Events
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Start: 2008-10-06 16:00
End: 2008-10-06 18:00
The most intriguing open question in magnetic materials is the understanding of the mechanism for magnetism in the magnetic semiconductors. Although the evidence for magnetic semiconductors (not simply semiconductors which are ferromagnetic) is compelling, there is much uncertainty in the mechanism for the carrier polarization, suggesting that it must be quite novel. In this presentation, I will briefly describe the excitement that has been generated by magnetic semiconductors and describe the experimental evidence for their existence. | 7
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Start: 2008-10-08 16:01
End: 2008-10-08 18:00
The Cole-Cole model is known to accurately describe the dielectric response of a dispersive material over a wide range of frequencies. The model, however, does not lend itself easily to time domain simulation methods such as the Finite Difference Time Domain (FDTD) method, as it involves the approximation of fractional-order derivatives. Researchers have instead often used the Debye model, which is characterized by the same dielectric parameters as the Cole-Cole model, but has less accuracy in describing the dielectric response. | 9
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