Información del autor
Autor Piqueras de Noriega, Javier |
Documentos disponibles escritos por este autor (322)
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Herrera, M. ; Cremades Rodríguez, Ana Isabel ; Stutzmann, M. ; Piqueras de Noriega, Javier | Academic Press Ltd- Elsevier Science Ltd | 2009-04Mn doped GaN films have been studied by conductive Atomic Force Microscopy (AFM), Cathodoluminescence (CL) and Electron Beam Induced Current (EBIC). AFM measurements revealed the presence of pinholes with diameters between 130 and 380 nm. The di[...]![]()
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Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier ; Tomashpolsky, Y. Y. ; Sadovskaya, N. V. ; Opagiste, C. | IOP publishing ltd | 1996-09Tl_2Ba-2CuO_(6+?) ceramics have been irradiated in a scanning electron microscope. The resultant changes in the cationic stoichiometry and oxygen content of the samples were investigated by cathodoluminescence (CL), secondary electron emission ([...]![]()
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Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier | American Institute of Physics | 1999-02-01In the present work, electron beam induced current (EBIC) has been applied to characterize several kinds of chemical vapor deposition diamond films. Regions of enhanced carrier recombination are detected in plan-view observations of thin films a[...]![]()
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Panin, G. N. ; Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier | IOP publishing ltd | 1998-06A combined scanning electron microscope-scanning tunnelling microscope (SEM-STM) system has been used to characterize CdxHg1-xTe and CdTe crystals, The electron beam induced current (EBIC) mode of the SEM shows the existence of inhomogeneities i[...]![]()
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Cremades Rodríguez, Ana Isabel ; Piqueras de Noriega, Javier ; Schreck, M. | Elsevier Science SA | 1997-01Electron beam-induced current (EBIC) is applied to the characterization of chemical vapor-deposited (CVD) diamond films. EBIC contrast shows a strong dependence on the orientation of grains relative to the incident electron beam. This is due to [...]![]()
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Electrically active defects in epitaxial, n-type, 4H-SiC have been investigated by electron-beam-induced current (EBIC) in the scanning electron microscope. Several defects, mainly nanopipes, 6H polytype inclusions and triangular, carrot-like, d[...]![]()
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Díaz-Guerra Viejo, Carlos ; Piqueras de Noriega, Javier ; Tomashpolsky, Y. Y. ; Sadovskaya, N. V. | Springer | 1997-04Bi_2Sr_2CaCu_2O_(8+x) superconducting ceramics have been irradiated in the scanning electron microscope (SEM), and the irradiation-induced effects investigated by cathodoluminescence (CL), secondary electron emission (SEE) and X-ray microanalysi[...]![]()
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Sochinskii, N. V. ; Dieguez, E. ; Pal, U. ; Piqueras de Noriega, Javier ; Fernández Sánchez, Paloma ; Agullorueda, F. | IOP publishing ltd | 1995-06Undoped and doped CdTe wafers have been thermally annealed in Ga melt, or in Cd vapour or in a vacuum to eliminate Te precipitates from the volume of the wafers. The effect of annealing conditions on the transformation of Te precipitates has bee[...]![]()
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Bazta, Otman ; Urbieta Quiroga, Ana Irene ; Piqueras de Noriega, Javier ; Fernández Sánchez, Paloma ; Addou, M. ; Calvino, J.J. ; Hungría, A.B. | Elsevier Science SA | 2019-11-05Pure ZnO and ZnO: 2%Y:x%Li (x = 0, 3, 5 and 7 at.%) thin films have been successfully prepared onto glass substrates under optimized conditions by spray pyrolysis technique at 450 ºC and their suitability for the fabrication of efficient optoele[...]![]()
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Plaza, J. L. ; Hidalgo Alcalde, Pedro ; Piqueras de Noriega, Javier ; Dieguez, E. | Sociedad Española de Cerámica y Vidrio | 2000-07En este trabajo se ha realizado el estudio de cristales de GaSb crecidos por el método Bridgman y dopados con Er y Nd con distintas concentraciones. Se han realizado análisis de absorción atómica pudiéndose obtener el coeficiente de segregación [...]![]()
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Nogales Díaz, Emilio ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier ; Garcia, J. A. | IOP publishing ltd | 2009-03-18Cathodoluminescence and photoluminescence techniques have been used to investigate room temperature light emission from ß-Ga_2O_3:Eu nanostructures, which were obtained by two methods. In one of them, a mixture of Ga_2O_3/Eu2O3 powders was used [...]![]()
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Piqueras de Noriega, Javier ; Díaz-Guerra Viejo, Carlos ; Vila Santos, María | American Institute of Physics | 2010-05-10Exchange anisotropy has been observed and investigated in single-crystalline CuO nanowires grown by thermal oxidation of Cu. The exchange bias field decreases by increasing temperature and can be tuned by the strength of the cooling field. A tra[...]![]()
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Miroiu, F. ; Fernández Sánchez, Paloma ; Piqueras de Noriega, Javier | Wiley-V C H Verlag Gmbh | 2006Fabrication of low dimensional structures of II-VI compounds as nanoparticles and elongated structures, such as nanowires or nanotubes, is a subject of increased interest due to their potential use in different technological applications. The ai[...]![]()
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Piqueras de Noriega, Javier ; Alemán Llorente, Belén ; Ortega Villafuerte, Yanicet ; García Martínez, José Ángel | American Institute of Physics | 2011-07-01Fe dopedZnO nanowires,nanorods, and urchin-like nanostructures have been grown using an evaporation-deposition method with compacted mixtures of ZnS and Fe_2O_3 powders, with different Fe contents as precursors. Treatments at 950 °C under argon [...]![]()
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López, Iñaki ; Nogales Díaz, Emilio ; Hidalgo Alcalde, Pedro ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier | Wiley-V C H Verlag Gmbh | 2012-01The field emission properties of gallium oxide nanowires grown by thermal evaporation-deposition have been investigated inside the chamber of a scanning electron microscope. Turn on electric fields and enhancement factors have been determined fo[...]