期刊论文

Zhou Weiping;Tan Weishi

英文

物理化学学报

1000-6818

2018

34

4

437-444

10.3866/PKU.WHXB201709043

Received: August 18, 2017; Revised: August 31, 2017; Accepted: August 31, 2017; Published online: September 4, 2017. *Corresponding authors. Email: wpzhou@njust.edu.cn; Tel.: +86-25-84303370 (ZHOU W. P.). Email: tanweishi@njust.edu.cn; Tel.: +86-25-84303380 (TAN W. S.). The project was supported by the National Natural Science Foundation of China (U1332106, 11604147, 11604067) and Scientific Research Innovation Projects of Jiangsu Province for University Graduate Students, China (CXLX13_179). 国家自然科学基金(U1332106, 11604147, 11604067)和江苏省普通高校研究生科研创新项目(CXLX13_179)资助

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The MgO(110) single crystals were neutron-irradiated with different doses ranging from 1.0×1016 to 1.0×1020 cm−2. The isointensity profiles of the X-ray diffuse scattering caused by the cubic and double-force point defects in MgO were calculated on the basis of the Huang scattering theory. The X-ray diffuse scattering and the UV-Vis absorption spectra were recorded to investigate the point defect configurations in the MgO(110) crystals. Furthermore, the magnetic properties were characterized by a superconducting quantum interference device m...

对MgO(110)单晶进行中子辐照,辐照剂量从1.0×10~(16)到1.0×10~(20)cm~(-2).基于黄昆漫散射理论,我们计算了MgO晶体中的立方缺陷和偶极力缺陷引起的X射线漫散射强度分布图.通过X射线漫散射及紫外-可见光(UV-Vis)吸收光谱实验表征了晶体的点缺陷组态,并利用超导量子干涉仪(SQUID)测量了样品的磁性.w-2θ摇摆曲线说明MgO单晶经中子辐照后产生了晶格畸变,晶体中存在一定浓度的点缺陷.倒易空间图(RSM)显示中子辐照的MgO单晶存在漫散射现象.与计算得到的漫散射分布图对比分析可知,中子辐照的MgO(110)单晶中产生了弗仑克尔缺陷.UV-Vis吸收光谱表明所有辐照晶体中存在阴离子单空位缺陷.辐照剂量较高(1...