The influence of ion-beam bombardment on Structures and Magnetic Properties of Cu/Co-oxide Bilayers

• Main Authors: Li-Kai Wang, 王立楷
• Other Authors: Ko-Wei Lin
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/98871316356197579298

碩士 === 國立中興大學 === 材料科學與工程學系所 === 102 === In this study used ion beam assisted deposition (IBAD)for preparing Cu/Co-oxide bilayer films on SiO2 substrate .The structure and magnetic properties of two parts were characterized using X-ray diffraction (XRD), Transmission electron microscopy (TEM), Vibrating sample magnetometer (VSM), Electron spectroscopy for chemical analyzer (ESCA). Using ion beam assisted deposition (IBAD) deposited Cu/Co-oxide bilayer by ion-beam bombardment let Co or Co-oxide to embed in copper film , a cobalt-copper alloy formed in interface .By XRD and TEM results to know the structure is consisted of face-centered cubic (FCC) Cu (a～3.62 A)、rock-salt CoO (a～4.26 A)、face-centered cubic (FCC) Co (a～3.50 A)、belongs to spinel (spinel) structure Co3O4 (a～8.06 A) . The ESCA results to identified Cu-oxide on the interface of Cu and Co-oxide, Co-oxide layer is containing Co, CoO, Co3O4 . At low temperature a transition from paramagnetic to ferromagnetic or superparamagnetic behavior is observed.