Formulae and units used to describe the magnetic properties of materials

4 Formulae and units used to describe the magnetic properties of materials 

A spinning electron has a magnetic dipole moment, the value of which is 9.2741 x 10 A m (also quoted as 9.2741 x 10 JT ). This can be considered as the atomic unit of magnetism. It is called the Bohr magneton, given by  

Two other important magnetic quantities, the magnetic induction, a vector quantity, B, and the magnetic field strength, a vector, H, are defined by reference to a solenoid, which is a cylindrical coil carrying an electric current. In a vacuum, the magnetic induction and magnetic field within the 

In the case when the solenoid is filled with a material, the magnetic induction and the magnetic field are given by  

The contribution of the material to the magnetic induction can also be defined by the following equation  

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FORMULAE AND UNITS USED TO DESCRIBE THE MAGNETIC PROPERTIES OF MATERIALS 551... 

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