In:
Acta Physica Sinica, Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences, Vol. 30, No. 5 ( 1981), p. 642-
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
1000-3290
,
1000-3290
Language:
Unknown
Publisher:
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Publication Date:
1981
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