The structural diversity and properties of NbxMo1-xO2

被引:2
|
作者
Ji, Yu [1 ,2 ]
Wang, Huaixiang [1 ]
Li, Xiangfei [1 ,2 ]
Meng, Ying [1 ,2 ]
Wang, Yong [3 ]
Ye, Xubin [1 ]
Liu, Zhehong [1 ]
Wang, Luyao [1 ,2 ]
Yang, Junkai [1 ,2 ]
Guo, Qinwen [1 ,2 ]
Zhuang, Haoyu [1 ,2 ]
Shen, Xi [1 ]
Kao, Cheng-Wei [4 ]
Chan, Ting-Shan [4 ]
Hu, Zhiwei [5 ]
Yang, Hua [3 ]
Long, Youwen [1 ,2 ]
Yu, Richeng [1 ,2 ,6 ]
机构
[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[3] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
[4] Natl Synchrotron Radiat Res Ctr, 101 Hsin Ann Rd, Hsinchu 30076, Taiwan
[5] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany
[6] Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
NbxMo1-xO2; Transmission electron microscopy; Crystal structure; Transport and magnetic properties; TRANSITION; DIFFRACTION;
D O I
10.1016/j.jssc.2023.124285
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
We synthesized NbxMo1-xO2 series compounds and determined the structure of each component through x-ray diffraction and selected area electron diffraction techniques. For x=0.05, 0.1, 0.2, they possess room temperature MoO2 monoclinic structure (P21/c); for x=0.25, 0.3, they become to body-centered tetragonal structure (I41/a); for x=0.33, 0.6, 0.65, they further turn to TiO2 rutile-type structure (P42/mnm). Nb0.25Mo0.75O2 has transport and magnetic properties similar to those of NbMoO4 as paramagnetic metal. Moreover, the UV-vis spectra indicate the metallic property of Nb0.05Mo0.95O2, Nb0.25Mo0.75O2, and Nb0.6Mo0.4O2. X-ray absorption spectra at the Mo-L3 and Nb-L3 edges present Mo4+/Nb4+ and Mo4+/Nb5+ valence state for Nb0.25Mo0.75O2 and Nb0.05Mo0.95O2, respectively. This means the latter can be descripted as Nb0.05Mo0.95O2+& delta; with & delta; = 0.025.
引用
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页数:5
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