Open AccessInfluences of W doping at Mn site on magnetic structure of La0.3Ca0.7MnO3 system
Author(s) -
Huanyin Guo,
Ning Liu,
Zhipeng Cai,
Yuheng Zhang
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.865
Subject(s) - doping , ferromagnetism , materials science , crystallite , paramagnetism , charge ordering , condensed matter physics , phase (matter) , analytical chemistry (journal) , phase transition , manganite , charge (physics) , chemistry , physics , optoelectronics , quantum mechanics , metallurgy , organic chemistry , chromatography
The influences of W doping at Mn site on the magnetic structure of the charge-ordering system La0.3Ca0.7MnO3 are studied by the measurements of M_T curves,M_H curves and ESR spectra of polycrystalline samples of La0.3Ca0.7Mn1-xWxO3(x=0.00,0.04,0.08,0.12,0.15) are studied. The results show that when the doping amount is 0.00≤x≤0.08, the charge-ordering(CO) phase exists in the system, the AFM/CO states coexist below the transition temperature, and the charge-ordering temperature Tco goes up with the increase of W doping content. For the sample of x=0.04, FM phase and AFM/CO phases coexist at low temperature, and FM is separated from PM both before and after the formation of CO phase; when x≥0.12, CO state melts, and the paramagnetism-ferromagnetism (PM-FM) transition exists at extremely low temperature.