Title :
Atmospheric Plasma Sprayed Cobalt Ferrite Coatings for Magnetostrictive Sensor Applications
Author :
Liang, S. ; Ravi, B.G. ; Sampath, S. ; Gambino, R.J.
Author_Institution :
Mater. Sci. & Eng. Dept., Stony Brook Univ., NY
fDate :
6/1/2007 12:00:00 AM
Abstract :
Cobalt ferrite powder was synthesized by chemical co-precipitation followed by a heat treatment at 1100 degC for 10 h, and was subsequently deposited onto titanium and alumina substrates using atmospheric plasma spraying technique. X-ray diffraction results indicate that the as-deposited coating consists of spinel and wustite phase. The hysteresis loop measurements show that the coating has a relatively low saturation magnetization and a coercivity of 1 270 Oe for in-plane direction. Magnetostriction of the as-deposited coating at ambient temperature is -73times10-6 with an applied magnetic field of 4 530 Oe
Keywords :
X-ray diffraction; cobalt compounds; coercive force; ferrites; heat treatment; magnetic hysteresis; magnetic sensors; magnetic thin film devices; magnetic thin films; magnetostriction; plasma arc sprayed coatings; plasma arc spraying; precipitation; 10 h; 1100 degC; CoFe2O3; X-ray diffraction; alumina substrates; atmospheric plasma sprayed cobalt ferrite coatings; chemical coprecipitation; coercivity; heat treatment; hysteresis loops; magnetorestrictive sensors; saturation magnetization; spinel phase; titanium substrates; wurtzite phase; Coatings; Cobalt; Ferrites; Magnetic field measurement; Magnetic sensors; Magnetostriction; Plasma applications; Plasma chemistry; Saturation magnetization; Thermal spraying; Cobalt ferrite; magnetostriction; plasma spray;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.893840
