Open AccessStudy on the structural and magnetic properties of La-doped barium ferrites
Author(s) -
Jie Li,
Huaiwu Zhang,
Yuanxun Li,
Qiang Li,
Jianchun Qin
Publication year - 2012
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.61.227501
Subject(s) - coercivity , barium , materials science , barium ferrite , doping , analytical chemistry (journal) , magnetometer , scanning electron microscope , sintering , ferrite (magnet) , saturation (graph theory) , nuclear magnetic resonance , condensed matter physics , metallurgy , composite material , magnetic field , chemistry , physics , optoelectronics , mathematics , chromatography , quantum mechanics , combinatorics
Magnetic properties of La doped M-type barium ferrites are studied. The samples are prepared by the standard solid state reaction method. The influences of La3+ on structures and magnetic properties of barium ferrites (Ba1-xLaxFe12O19) are investigated. Single-phase M-type barium ferrites with chemical composition of Ba1-xLaxFe12O19 (x=0.0—0.6) are formed by sintering at 1100—1175 ℃ in air. Scanning electron microscopy (SEM) reveals that the La doping has no effect on the structure of barium ferrite. Vibrating sample magnetometer (VSM) shows that with the valaue of x increasing, the saturation magnetization (Ms) increases, reaching a maximum at x=0.2 and then decreases and the coercivity of the sample increases continuously. The value of Ms reaches a maximum value of 62.8 emu/g at x=0.2 and 1175 ℃, and the Hc reaches a maximum value of 3911.5 Oe at x=0.6 and 1125℃.