Studies of Nanoconstrictions, Nanowires and Fe3O4 Thin Films
Electrical Conduction and Magnetic Properties. Fabrication by Focused Electron/Ion Beam
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Beschreibung
This work constitutes a detailed study of electrical and magnetic properties in nanometric materials with a range of scales: atomic-sized nanoconstrictions, micro- and nanowires and thin films. Firstly, a novel method of fabricating atomic-sized constrictions in metals is presented; it relies on measuring the conduction 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.
This work constitutes a detailed study of electrical and magnetic properties in nanometric materials with a range of scales: atomic-sized nanoconstrictions, micro- and nanowires and thin films. Firstly, a novel method of fabricating atomic-sized constrictions in metals is presented; it relies on measuring the conduction of the device while a focused-ion-beam etching process is in progress.
Describes promising new approach to tailoring magnetic and other properties of nanostructures Potentially useful in diverse applications of nanotechnology Nominated as an outstanding contribution by the University of Zaragoza Includes supplementary material: sn.pub/extras
Autor*in
Amalio Fernandez-Pacheco
Themen in »Studies of Nanoconstrictions, Nanowires and Fe3O4 Thin Films«
Electrical transport nanostructures FEBID FIBID Focused electron ion beam Nanofabrication Nanomagnetism Spintronics Superconducting nanowires