论文标题
360 $^{\ circ} $域墙的barkhausen噪声中的薄膜薄膜无序
Barkhausen noise from formation of 360$^{\circ}$ domain walls in disordered permalloy thin films
论文作者
论文摘要
无序铁磁体中的Barkhausen噪声通常被理解为主要源于域壁的野外运动运动。我们使用微磁模拟研究了无序的薄膜薄膜中的磁化反转过程，并发现磁化逆转过程包括通过一系列局部化磁性旋转事件逐渐形成不动的360 $^{\ circ} $域壁壁。样品中形成的360 $^{\ Circ} $域壁的密度以及Barkhausen跳跃的统计特性由混乱强度控制。
Barkhausen noise in disordered ferromagnets is typically understood to originate primarily from jerky field-driven motion of domain walls. We study the magnetization reversal process in disordered permalloy thin films using micromagnetic simulations, and find that the magnetization reversal process consists of gradual formation of immobile 360$^{\circ}$ domain walls via a sequence of localized magnetization rotation events. The density of 360$^{\circ}$ domain walls formed within the sample as well as the statistical properties of the Barkhausen jumps are controlled by the disorder strength.
