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 M\"{ o}ssbauer spectroscopy. $^{ 57}$Fe M\"{ o}ssbauer spectra provide a direct evidence of Jahn-Teller distortion in these manganites. On the basis of M\"{ o}ssbauer 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 M\"{ o}ssbauer 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.
Categories: cond-mat.mtrl-sci