Point defects and magnetic properties of neutron irradiated MgO single crystal

被引：8

作者：

Cao, Mengxiong ^{[1
]}

Ma, Yaru ^{[1
]}

Wang, Xingyu ^{[1
]}

Ma, Chunlin ^{[1
]}

Zhou, Weiping ^{[1
]}

Wang, Xiaoxiong ^{[1
]}

Tan, Weishi ^{[1
]}

Du, Jun ^{[2
]}

机构：

[1] Nanjing Univ Sci & Technol, Dept Appl Phys, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

AIP ADVANCES | 2017年 / 7卷 / 05期

基金：

中国国家自然科学基金;

关键词：

X-RAY-DIFFRACTION;

D O I：

10.1063/1.4973942

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

(100)-oriented MgO single crystals were irradiated to introduce point defects with different neutron doses ranging from 1.0 x 10(16) to 1.0 x 10(20) cm(-2). The point defect configurations were studied with X-ray diffuse scattering and UV-Vis absorption spectra. The isointensity profiles of X-ray diffuse scattering caused by the cubic and double-force point defects in MgO were theoretically calculated based on the Huang scattering theory. The magnetic properties at different temperature were measured with superconducting quantum interference device (SQUID). The reciprocal space mappings (RSMs) of irradiated MgO revealed notable diffuse scattering. The UV-Vis spectra indicated the presence of O Frenkel defects in irradiated MgO. Neutron-irradiated MgO was diamagnetic at room temperature and became ferromagnetic at low temperature due to O Frenkel defects induced by neutron-irradiation. (C) 2017 Author(s).

引用

页数：7

共 20 条

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