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題名: The Irreversible Magnetization Process in Microstructured Permalloy Ellipses
作者: Chang, Y. C.;Chang, C. C.;Wu, Jong-Ching
貢獻者: 物理學系
關鍵詞: Magnetic force microscopy (MFM);Magnetization switching;Magnetoresistance;Permalloy
日期: 2005-10
上傳時間: 2014-06-06T07:18:28Z
出版者: IEEE
摘要: Microstructured permalloy ellipses have been fabricated using electron-beam lithography through a lift-off process. The investigations were focused on the magnetization configurations and switching processes adopting magnetic force microscopy (MFM) and magnetoresistance (MR) measurements. An original five-vortex domain configuration of ellipse can be controlled and manipulated to become a four-vortex domain configuration by tuning the external magnetic field applied along the short-axis direction. In addition, an asymmetrical reversal process can be demonstrated on an ellipse having two- or three-vortex domain configuration, in which the switching fields are 36 Oe and 24 Oe, respectively.
關聯: IEEE Transactions on Magnetics, 41(10): 3742-3744
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