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24 April 2024

» arxiv » cond-mat/0307691

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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 ;
Date:	29 Jul 2003
Subject:	Materials Science \| cond-mat.mtrl-sci
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.
Source:	arXiv, cond-mat/0307691
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