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Mössbauer Effect Probe of Local Jahn-Teller distortion in Fe-doped Colossal Magnetoresistive Manganites

Zhao-hua Cheng·Zhi-hong Wang·Nai-li Di·Zhi-qi Kou·Guang-jun Wang·Rui-wei Li·Yi Lu·Qing-an Li·Bao-gen Shen·R. A. Dunlap
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Abstract

Local structure of the Fe-doped La$_{1-x}$Ca$_{x}$MnO$_{3}$ (x=0.00-1.00) compounds has been investigated by means of Mössbauer spectroscopy. $^{57}$Fe Mössbauer spectra provide a direct evidence of Jahn-Teller distortion in these manganites. On the basis of Mössbauer results, the Jahn-Teller coupling was estimated. It is noteworthy that Ca-concentration dependence of Jahn-Teller coupling strength is very consistent with the magnetic phase diagram. Our results reveal that Mössbauer spectroscopy can not only detect the local structural distortion, but also provide a technique to investigate Jahn-Teller coupling of Fe-doped La$_{1-x}$Ca$_{x}$MnO$_{3}$ colossal magnetoresistive perovskites.

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Zhao-hua Cheng, Zhi-hong Wang, Nai-li Di, Zhi-qi Kou, Guang-jun Wang, Rui-wei Li, Yi Lu, Qing-an Li, Bao-gen Shen, R. A. Dunlap. 2003-07-29. Mössbauer Effect Probe of Local Jahn-Teller distortion in Fe-doped Colossal Magnetoresistive Manganites. https://doi.org/10.1063/1.1605232

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