Zn0.9Co0.1O-based diluted magnetic semiconducting thin films

被引：299

作者：

Ramachandran, S ^{[1
]}

Tiwari, A ^{[1
]}

Narayan, J ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Mat Sci & Engn, NSF Ctr Adv Mat & Smart Struct, Raleigh, NC 27695 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 25期

关键词：

D O I：

10.1063/1.1764936

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Here we report a systematic study of structural, optical, and magnetic measurements on epitaxial Zn0.9Co0.1O films grown on c-plane sapphire single crystal, at various temperatures (500-650degreesC), using pulsed-laser deposition. The main emphasis in this work has been on the correlation of microstructure with properties, specifically with magnetic properties and the fate of cobalt ions into substitutional sites versus precipitates. The reasons for room-temperature ferromagnetism are explored, and convincingly proved to be one of the inherent properties of the material. Most importantly, the presence of nanoclusters of any magnetic phase was ruled out. This was determined by high-resolution transmission electron microscopy, coupled with electron energy loss spectroscopy and STEM-Z (scanning transmission electron microscopy-atomic number) contrast studies. (C) 2004 American Institute of Physics.

引用

页码：5255 / 5257

页数：3

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