Preparation and characterization of ZnSn-substituted barium ferrite thin films

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• 作者：Darja Lisjak^a ; ^{darja.lisjak@ijs.si} ; Kristina &#x17d ; u&#x17e ; ek Ro&#x17e ; man^b ; Federica Celegato^c ; Elena Olivetti^c ; Marco Coisson^c ; Massimo Pasquale^c ; Miha Drofenik^a ; ^d
• 关键词：Barium ferrite ; Thin film ; MFM ; Magnetic property ; Microwave property
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2011
• 出版时间：June 2011
• 年：2011
• 卷：323
• 期：11
• 页码：1465-1469
• 全文大小：656 K

文摘

The preparation of ZnSn-substituted barium ferrite films by sputtering deposition was studied. The as-sputtered films were amorphous, and annealing at a minimum of 750 °C was required to crystallize the films, based on the X-ray diffraction analysis and the magnetic measurements. Scanning electron microscopy combined with energy-dispersive X-ray spectroscopic microanalysis confirmed that the films were single phase with the composition BaZn_xSn_xFe_12−2xO₁₉, x=0.2−0.3, and their thicknesses were 0.4–1.0 μm when annealed at 750–900 °C. Atomic and magnetic force microscopy studies showed no significant grain growth upon annealing and that the films consisted of single-domain grains forming interaction-cluster-type domains. The natural ferromagnetic resonance frequency was determined at around 4 GHz, together with substantial magnetic losses that make these films promising candidates for microwave absorbers.