Kerr microscopy observations of magnetization process in microfabricated ferromagnetic wires
Kerr microscopy observations of magnetization process in microfabricated ferromagnetic wires
复制标题
微加工铁磁线磁化过程的克尔显微镜观察
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
T. Kawagoe
中科院分区：
文献类型：
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作者：
Y. Yokoyama;Yoshikazu Suzuki;S. Yuasa;K. Ando;K. Shigeto;T. Shinjo;P. Gogol;J. Miltat;A. Thiaville;T. Ono;T. Kawagoe
用克尔显微镜观察了微加工NiFe丝的磁化过程。磁线由20 nm厚的NiFe膜通过使用剥离技术制成。它们的宽度W和长度L分别设计为W=0.5、1.0和2.0 μm和L=50 μm。 导线的一端连接到具有2W侧边的方形头部，其被设计成用作畴壁源。在每根线中，引入具有0.2W、0.6W和0.8W的不同宽度的颈部作为畴壁的人工钉扎位点。利用油浸透镜（NA=1.3）和汞灯，在0.5 μm的极细金属丝中，可以清楚地观察到磁化反转现象。证实了畴壁穿透、钉扎、脱钉以及畴壁运动的方向都是可控的，使用具有优化宽度的方形头部和颈部。
The magnetization process in microfabricated NiFe wires was observed using a Kerr microscope. Magnetic wires were made from a 20-nm-thick NiFe film by using lift-off techniques. Their width W and length L were designed as W=0.5, 1.0 and 2.0 μm and L=50 μm, respectively. One end of the wire was connected to a square shaped head with a side of 2W, which is designed to act as a domain wall source. In each wire, necks with different width of 0.2W, 0.6W, and 0.8W were introduced as artificial pinning sites of a domain wall. By using an oil-immersion lens (NA=1.3) and a Hg lamp, magnetization reversals in very narrow wires, as narrow as 0.5 μm, were clearly observed. It is confirmed that domain wall penetration, pinning, depinning, and also the direction of wall motion are controllable using square shaped head and necks with optimized width.