时间：2018年6月5日15:30-16:30
地点：学术报告厅
报告题目：Magnetic Hardening in Nanowires
报告人：J.P. Liu
（Department of Physics, University of Texas at Arlington, Texas, USA）
报告内容：It is of a grand challenge to develop strong magnetic anisotropy in nanostructured bulk permanent magnets. Recently, we have worked on bottom-up approaches to produce hard magnetic materials based on magnetic nanoparticles with high aspect ratio. The approaches start from synthesis of ferromagnetic nanowires and nanorods with modified solvothermal synthesis techniques. We have successfully synthesized monodisperse nanorods, nanowires and submicron chips of ferromagnetic FePt, FeCo, CoNi, CoCx and Co based materials. The aligned Co nanowires have their coercivity values exceeding 10 kOe and energy product exceeding 40 MGOe. The ferromagnetic nanoparticles are used as building blocks for advanced bulk and thin film permanent magnets, and can be also applied in biomedicine and ferrofluid technologies.