Abstract:


	Electron Spin Resonance (ESR), often called Electron Paramagnetic Resonance (EPR), 
 is concerned with the magnetically induced splitting of electron spin states.  The sample
 material is immersed in a strong static magnetic field, usually in the microwave frequency (GHz).
 Energy is absorbed by the sample when the frequency of radiation is appropriate to the energy
 difference between two states of the electrons in the sample.  Splitting can occur only
 when the electron is in a state with non-zero angular momentum, i.e. the spins of the
 electrons absorbing the radiation are only weakly interacting with each other.  Resonance can
 be observed during splitting, and then it's possible to measure Lande-g factors of
 materials, along with the magnetic field strengths.


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