Table 1 Magnetic properties of the iron oxides used in our micromagnetic models at 20 °C

From: Coupling nanoscopic tomography and micromagnetic modelling to assess the stability of geomagnetic recorders

Mineral

Anisotropy

Aex

K1

Ms

Ref

Magnetite (Fe3O4)

Cubic

1.330 ⋅ 10−11Jm−1

− 1.304 ⋅ 104Jm−3

4.800 ⋅ 105Am−1

94

Maghemite (γFe2O3)

Cubic

1.000 ⋅ 10−11Jm−1

− 4.600 ⋅ 103Jm−3

3.800 ⋅ 105Am−1

15

  1. Aex is the exchange stiffness constant, K1 is the anisotropy constant, and Ms is the magnetisation saturation.
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