Room temperature magnetism of oxidized titanium nitride thin films
| Autor: | 宋昆燁 |
|---|---|
| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 In this thesis, we have prepared oxidized titanium nitride thin films which were grown on STO(100) substrates by pulsed laser deposition (PLD). The surface morphology of samples with various oxygen pressure was studied by means of atomic force microscopy(AFM). The crystal structures and electronic states were investigated by means of x-ray diffraction(XRD) and x-ray absorption spectroscopy(XAS). The ferromagnetic measurements by means of superconducting quantum interference device(SQUID). The results of SQUID measurements showed room temperature ferromagnetism obviously when oxygen pressure greater than 1x10-4 torr and then disappeared gradually. The results of XRD, XAS and SQUID measurements indicated that the room temperature ferromagnetism changed with structures. The structures change and disorder led oxygen vacancies. Finally, the BMPs overlapped would produce ferromagnetism . |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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