Effect of oxygen partial pressure on the local structure and magnetic properties of Co-doped ZnO films

被引：25

作者：

Liu, Xue-Chao ^{[1
,2
]}

Shi, Er-Wei ^{[1
]}

Chen, Zhi-Zhan ^{[1
]}

Chen, Bo-Yuan ^{[1
,2
]}

Zhang, Tao ^{[1
]}

Song, Li-Xin ^{[1
]}

Zhou, Ke-Jin ^{[3
]}

Cui, Ming-Qi ^{[3
]}

Yan, Wen-Sheng ^{[4
]}

Xie, Zhi ^{[4
]}

He, Bo ^{[4
]}

Qiang-Wei, Shi ^{[4
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

[3] Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China

[4] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 02期

关键词：

D O I：

10.1088/0953-8984/20/02/025208

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Zn0.95Co0.05O films were prepared under different oxygen partial pressures (Po-2) by inductively coupled plasma enhanced physical vapor deposition. The effect of Po-2 on the local structure and magnetic properties was investigated. The x-ray absorption spectroscopy at the Co K-edge, Co L-edge, and O K-edge revealed that the main defects were oxygen vacancies when the films were deposited under very low Po-2. The change from room-temperature ferromagnetism to paramagnetism was observed with increasing Po-2. It was experimentally demonstrated that the oxygen vacancy defect is absolutely necessary to induce ferromagnetic couplings in Co-doped ZnO films.

引用

页数：5

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