What is a demagnetization factor?

A demagnetization factor (N) describes how the shape of a magnetic body affects its internal magnetic field. It ranges from 0 to 1, with N_x + N_y + N_z = 1 for any geometry. Higher N values indicate stronger demagnetizing effects along that axis.

What geometries does Demagcal support?

Demagcal calculates demagnetization factors for six geometries: ellipsoids, rectangular prisms (using Aharoni's formula), cylinders (using Joseph's formula), spheres, thin films, and infinite rods.

What is Stoner-Wohlfarth analysis?

Stoner-Wohlfarth analysis is a model for single-domain magnetic particles that calculates the competition between magnetocrystalline anisotropy and shape anisotropy to determine magnetic behavior and switching fields.

Demagnetization Factor Calculator

Shape & Dimensions

Geometry type

Semi-axis a (x)

Semi-axis b (y)

Semi-axis c (z)

Length a (x)

Width b (y)

Height c (z)

Height h (z)

Diameter D = 2R (xy)

Diameter D = 2R

Infinite Thin Film (2D limit)

Thickness ≪ lateral dimensions

Infinite Rod (1D limit)

Length ≫ diameter

Material properties

Saturation magnetization ($M_s$)

First magnetocrystalline uniaxial anisotropy constant ($K_1$) [MJ/m³]

Uniaxial magnetocrystalline anisotropy easy axis is z-axis

Demagnetization Calculator

Shape & Dimensions

Material properties

Demagnetization factors

Formulas

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