Curie And Curie 's Law

1543 Words7 Pages
ABSTRACT. Curie’s law, first proposed by a French physicist, Pierre Curie, states that the magnetization of paramagnetic materials varies directly with the applied magnetic field and inversely with the absolute temperature of the substance. This paper presents prerequisite definitions and a detailed explanation of Curie’s law along with a brief historical account.
KEYWORDS. Curie’s law, Pierre Curie, Magnetic susceptibility.

Curie’s law is an empirical law of physics (that is, derived by curve fitting on the basis of experiments) discovered by a French physicist, Pierre Curie. The law states that the magnetization of the paramagnetic substance is directly proportional to the magnetic field and inversely proportional to the
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In 1898, they discovered of radium and polonium and described the properties of radium and its products. It is noteworthy that the couple achieved these breakthroughs despite not having access to adequate laboratory facilities and having a stressful teaching schedule. Their work formed the basis for much of the following research in nuclear physics and chemistry. For their study into the spontaneous radioactive decay, they received a half share of the Nobel Prize for Physics in 1903.
Pierre died in Paris on April 19, 1906.

History of Curie’s law:
Curie’s law was first published in Annales de Chimie et de Physique in 1895 by Pierre Curie. It is found to be followed by certain gases (like O_2 and NO), dilute solutions of paramagnetic salts of rare-earth and some other crystalline salts and alkali metal vapors. In general, it is applicable for paramagnetic materials with weak externally applied magnetic fields or high temperatures as the magnetization saturates in the case of strong magnetic fields or low temperatures.
Statistical analysis can be used to derive Curie’s law as resulting from the properties of a system of feebly interacting particles possessing magnetic dipole moments. When there is no externally applied magnetic field, these magnetic moments of the particles point in random directions. However, when the field is switched on, the magnetic moments of the particles are aligned in the direction of the externally applied field resisting the thermal motion which
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