The Magnetic Hamiltonian
Most of the magnetic properties that we shall consider arise from electrons. In this chapter we shall develop the Hamiltonian which pertains to the magnetic behavior of a system of electrons. It has been found experimentally that the electron possesses an intrinsic magnetic moment, or spin. The existence of such a moment follows directly from relativistic considerations. Therefore it is essential that we look for a relativistic description of the motion of an electron. The Dirac wave equation offers just such a description. We shall limit our discussion of the Dirac equation to the origin of the spin and the form of the spin-orbit interaction (for a more thorough treatment see [2.1]).
KeywordsWave Function Matrix Element Crystal Field Orbital Angular Momentum Orbital State
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