Spontaneous magnetization depends on temperature as follows:
....(1)
Where Mo is the spontaneous magnetization at T = 0.
Equation (1) can also be written as:
....(2)
Curve (c) corresponds to J = 1/2 and represents
the spontaneous magnetization curve for Iron, Nickel and
Cobalt.
Curve (b) corresponds to J = 5/2
Curve (a) corresponds to J = .
There is a huge difference between curve (a) and curve (c).
Fe3O4 is Ferrimagnetic at room temperature.
3. Saturation Magnetization of Magnetite Fe O The temperature dependence of the spontaneous magnetization of magnetite (lodestone) Fe O, as measured by Pierre Weiss is given in the following tabl...
3. Saturation Magnetization of Magnetite Fe O The temperature dependence of the spontaneous magnetization of magnetite (lodestone) Fe O, as measured by Pierre Weiss is given in the following table: M/M, 0.92 0.88 0.83 0.77 068 058 043 0.32 0.22 0.03 T/Tc 0.23 0.33 0.43 0.54 066 0.78 0.89 0.94 0.95 0.98 0.8 0.6 olron i-…-쇼Niekel , l...- - xCobalt 0.2 0.4 0.6 0.2 0.8 Include the spontaneous magnetizations into the plot and compare with curve (a) which is the...