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The design and calibration of a Near-Field Scanning Microwave Microscope (NSMM) for measurement of permittivity and loss on the small scale are described. The instrument described uses a wire probe that is electromagnetically coupled to a resonant cavity. Using an electrostatic model based on image charges (Gao and Xiang 1998) permittivity and loss may be determined. The paper describes progress in...
AbstractThe time and temperature evolution of twinning in cordierite is simulated using three computer models. The orientation of walls between twin domains in natural cordierite follows mainly the ferroelastic pattern which minimises the strain energy of the walls between twin-related domains. Such ferroelastic twinning is simulated in an elastic three-states Potts model in which each structural...
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