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Title: Synthesis & magnetic properties of large-area ferromagnetic nanostructure arrays.
Keywords: magnetism, nanoring, nanoshell, nanocup, interference lithography, OOMMF
Issue Date: 23-Jan-2014
Source: WANG ZONGBIN (2014-01-23). Synthesis & magnetic properties of large-area ferromagnetic nanostructure arrays.. ScholarBank@NUS Repository.
Abstract: Synthesis and magnetic properties of ordered array of various ferromagnetic nanostructures. A large-area high-throughput synthesis technique was developed using maskless interference lithography as the patterning method. The technique proved to be highly versatile on the final geometries achievable. The structures demonstrated include ferromagnetic nanodisk, nanoparticle, cylindrical nanoshell, perforated nanocup, imperforated nanocup and concentrically layered NiFe/Au/NiFe nanoshell. The dimension of these structure was well controlled with sub-10 nm shell width demonstrated. Magnetic properties of these novel ferromagnetic nanostructures were investigated experimentally with Vibrating Sample Magnetometry and Maneto-optical Kerr Effect measurements. Numerical micromagnetic simulations with the Object Oriented MicroMagnetic Framework (OOMMF) codes were performed to correlated with and explain the measured results. The special geometries and dimensions of these nanostructures give them interesting magnetization states and reversal processes.
Appears in Collections:Ph.D Theses (Open)

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