Structure and magnetic properties of co-sputtered Co-C thin films

被引：44

作者：

Konno, TJ ^{[1
]}

Shoji, K ^{[1
]}

Sumiyama, K ^{[1
]}

Suzuki, K ^{[1
]}

机构：

[1] Tohoku Univ, Inst Mat Res, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 195卷 / 01期

关键词：

cobalt-carbon system; nano-granular morphology; magnetic granular films; sputter-deposition; transmission electron microscopy;

D O I：

10.1016/S0304-8853(98)01160-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We studied the structure and magnetic properties of co-sputtered Co1-xCx thin films using a transmission electron microscope (TEM) and a SQUID magnetometer. These properties were found to depend critically on deposition temperature, T-s, and composition, x. Generally, phase separation into metallic Co and graphite-like carbon phases proceeds with increasing T-s and decreasing x. Plan view and cross-sectional TEM images of the films prepared showed that Co grains about 10-20 nm in diameter and 30-50 nm in height are three-dimensionally separated by graphite-like carbon layers 1-2 nm thick. Optimum magnetic properties with saturation magnetization of 380 emu/cc and coercivity of 400 Oe were obtained for a film with x = 0.5 and T-s = 350 degrees C. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：9 / 18

页数：10

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