Measurements Techniques for Identification of Ferromagnetism

At the r point in wurtzite semiconductors, using band-to-band calculations, the transition strengths (or oscillator strengths) for the B (as) and C (ac) bands relative to that for the A band a ) can be obtained for light propagation perpendicular to the 

Using the values reported for ZnO and mentioned above after Equation 5.37 (Ai 43 meVand A2 5.3 meV), for x = 0.01 with (Sz) =0.5 and NoP = 1 eV, the Zeeman splits in ZnO has been estimated to be 5 meV for the A valence band and 4.6 meV with opposite polarity for the B valence band. The overall magneto-optical response, therefore, may be reduced or even cancelled, as both splitting energies are similar in magnitude but opposite in polarity. 

In the absence of an external magnetic field, the transmitted light intensity through a sample is given by 

Using Equation 5.41, Gmcd defined in Equation 5.34 can be rewritten as 

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