Open AccessStudy of ferromagnetic semiconductor films: Ti1－xCoxO2
Author(s) -
Hongqiang Song,
Yanxue Chen,
Miaojuan Ren,
Gang Ji
Publication year - 2005
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.54.369
Subject(s) - materials science , ferromagnetism , squid , curie temperature , saturation (graph theory) , magnetic semiconductor , condensed matter physics , semiconductor , magnetic moment , spectroscopy , annealing (glass) , magnetization , analytical chemistry (journal) , nuclear magnetic resonance , magnetic field , optoelectronics , physics , chemistry , metallurgy , ecology , mathematics , chromatography , combinatorics , quantum mechanics , biology
Co-doped TiO2 ferromagnetic semiconductor flms were prepared by rf co-sputteri ng method and then annealed in vacuum at 300℃ for 2 h. Superconducting quantum interference device (SQUID) measurements indicate that the samples are ferromagn etic and the Curie temperature is above 300K. The saturation magnetization, coer civity, and saturation field are 55emu/cm3, 400×80A/m and 1500×80A/m at room temperature, respectively. And the magnetic moment was observed to be 0679 μB/Co. No pure Co metal grains were found by x-ray diffraction and x-ray p hotoemission spectroscopy measurements.