纳米磁体阵列中的能量最小化和AC退磁
Energy minimization and AC demagnetization in a nanomagnet array
摘要：
我们研究了交流退磁的挫折阵列的单域铁磁岛，详尽地解决每一个（伊辛）磁自由度的系统。虽然阵列的净力矩通过具有足够小的步长的协议而接近零，但是去磁阵列的最终静磁能对于更精细的步进协议继续减小，并且不外推到基态能量。由此产生的复杂无序磁态可以用最大熵系综来描述，该系综仅满足最近邻关联。
英文摘要：
We study AC demagnetization in frustrated arrays of single-domain ferromagnetic islands, exhaustively resolving every (Ising-like) magnetic degree of freedom in the systems. Although the net moment of the arrays is brought near zero by a protocol with sufficiently small step size, the final magnetostatic energy of the demagnetized array continues to decrease for finer-stepped protocols and does not extrapolate to the ground state energy. The resulting complex disordered magnetic state can be described by a maximum-entropy ensemble constrained to satisfy just nearest-neighbor correlations.
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