This document discusses three types of magnetism: diamagnetism, paramagnetism, and ferromagnetism. Diamagnetic materials are weakly repelled by magnetic fields. Paramagnetic materials are weakly attracted to magnetic fields, with induced magnetic fields forming internally in the same direction as an applied external field. Ferromagnetic materials have domains where the magnetic fields of individual atoms are aligned parallel through internal fields or exchange interactions.

1. P.RAMYA M Sc M Phil.,
ASSISTANT PROFESSOR
BON SECOURS COLLEGE FOR WOMEN
THANJAVUR

2. DIA, PARA, FERRO MAGNETISM

3. DIA MAGNETISM
• Diamagnetic materials are repelled by a magnetic field
• an applied magnetic field creates an ... For example,
the magnetic susceptibility of diamagnets such as water is χv
= −9.05×10−6.
• The most strongly ... The Langevin theory is not the
full picture for metals because there are also non-localized
electrons

4. PARA MAGNETISM
• Para magnetism refers to a property of certain materials that
are weakly attracted to magnetic fields.
• When exposed to an external magnetic field,
• internal induced magnetic fields form in these materials that
are ordered in the same direction as the applied field

5. FERRO MAGNETISM
• A ferromagnet is a material for which an internal field or an
equivalent exchange interaction acts to align atomic dipole
moments parallel to one another
• A third type of magnetic material is a ferromagnet. In this
material, there are domains in which the magnetic fields of
the individual atoms align