Open AccessTHE ANISOTROPY OF γ-Fe2O3 FINE PARTICLES WITH AND WITHOUT CO-DOPING
Author(s) -
LI SHI,
Hanru Shao,
LUO HE-LIE,
LING QI-FEN,
Ke Sun
Publication year - 1982
Publication title -
acta physica sinica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.31.1250
Subject(s) - doping , materials science , coercivity , anisotropy , condensed matter physics , optics , optoelectronics , physics
In this report, the γ-Fe2O3 fine particles with Co-doping was investigated by means of M?ssbauer effect of 57Fe.The experimental result indicates that the effective anisotropy constant of the γ-Fe2O3 fine particles doped with Co is about 30% greater than that of the superfine γ-Fe2O3 powder without Co. It provides a further explanation to the increasing of the coercivity of the ordinary needle γ-Fe2O3 powder with Co-doping.
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