Mössbauer effect probe of local Jahn–Teller distortion in Fe-doped colossal magnetoresistive manganites

Zhao-hua Cheng; Zhi-hong Wang, V.V.; Nai-li Di, V.V.; Zhi-qi Kou, V.V.; Guang-jun Wang, V.V.; Rui-wei Li, V.V.; Yi Lu; Qing-an Li, V.V.; Bao-gen Shen; Dunlap, R.A.
August 2003
Applied Physics Letters;8/25/2003, Vol. 83 Issue 8, p1587
Academic Journal
The local structure of the Fe-doped La[sub 1-x]Ca[sub x]MnO[sub 3] (x=0.00–1.00) compounds has been investigated by means of Mössbauer spectroscopy. [sup 57]Fe Mössbauer spectra provide direct evidence of Jahn–Teller distortion in these manganites. On the basis of the Mössbauer results, the Jahn–Teller coupling was estimated. It is noteworthy that the Ca-concentration dependence of the Jahn–Teller coupling strength is very consistent with the magnetic phase diagram. Our results reveal that Mössbauer spectroscopy cannot only detect the local structural distortion, but also provide a technique to investigate the Jahn–Teller coupling of Fe-doped La[sub 1-x]Ca[sub x]MnO[sub 3] colossal magnetoresistive perovskites. © 2003 American Institute of Physics.


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