Open AccessStudies on structure and magnetic properties of uniaxial M-type SrFe12-x 12-xCrxxO1919 hexaferrite nano-crystalline
Author(s) -
QingQing Fang,
Jiao Yong-Fang,
Rui Li,
Jinzhi Wang,
Chi Wai Hui
Publication year - 2005
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.54.1826
Subject(s) - materials science , coercivity , doping , phase (matter) , analytical chemistry (journal) , magnetization , hexagonal crystal system , crystallography , nuclear magnetic resonance , condensed matter physics , chemistry , magnetic field , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics
SrFe12-x12-xCrxxO1919 (x=0—10) hexaferri te nanoparticles have been fabricated using a sol-gel technique for perpendicular magnetic recording. Experimental results have shown that the values of specific saturation mag netization, σss, increase for x≤04 as the Cr doping content incre ases, and reach maximum at x=02, while the coercivity, Hcc, decreas es for x05 This feature is favorable to magnetic recording. It is also fou nd that the α-Fe22O33 non-magnetic phase appears after x=06 and remai ns to be a hexagonal magnetoplumbite phase for x=0—04 Magnetic measurem ents have revealed that Cr substitution can decrease the magnetization and incre ase the peak-widening for Hopkinson peak when doped with Cr3+3+.