Direct Observation of Domain Wall Motion Induced by Low-Current Density in TbFeCo Wires
Direct Observation of Domain Wall Motion Induced by Low-Current Density in TbFeCo Wires
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DOI：
10.1143/apex.4.093002
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发表时间：
2011-09-01
影响因子：
2.3
通讯作者：
Awano, Hiroyuki
中科院分区：
文献类型：
--
作者：
Ngo, Duc-The;Ikeda, Kotato;Awano, Hiroyuki
克尔偏振光学显微镜直接观察到由高达 4.97 x 10(10) A/m(2) 的低电流密度引起的 TbFeCo 线中磁畴壁 (DW) 的运动。临界电流密度随导线宽度略有增加，从 800 nm 宽度导线的 4.97 x 10(10) A/m(2) 到 1500 nm 宽度导线的 6.16 x 10(10) A/m(2)。 DW 速度估计为 28 +/- 2 m/s，并且主要与线宽无关。增加电流密度会导致壁速度增加至 59 +/- 4 m/s。这些发现表明 TbFeCo 纳米线是低能量、快速访问 DW 控制设备的绝佳候选者。 (C) 2011 日本应用物理学会
The motion of magnetic domain walls (DWs) in TbFeCo wires induced by low-current density up to 4.97 x 10(10) A/m(2) has been directly observed by Kerr polarized optical microscopy. The critical current density slightly increases with wire width, from 4.97 x 10(10) A/m(2) for 800-nm-width wires to 6.16 x 10(10) A/m(2) for 1500-nm-width wires. DW velocity is estimated to be 28 +/- 2 m/s, and mostly independent on the wire width. Increasing current density results in an increase of the wall velocity up to 59 +/- 4 m/s. These findings indicate that TbFeCo nanowire is an excellent candidate for low-energy, fast accessing DW-controlled devices. (C) 2011 The Japan Society of Applied Physics