摘要
The influences of W doping at Mn site on the charge order and spin order were studied by measuring M-T curves, M-H curves and ESR spectra of La0.3Ca0.7Mn1?xWxO3 (x = 0.00, 0.04, 0.08, 0.12, 0.15) system. The results showed that: When 0.00≤ x≤0.08, the system exhibits charge ordering (CO) phase, and its spin order experiences the change of paramagnetism (PM)-charge ordering (CO)-antiferro- magnetism (AFM) with decreasing temperature; when x≥0.12, the charge ordering (CO) phase melts, part of charge ordering (CO)phase remains in the paramagnetism (PM)background, the spin order of the system is mainly paramagnetism (PM), and ferromagnetic (FM) clusters appear at low tem- perature.
The influences of W doping at Mn site on the charge order and spin order were studied by measuring M- T curves, M-H curves and ESR spectra of La0.3Ca0.7Mn（1-x）WxO3 （x= 0.00, 0.04, 0.08, 0.12, 0.15） system. The results showed that： When 0.00≤x≤0.08, the system exhibits charge ordering （CO） phase, and its spin order experiences the change of paramagnetism （PM）-charge ordering （CO）-antiferromagnetism （AFM） with decreasing temperature; when x≥0.12, the charge ordering （CO） phase melts, part of charge ordering （CO） phase remains in the paramagnetism （PM） background, the spin order of the system is mainly paramagnetism （PM）, and ferromagnetic （FM） clusters appear at low temperature.
基金
supported by the National Natural Science Foundation of China(Grant No.19934003)
the State Key Project of Fundamental Research of China(No.001CB610604)
