A STUDY ON THE COERCIVITY OF Co-ABSORBED γ-Fe2O3 POWDER | Zendy

LUO HE-LIE | Zendy; Ke Sun | Zendy; FENG YAN-BIN | Zendy; Gong Wei | Zendy; Zhang Zhiying | Zendy

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A STUDY ON THE COERCIVITY OF Co-ABSORBED γ-Fe2O3 POWDER

Author(s) -

LUO HE-LIE,

Ke Sun,

FENG YAN-BIN,

Gong Wei,

Zhang Zhiying

Publication year - 1981

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.30.642

Subject(s) - coercivity , materials science , epitaxy , doping , ferrite (magnet) , condensed matter physics , nuclear magnetic resonance , composite material , layer (electronics) , optoelectronics , physics

Co-absorbed γ-Fe2O3 magnetic powder is divided into two sorts: Co-doped γ-Fe2O3 (known as Co-γ-Fe2O3) and Co-ferrite epitaxial γ-Fe2O3 (known as CoFe-γ-Fe2O3). The coercivity of Co-absorbed γ-Fe2O3 is 100 to 400 (Oe) greater than the coercivity of γ-Fe2O3.The causes of the increasing coercivity of Co-absorbed γ-Fe2O3 were studied. The mechanism of increasing coercivity is different between the two sorts of powder: Co (OH)2 formed on the surface of γ-Fe2O3 raised its surface anisotrpy and the coercivity of Co-γ-Fe2O3 is increased. The cause of increasing coercivity of CoFe-γ-Fe2O3 is the coupling effect between the Co-ferrite epitaxial layer and γ-Fe2O3.

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