A sample of a soft magnetic alloy is shaped into a prolate spheroid of aspect ratio
PHYSICS · Multi-part · Fermi University Physics · Electricity, Magnetism & Electromagnetism · Magnetic materials · Magnetic materials
The Boundary-Value Problem, Ch Magnetisation, bound currents and H, completed
Problem
A sample of a soft magnetic alloy is shaped into a prolate spheroid of aspect ratio 10, with demagnetising factor Na=0.0203 along its long axis. A magnetometer measures χapp=40.0 with the field applied along that axis.
((a)) Find the true susceptibility χm of the alloy.
((b)) Say whether the demagnetising correction was important here.