Studies of nanoconstrictions, nanowires and Fe304thin films: electrical conduction and magnetic properties : fabrication by focused electron/ion beam

"This work constitutes a detailed study of electrical and magnetic propertiesin nanometric materials with a range of scales: atomic-sized nanoconstrictions, micro- and nanowires and thin films. Firstly, a novel method of fabricatingatomic-sized constrictions in metals is presented; it relies on measuring theconduction of the device while a focused-ion-beam etching process is in progress. Secondly, it describes wires created by a very promising nanolithography technique: Focused electron/ion-beam-induced deposition. Three different gas precursors were used: (CH3)3Pt(CpCH3), W(CO)6 and Co2(CO)8. The thesis reports the results obtained for various physical phenomena: the metal-insulator transition, superconducting and magnetic properties, respectively. Finally, the detailed magnetotransport properties in epitaxial Fe3O4 thin films grown on MgO (001) are presented. Overall, the new approaches developed in this thesis have great potential for supporting novel technologies." Describes promising new approach to tailoring magnetic and other properties of nanostructures Potentially useful in diverse applications of nanotechnology Nominated as an outstandingcontribution by the University of Zaragoza INDICE: Introduction.- Experimental Techniques.- Magnetotransport Properties of Epitaxial Fe3O4 thin Films.- Conduction in in Atomic-Sized Magnetic Metallic Constructions created by FIB.- Pt-C Nanowires created by FIBID and FEBID.- Superconductor W-Based Nanowires created by FIBID.- Magnetic Cobalt Nanowires created by FEBID.- Conclusions and Outlook.- CV.

• ISBN: 978-3-642-15800-1
• Editorial: Springer
• Encuadernacion: Cartoné
• Páginas: 200
• Fecha Publicación: 01/11/2010
• Nº Volúmenes: 1
• Idioma: Inglés