Magnetic and electrical properties of Fe-MoOx (2 ≤ x ≤ 3) granular thin films

被引：3
作者：
Ishii, D
Koyano, M
Katayama, S
Higashimine, K
Ohtsuka, N
机构：
[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292, Japan
[2] Japan Adv Inst Sci & Technol, Ctr New Mat, Tatsunokuchi, Ishikawa 9231292, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 238卷 / 2-3期
关键词：
granular thin film; sputtering; molybdenum oxide; giant magnetoresistance; spin-disorder scattering; tunneling;
D O I：
10.1016/S0304-8853(01)00858-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have synthesized for the first time the new granular system Fe-MoOx (2less than or equal toxless than or equal to3) by using a sputtering technique. The magnetic measurements reveal that the granular films exhibit superparamagnetism and the interface of the iron granules is oxidized partially. Negative magnetoresistance is observed at low temperatures for the Fe-MoOx (xsimilar to2),granular thin films synthesized under reducing atmosphere. The behavior of the negative magneto resistance strongly depends on the ratio of the Fe to the MoOx. It is suggested that the electronic conduction is mainly due to the spin-dependent tunneling through the oxidized interface between the granules and the matrix. (C) 2002 Elsevier Science B.V. All rights reserved.
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收藏
页码：173 / 177
页数：5
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