Study on Perovskite Oxides LaFe1－xCrxO3 by EXAFS

WANG Jia-Ou; DU Yong-Hua; Kurash Ibrahim; HONG Cai-Hao; XIE Ya-Ning; HU Tian-Dou

Chinese Physics C> 2007, Vol. 31> Issue(1) : 101-103

Study on Perovskite Oxides LaFe_1－xCr_xO₃ by EXAFS

Lanzhou University, Lanzhou 730000, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

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Abstract：
Perovskite oxides LaFe_1－xCr_xO₃ were synthesized by solid state reaction method. X-ray powder diffraction was tested to characterize the crystalline structure of the samples. The result indicates that the samples are single orthorhombic phase. The lattice parameter decreases with the Chromium concentration. The extend X-ray absorption fine structures (EXAFS) of the Fe K-edge as a function of doping level x show that the Fe-La bonds distance decreases dramatically. This suggests that Lanthanum is very important for the stability of the whole LaFe_1－xCr_xO₃ structure.

References

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WANG Jia-Ou, DU Yong-Hua, Kurash Ibrahim, HONG Cai-Hao, XIE Ya-Ning and HU Tian-Dou. Study on Perovskite Oxides LaFe_1－xCr_xO₃ by EXAFS[J]. Chinese Physics C, 2007, 31(1): 101-103.

WANG Jia-Ou, DU Yong-Hua, Kurash Ibrahim, HONG Cai-Hao, XIE Ya-Ning and HU Tian-Dou. Study on Perovskite Oxides LaFe_1－xCr_xO₃ by EXAFS[J]. Chinese Physics C, 2007, 31(1): 101-103. shu

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Received: 2006-03-14
Revised: 2006-04-03

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沈阳化工大学材料科学与工程学院沈阳 110142

Study on Perovskite Oxides LaFe_1－xCr_xO₃ by EXAFS

Corresponding author: WANG Jia-Ou,

Lanzhou University, Lanzhou 730000, China2 Institute of High Energy Physics, CAS, Beijing 100049, China

Received Date: 2006-03-14
Accepted Date: 2006-04-03
Available Online: 2007-01-05

Abstract: Perovskite oxides LaFe_1－xCr_xO₃ were synthesized by solid state reaction method. X-ray powder diffraction was tested to characterize the crystalline structure of the samples. The result indicates that the samples are single orthorhombic phase. The lattice parameter decreases with the Chromium concentration. The extend X-ray absorption fine structures (EXAFS) of the Fe K-edge as a function of doping level x show that the Fe-La bonds distance decreases dramatically. This suggests that Lanthanum is very important for the stability of the whole LaFe_1－xCr_xO₃ structure.