Abstract
| Original language | English |
|---|---|
| Journal | Journal of Magnetism and Magnetic Materials |
| Volume | 476 |
| Pages (from-to) | 417-422 |
| ISSN | 0304-8853 |
| DOIs | |
| Publication status | Published - 2019 |
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The demagnetization factor for randomly packed spheroidal particles. / Bjørk, R.; Zhou, Z.
In: Journal of Magnetism and Magnetic Materials, Vol. 476, 2019, p. 417-422.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - The demagnetization factor for randomly packed spheroidal particles
AU - Bjørk, R.
AU - Zhou, Z.
PY - 2019
Y1 - 2019
N2 - We investigate if the demagnetization factor for a randomly packed powder of magnetic spheroidal particles depend on the shape of the spheroidal particles and what the internal variation in magnetization is within such a powder. A spheroid is an ellipsoid of revolution, i.e. an ellipsoid with two semi-major axis being equal. The demagnetization factor is calculated as function of particle aspect ratio using two independent numerical models for several different packings, and assuming a relative permeability of 2. The calculated demagnetization factor is shown to depend on particle aspect ratio, not because of direct magnetic interaction but because the particle packing depend on the aspect ratio of the particles. The relative standard deviation of the magnetization across the powder was 3–8%, increasing as the particle shape deviates from spherical, while the relative standard deviation within each particle was relatively constant around 5%.
AB - We investigate if the demagnetization factor for a randomly packed powder of magnetic spheroidal particles depend on the shape of the spheroidal particles and what the internal variation in magnetization is within such a powder. A spheroid is an ellipsoid of revolution, i.e. an ellipsoid with two semi-major axis being equal. The demagnetization factor is calculated as function of particle aspect ratio using two independent numerical models for several different packings, and assuming a relative permeability of 2. The calculated demagnetization factor is shown to depend on particle aspect ratio, not because of direct magnetic interaction but because the particle packing depend on the aspect ratio of the particles. The relative standard deviation of the magnetization across the powder was 3–8%, increasing as the particle shape deviates from spherical, while the relative standard deviation within each particle was relatively constant around 5%.
U2 - 10.1016/j.jmmm.2019.01.005
DO - 10.1016/j.jmmm.2019.01.005
M3 - Journal article
VL - 476
SP - 417
EP - 422
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
ER -