Signal generation mechanisms in scanning-electron acoustic microscopy of ionic crystals

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MgO crystals have been studied by scanning‐electron acoustic microscopy under different experimental conditions. Contrast mechanisms in imaging are discussed and compared. The experimental results obtained by earthing or nonearthing the specimen‐transducer interface suggest the existence of a signal generation mechanism that is related to the ionic nature of these kind of crystals. Electron‐acoustic microscopy appears then to be a useful tool for the characterization of ionic materials.
© American Institute of Physics. This work has been supported by the Volkswagen Foundation and by the Comisión Interministerial de Ciencia y Tecnología (Project. No. PB86-0151). The help of Dr. J. Llopis in this work is acknowledged.
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1. E. Brandis and A. Rosencwaig, Appl. Phys. Leet, 37, 98 (1980). 2. G. S. Cargill, Nature 286, 691 (1980). 3. M. Urchulutegui, J. Piqueras, and J. Llopis, J. Appl. Phys.65, 2677 (1989). 4. L. J. Balk and Kultscher, Inst. Phys. Conf. ser. 67, 387 (1983). 5. J. Llopis, J. Piqueras, and L. Bru, J. Mater, Sci, 13, 1361 (1978). 6. N. Kultscher and L. J. Balk, Scanning Electron Microsc, 1, 33 (1986). 7. C. Kittel Quantum Theory of Solids (Wiley, New York, 1963). 8. L. J. Balk and N. kultscher, Inst. Phys. Conf. Ser, 87, 675 (1987). 9. B. Méndez and J. Piqueras, presented at the 6th conference on Microscopy of Semicoducting Materials, Oxford, April . 1989. 10. B. Donovan and J. F. Angress, Lattice vibrations (Chapman and Hall, London, 1971). 11. F. C. Brown in Poin Defects in Solids, edited by J. H. Crawford and L. M. Slifkin (Plenum, New York, 1972), Vol. I, p. 499.