CAJ | 학술논문

讨论了磁纳米线阵列中静磁相互作用导致的交换偏置问题.采用伊辛模型并利用蒙特卡洛方法比较了三角点阵纳米线阵列上不同反转比下的静磁相互作用能和形状各向异性能的大小.根据斯通纳-沃尔法斯模型,交换偏置场主要来自偶极相互作用场.计算表明,交换偏置场随反转比增大相比最大值下降很快.纳米线长度涨落对体系的交换偏置影响很小.分析了实验中对实际纳米线阵列观察不到明显交换偏置现象的原因.
토론료자납미선진렬중정자상호작용도치적교환편치문제.채용이신모형병이용몽특잡락방법비교료삼각점진납미선진렬상불동반전비하적정자상호작용능화형상각향이성능적대소.근거사통납-옥이법사모형,교환편치장주요래자우겁상호작용장.계산표명,교환편치장수반전비증대상비최대치하강흔쾌.납미선장도창락대체계적교환편치영향흔소.분석료실험중대실제납미선진렬관찰불도명현교환편치현상적원인.
The problem of whether the magnetostatic interaction will result in the exchange bias phenomenon in magnetic nanowire arrays is studied. The strength comparison of the magnetostatic interaction and the shape anisotropy is made by using Ising model and Monte Carlo method for triangular lattices with various spin flipping ratios. According to the Stoner-Wolfforth model, the exchange bias field comes from the dipole interaction field. Calculations show that the exchange bias field decreases greatly compared to the maximum value as the flipping ratio increases. The calculations also show that the effects of nanowire length fluctuation on the exchange bias of the system are small. The explanation for why there is no obvious exchange bias phenomenon in actual nanowire arrays is proposed.