Physics for Information Science: Unit III: Magnetic Properties of Materials
Classification of Magnetic Materials Based on Atomic Magnetic Moments
Magnetic materials are classified according to the presence or absence of the permanent magnetic dipoles.
CLASSIFICATION
OF MAGNETIC MATERIALS BASED ON ATOMIC MAGNETIC MOMENTS
Magnetic
materials are classified according to the presence or absence of the permanent
magnetic dipoles. Generally, every two electrons in an energy state of an atom
will form a pair with opposite spins. Thus the resultant spin magnetic moment
is zero. Hence they don't have permanent magnetic moments and they are called
as diamagnetic materials. Examples. gold, germanium, silicon, etc.
But
in some magnetic materials like iron, cobalt, etc., there exists unpaired
electrons. The spin magnetic moment of these unpaired electrons interact with
the adjacent atom's unpaired electron spin magnetic moment in a parallel manner
resulting in enormous permanent spin magnetic moment. These materials are classified
into paramagnetic, ferromagnetic and ferrimagnetic materials with respect to
the electron spins.
Physics for Information Science: Unit III: Magnetic Properties of Materials : Tag: : - Classification of Magnetic Materials Based on Atomic Magnetic Moments
Physics for Information Science: Unit III: Magnetic Properties of Materials
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