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Garcia, J. A. ; Remon, A. ; Urchulutegui, M. ; Piqueras de Noriega, Javier ; Jiménez, J. ; Torres, A. | Wiley-V C H Verlag Gmbh | 1997-02-16Infrared luminescence of Bi2Sr2CaCu2Ox ceramics, in the range 800 to 1800 nm (0.7 to 1.5 eV) has been investigated by photoluminescence and cathodoluminescence in the scanning electron microscope (SEM). Untreated samples do not show infrared lum[...]texto impreso
Urchulutegui, M. ; Gómez, P. ; Piqueras de Noriega, Javier ; Dworschak, F. | Elsevier Science SA | 1994-05The effect of irradiation with 2.5 MeV electrons on InP single crystals is investigated by cathodoluminescence (CL) in the scanning electron microscope. Irradiation causes changes in the CL spectra but no luminescence band can be associated with[...]texto impreso
Urchulutegui, M. ; Piqueras de Noriega, Javier ; LLopis, J. | American Institute of Physics | 1989-04-01The capability of scanning electron?acoustic microscopy in the characterization of MgO crystals has been studied. The conditions for the observation of different surface and subsurface features in as?grown and deformed crystals are described and[...]texto impreso
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[...]texto impreso
Scanning electron acoustic microscopy (SEAM) has been used in the observation of domain walls in iron- and cobalt-based amorphous alloys ribbons. Controlled magnetic annealing experiments enabled the direct identification of domain walls in SEAM[...]texto impreso
The variation of the electron acoustic signal as a function of temperature in ceramic materials has been studied. Scanning electron acoustic microscopy (SEAM) contrast in MgO single crystals and in reaction bonded SiC, between 100 and 273 K, is [...]
