWORDS:
Magnetization; Ising Square Lattice; Nano-Size Subsystem
JOURNAL NAME:
World Journal of Condensed Matter Physics,
Vol.2 No.4,
November
15,
2012
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.