Noninvasive magnetic imaging and magnetization measurement of isolated mesoscopic Co rings
Noninvasive magnetic imaging and magnetization measurement of isolated mesoscopic Co rings
复制标题
孤立介观Co环的无创磁成像和磁化强度测量
DOI：
10.1063/1.1518564
复制
发表时间：
2002
影响因子：
4
通讯作者：
V. Metlushko
中科院分区：
文献类型：
--
作者：
J. Bekaert;D. Buntinx;C. Haesendonck;V. Moshchalkov;J. Boeck;G. Borghs;V. Metlushko
一个高分辨率的扫描霍尔探针显微镜被用来作为一种非侵入性的技术来可视化的磁化反转在一个阵列的微米尺寸的Co环。为了排除环元间偶极-偶极相互作用对再磁化过程的影响，在霍尔磁强计上沉积了一个孤立的Co环，并解决了从洋葱态到涡旋态以及从涡旋态到相反极性的洋葱态的急剧转变。我们的研究结果得到了MOKE磁化测量和微磁学模拟的支持。
A high-resolution scanning Hall probe microscope was used as a noninvasive technique to visualize the magnetization reversal in an array of micron-size Co rings. Two stable “onion” states at remanence and “vortex” states at switching fields were found. To rule out a possible influence of dipole–dipole interaction between ring elements on remagnetization processes, an isolated Co ring was deposited on top of a Hall magnetometer and extremely sharp transitions from onion to vortex and from vortex to onion state of opposite polarity were resolved. Our results were supported by MOKE magnetization measurements and micromagnetic simulations.