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Antiferromagnetism A form of ferromagnetism where the crystalline material contains two oppositely and equally magnetised sublattices so that the net magnetism will be zero.
If the two sublattices are not magnetised in exactly opposite directions, a weak magnetism can be created and is referred to as canted antiferromagntism.
The dipole component can be used to explain approximately 80% of the recorded magnetic field.
It is defined in each place at a certain instant of time by its direction (declination, inclination ) and intensity.
The field is largely generated in the outer fluid core of the Earth.
Alph-95: circle of confidence A measure of the uncertainty expressing the likely maximum difference in angle between the true magnetisation direction and that estimated from measurements.
An alpha-95 value greater than 5° is generally considered to represent a poor precision, while values less than 2.5° are considered to indicate a good precision.