Ferromagnetism Induced by Oxygen Vacancies in Zinc Peroxide Nanoparticles

被引：41

作者：

Gao, Daqiang ^{[1
]}

Zhang, Jing ^{[1
]}

Yang, Guijin ^{[1
]}

Qi, Jing ^{[1
]}

Si, Mingsu ^{[1
]}

Xue, Desheng ^{[1
]}

机构：

[1] Lanzhou Univ, Key Lab Magnetism & Magnet Mat MOE, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 33期

关键词：

ROOM-TEMPERATURE; MAGNETIC-PROPERTIES; ZNO; TRANSPARENT; CAO;

D O I：

10.1021/jp201741m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

A correlation between oxygen vacancies and the magnetization for pure zinc peroxide nanoparticles (similar to 7 nm) synthesized by the hydrothermal method is demonstrated. Occurrence of room temperature ferromagnetism for zinc peroxide nanopartides is established by the observed hysteresis loops and the ferromagnetic resonance signal. X-ray photoelectron spectroscopy and photoluminescence results reveal the oxygen insufficiency in the samples. The variation of oxygen vacancies concentration is consistent with the changes of the saturation magnetization for the samples. Combining with the results of electron spin resonance, it is suggested that the singly occupied oxygen vacancies forming the F+ centers play the key role in the exchange mechanism.

引用

页码：16405 / 16410

页数：6

共 51 条

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Magnetic effects of defect pair formation in ZnO [J].