Spintronics in metal-insulator nanogranular magnetic thin films
Spintronics in metal-insulator nanogranular magnetic thin films
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DOI：
10.1016/j.jmmm.2006.02.005
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发表时间：
2006-09-01
影响因子：
2.7
通讯作者：
Masumoto, Tsuyosi
中科院分区：
文献类型：
--
作者：
Fujimori, Hiroyasu;Ohnuma, Shigehiro;Masumoto, Tsuyosi
通过介绍我们最近的结果，从自旋电子学的角度概述了金属绝缘体纳米颗粒薄膜的磁和电特性。 (1)富金属铁磁体具有超高频(MHz-GHz)磁导率mu'、mu''，主要是由于大的感应磁各向异性场H-k。它们可用于各种磁性器件，例如薄膜电感器和噪声抑制器。 (2)富含绝缘体的超顺磁性材料表现出隧道型磁阻，在(Mg或Al)-氟化物基膜中表现出较大的磁阻。具有改进的场灵敏度的颗粒间隙 (GIG) 器件对于极低磁场传感器非常有用。 (C) 2006 Elsevier B.V. 保留所有权利。
Magnetic and electrical properties of metal-insulator nanogranular thin films are overviewed, from the spintronics point of view, by presenting our recent results. (1) The metal-rich ferromagnetic ones possess ultrahigh-frequency (MHz-GHz) permeabilities mu', mu '', mainly owing to large induced magnetic anisotropy field H-k. They are useful for various magnetic devices, such as thin-film inductors and noise suppressors. (2) The insulator-rich superpramagnetic ones exhibit tunnel-type magnetoresistance, being large in (Mg or Al)-fluoride base films. The Granular-In-Gap (GIG) devices with improved field sensitivity are useful for very low magnetic-field sensors. (C) 2006 Elsevier B.V. All rights reserved.