Skip to main content
Earth, Planets and Space

Table 1 Hysteresis parameters obtained from room-temperature measurements

From: Constraining the magnetic properties of ultrafine- and fine-grained biogenic magnetite

Samples

Weight (mg)

Magnetite in M-HFn (mg)

Magnetite in MSR-1 (mg)

Ms (Am2kg−1)

Mrs (Am2kg−1)

Hc (mT)

Hcr (mT)

M1

3.1

1.00

0

9.6

0

0

0

M2

15.5

1.98

0.38

4.1

0.07

1.8

15.7

M3

22.5

1.02

0.77

1.6

0.09

4.5

15.2

M4

12.8

0

0.51

0.3

0.11

9.6

15.2

  1. Ms, saturation magnetization; Mrs, saturation remanence; Hc, coercivity force; Hcr, remanence coercivity
  2. Calculation of magnetite mass in magnetoferritin (M-HFn)
  3. Wmagnetite = Cmagnetite × (4/3 × π × (d/2)3)
  4. Wferritin = Mferritin/NA
  5. where density of magnetite, Cmagnetite = 5.18 g/cm3; diameter of the magnetite core in magnetoferritin, d = 5.31 nm; molecular weight of ferritin, Mferritin = 509 kDa; Avogadro’s constant, NA = 6.02 × 1023
Back to article page