Ferromagnetism induced by hydrogen in polycrystalline nonmagnetic Zn0.95Co0.05O

被引：81

作者：

Deka, Sasanka ^{[1
]}

Joy, P. A. ^{[1
]}

机构：

[1] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 03期

关键词：

D O I：

10.1063/1.2227642

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystalline Zn0.95Co0.05O is found to be paramagnetic at room temperature and down to 12 K. Optical measurements prove the incorporation of Co2+ ions inside the ZnO lattice in the tetrahedral site. When the paramagnetic sample is heated in Ar/H-2 at 1125 K for 2 h, ferromagnetism with a very high value of magnetization is observed at room temperature. Hydrogen reduction does not affect the substituted Co2+ ions inside the wurtzite crystal lattice as evidenced from optical studies. X-ray diffraction studies show the presence of Co metal after the reduction process which is the origin of room temperature ferromagnetism. (c) 2006 American Institute of Physics.

引用

页数：3