Cation engineering of Cu-ferrite films deposited by alternating target laser ablation deposition

Autor:	Aria Yang, C. Vittoria, Shaheen M. Islam, Zhaohui Chen, Vincent G. Harris
Rok vydání:	2008
Předmět:	Magnetization Materials science Laser ablation Extended X-ray absorption fine structure Analytical chemistry General Physics and Astronomy Ferrite (magnet) Thin film Epitaxy human activities Saturation (magnetic) Pulsed laser deposition
Zdroj:	Journal of Applied Physics. 103:07E509
ISSN:	1089-7550 0021-8979
Popis:	Epitaxial copper ferrite thin films were deposited on MgO substrates by the alternating target laser ablation deposition method. A series of films was studied to explore the impact of oxygen operating pressure, substrate temperature, and the ratio of laser shots incident on each target upon the magnetic, structural, and atomic structural properties. The highest saturation magnetization, 2800G, was achieved at a 90mTorr oxygen pressure and at 650°C for the substrate temperature. This value is 65% higher than the room temperature magnetization for bulk equilibrium samples. The inversion parameter was measured by extended x-ray absorption fine structure analysis. The sample having the highest saturation magnetization had a corresponding inversion parameter (percentage of Cu ion octahedral site occupancy) of 51.5% compared with the bulk value of 85%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f02d313494f9232e9e01a2d0db0f6bdc https://doi.org/10.1063/1.2837646 Zobrazit plný text záznamu