MOTION OF A MAGNETIC DOMAIN-WALL TRAVERSED BY FAST-RISING CURRENT PULSES
MOTION OF A MAGNETIC DOMAIN-WALL TRAVERSED BY FAST-RISING CURRENT PULSES
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DOI：
10.1063/1.351045
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发表时间：
1992-03-15
影响因子：
3.2
通讯作者：
BERGER, L
中科院分区：
文献类型：
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作者：
BERGER, L
在金属铁磁体薄膜中，布洛赫壁在短上升时间小于或等于20 ns、长下降时间的电流脉冲作用下将发生有限的位移。在厚度为85-150 nm的Ni-Fe薄膜中，峰值电流密度为-1×10(7)A/cm2的脉冲有望引起0.1-1-mU-m量级的壁位移。这一效应源于S与d的交换作用。它在现象上类似于众所周知的布洛赫壁在硬轴磁场快速上升的脉冲作用下的“壁流”运动。这种效应与磁畴壁的动量表达式中存在一个新的电流感生项有关。
A Bloch wall is predicted to undergo finite displacements when traversed by a current pulse with short rise time less-than-or-equal-to 20 ns and long fall time, in thin films of metallic ferromagnets. In Ni-Fe films of thickness 85-150 nm, pulses with peak current density congruent-to 1 x 10(7) A/cm2 are expected to induce wall displacements of order 0.1-1-mu-m. This effect originates from the s-d exchange interaction. It is phenomenologically similar to the well-known "wall streaming" motion of Bloch walls subjected to fast-rising pulses of hard-axis magnetic field. The effect is related to the existence of a novel, current-induced, term in the expression for the momentum of a magnetic domain wall.