Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8154138 | Journal of Magnetism and Magnetic Materials | 2018 | 17 Pages |
Abstract
A technique is proposed for demagnetizing correction of the measured magnetization curve and hysteresis loop, i.e., the Mâ(Ha) curve, of a ferromagnetic cylinder into the true M(H) curve of the material, where Ha is the uniform applied field provided by a long solenoid and Mâ is the magnetization measured by a fluxmeter with the measuring coil surrounding the cylinder midplane. Different from ordinary demagnetizing correction by using a fixed demagnetizing factor, an (Ha,Mâ)-dependent fluxmetric demagnetizing factor Nf(γ,Ïd) is used in this technique, where γ is the ratio of cylinder length to diameter, Ïd is the differential susceptibility on the corrected M(H) curve, and Nf(γ,Ïd) is approximated by accurately calculated Nf(γ,Ï) of paramagnetic cylinders of the same γ and Ï=Ïd. The validity of the technique is studied by comparing results for several samples of different lengths cut from the same cylinder. Such a demagnetizing correction is unambiguous but its success requires very high accuracy in the Nf determination and Mâ(Ha) measurements.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Du-Xing Chen, Enric Pardo, Yong-Hong Zhu, Li-Xiong Xiang, Jia-Quan Ding,