Magnetic properties of the surface layer and its magnetic interaction with the interior of Nd-Fe-B sintered magnets
作者： Kurima Kobayashi , Michi-hide Nakamura , Kimiko Urushibata
DOI: 10.1063/1.4919812
关键词:
摘要: The magnetization and demagnetization mechanisms in the mechanically polished surface layers (SL) of c-plane a-b plane Nd-Fe-B sintered magnets were investigated. magnetic interaction between SL interior magnet was clarified by using vibrating sample magnetometer measurements a whole magneto-force microscopy observations domain structure layer. polishing eliminated Nd-rich grain boundary phases, which only about 2 nm thick, from crystal grains magnets. caused independent reversal SL, 5.5 μm as platy samples. coercivities (μ0Hc) less than 0.3 T. In contrast, did not produce although coercivity bulk samples clearly decreased formation SL. should form clusters that alter demagnetizing facto...
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