Direct Observation of Charge Ordering in Magnetite Using Resonant Multiwave X-Ray Diffraction

被引:18
作者
Weng, Shih-Chang [1 ]
Lee, Yen-Ru [1 ]
Chen, Cheng-Gang [1 ]
Chu, Chia-Hung [1 ]
Soo, Yun-Liang [1 ]
Chang, Shih-Lin [1 ,2 ]
机构
[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan
[2] Natl Synchrotron Radiat Res Ctr, Hsinchu, Taiwan
关键词
FORBIDDEN REFLECTIONS; VERWEY TRANSITION; FE3O4;
D O I
10.1103/PhysRevLett.108.146404
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Charge disproportion at octahedral Fe sites in magnetite was observed at low temperature using two inversion-symmetry related three-wave resonant x-ray diffraction, 022-311 and 002-(3) over bar (1) over bar 1, near the iron K edge. Both of the three-wave cases involve the (002) forbidden-weak reflection. The self-normalized three-wave to two-wave (002) diffraction intensity ratio automatically cancels the self-absorption effect and leads to direct determination of charge disproportion for magnetite below 120 K. This approach provides a more direct and effective way for extracting charge-ordering information.
引用
收藏
页数:4
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