High temperature investigation of the magnetization behavior in cobalt substituted ZnO

被引：19
作者：
Bhatti, Kanwal Preet [1 ]
Chaudhary, Sujeet [1 ]
Pandya, Dinesh K. [1 ]
Kashyap, Subhash C. [1 ]
机构：
[1] Indian Inst Technol, Dept Phys, Thin Film Lab, New Delhi 110016, India
来源：
JOURNAL OF APPLIED PHYSICS | 2007年 / 101卷 / 03期
关键词：
D O I：
10.1063/1.2432378
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
High temperature magnetization studies (up to 650 degrees C) of the chemically synthesized nanocrystalline Zn0.9Co0.1O samples are reported in this paper. A systematic study of sequentially sintered sample has been carried out to correlate the observed changes in magnetic behavior vis a vis very small changes in the unit-cell dimensions, evolution of cobalt oxide phases, and absence of Co clusters. The Curie temperature of cobalt substituted ZnO is determined to be similar to 495 degrees C. A plausible explanation of the observed room temperature ferromagnetism is presented in terms of bound magnetic polarons model. (c) 2007 American Institute of Physics.
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