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High-performance permanent magnets for energy-related applications require a high energy product (BH)max. It has been proposed that the two-phase materials exchange-coupled between magnetically hard and soft phases may greatly enhance the energy products.[1,2] More recently, self-assembly of two-component with hard magnetic phase FePt and soft magnetic phase Fe3Pt nanocomposites has successfully enhanced...
Recently, due to the short supply of rare earth element, there is a great demand in developing the rare-earth-free permanent magnets with giant magnetic anisotropy. Among the rare-earth-free permanent magnetic materials of current interest, MnxGa alloys are potential candidates as permanent magnets [1]. In the MnxGa alloys, the ferromagnetic L10-MnGa phase and ferrimagnetic D022-Mn-3Ga phase are theoretically...
A hysteresisgraph has been set up to investigate the sweep rate dependence of coercivity on NdFeB magnets in closed magnetic circuit. The linear relationship between coercivity and logarithmic sweep rate has been found and the maximum difference of HC in the sweep rate is 1.1%. The fluctuation field and activation volume have been deduced, which is in agreement with results in open magnetic circuit...
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