Paramagnetism Theory

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Diamagnetism was discovered in September 1845 by Michael Faraday. Diamagnetism has weak magnetism which shows its property in the presence of external magnetic field. When external magnetic field provided to a material it changes the orbital motion of electron. Its induced magnetic moment is very small and in the opposite direction of the applied field. Diamagnetic materials are attracted towards the region where the magnetic field is weak if we placed it in strong electromagnet. This phenomenon can be found all materials because it is so weak it is also found in elements which have usually paired electrons except for Oxygen. In the case of magnetism we observe the magnetization become opposite in direction on providing applied field make…show more content…
Such paramagnetic behaviour can also be observed in ferromagnetic materials that are above their Curie temperature. Paramagnetic materials attract and repel like normal magnets when subject to a magnetic field. Under relatively low magnetic field saturation when the majority of the atomic dipoles are not aligned with the field, paramagnetic materials exhibit magnetization according to Curie's Law: M = C•B/T, where M is the resulting magnetization (magnetic dipole moment/unit volume), measured in Amps/meter. B is the magnetic flux density of the applied field, measured in Tesla. T is absolute temperature, measured in Kelvins. C is a material-specific Curie constant This law indicates that paramagnetic materials tend to become increasingly magnetic as the applied magnetic field is increased, but less magnetic as temperature is increased. Curie's law is incomplete because it fails to predict what will happen when most of the little magnets are aligned (after everything is aligned, increasing the external field will not increase the total magnetization) so Curie's Constant really should be expressed as a function of how much of the material is already…show more content…
Preforming dielectric properties means they do not readily conduct electricity although EM waves can penetrates through it. This property makes it special because other material which has magnetic properties conducts electricity like Fe, Ni etc. Porosity which is bonus for the Ferrites in the increasing trends of technology because other metals don’t have this ability. Ferrites have a bright future it will help humanity in many ways. Ferrites have three basic types named Spinel, Garnet, and Hexagonal on the bases of structure. As spinel ferrites has formula MFe2O4 and used in medical, water purification, high frequency antennas and many other applications Garnet has formula R3Fe5O12 (R= Yttrium or rare earth ions like Dy, Gd, La) and have application in microwaves system and Hexagonal has formula MFe12O19 (M= Ba, Sr, Ca etc.) and have their importance in permanent magnetic
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