Open AccessMAGNETIC VISCOSITY OF CHAIN-SPHERICAL Fe ULTRA-FINE PARTICLES
Author(s) -
Xin Gao,
Li Jin,
Denglu Hou,
Yang Fu,
Zhong Xia-Ping,
Luo He-Lie
Publication year - 1993
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.42.1851
Subject(s) - acicular , materials science , spheres , particle (ecology) , viscosity , anisotropy , chain (unit) , volume (thermodynamics) , condensed matter physics , composite material , thermodynamics , optics , physics , microstructure , oceanography , astronomy , geology
This paper reports the study on the magnetic vicosity for chain-spherical Fe UFP prepared by laser pyrolysis. Fluctuation field,anisotropy and active volume of the particles were measured and calculated. The results show that the reverse magnetizing unit is made up of n chain spheres,and equivalent to a single-domain with uniaxial particle. Variation tendency of active volume of the particles is similiar to the acicular γ-type ferric oxide particles.