Dynamic isomer shift in charge-ordering manganite Y(0.5)Ca(0.5)MnO(3): Mössbauer spectroscopy study.
We report the Mössbauer spectroscopy study on Fe-doped charge-ordering manganite Y(0.5)Ca(0.5)MnO(3). The dynamic isomer shift is observed for charge-ordering manganite, and its origin may be due to strong Jahn-Teller distortions in Y(0.5)Ca(0.5)MnO(3), causing electron-phonon coupling. The evolution of Mössbauer spectroscopy as a function of temperature shows two different phases with significantly different quadrupole splitting values below the charge-ordering transition temperature. This confirms that there exist two different Mn sites (i.e., Mn(3+) and Mn(4+) ions), which can be identified by the microscopic method of Mössbauer spectroscopy.
Tian
H W
HW
Zheng
W T
WT
Zheng
B
B
Wang
X
X
Wen
Q B
QB
Ding
T
T
Zhao
Z D
ZD