Charge order and spin order of La0.3Ca0.7Mn1-xWxO3 system
Charge order and spin order of La0.3Ca0.7Mn（1-x）WxO3 system

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 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.