Title :
Magnetic aftereffect in SmCo5 sintered magnets machined to small size
Author_Institution :
Toei Ind. Co. Ltd., Tokyo, Japan
fDate :
11/1/1989 12:00:00 AM
Abstract :
The magnetic aftereffect was measured for SmCo5 sintered magnets. The effects of machining down to small size and to heat treatment were investigated. Marked magnetic aftereffect and permanent deterioration were observed. It was found that the magnetic aftereffect could be reduced by heat treatment to about 1/2 and the permanent deterioration to about 1/3. In contrast, the aftereffect constant, which is the coefficient of logarithmic time decay, remained constant irrespective of heat treatment
Keywords :
annealing; cobalt alloys; ferromagnetic properties of substances; magnetic aftereffect; magnetisation; permanent magnets; samarium alloys; sintering; SmCo5 sintered magnets; aftereffect constant; annealing; heat treatment; logarithmic time decay coefficient; machining effect; magnetic aftereffect; magnetisation; Demagnetization; Electromagnetic measurements; Heat treatment; Machining; Magnetic field measurement; Magnetic flux; Magnetic properties; Magnetic separation; Magnetization; Superconducting magnets;
Journal_Title :
Magnetics, IEEE Transactions on
