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JinBae Kim,Sang-Geun Cho,Namseok Kang,Kwangyeol Choi,Jongryoul Kim IEEE 2012 IEEE transactions on magnetics Vol.48 No.11
<P>We present the results of the magnetic domain structures of BaAl<SUB>2</SUB>Fe<SUB>10</SUB>O<SUB>19</SUB> nanopowders prepared by a self-propagating combustion process. Amorphous precursors were calcined at 850 °C for 2 h with NaCl (Sample I) and without NaCl (Sample II). The transmission electron microscope and atomic force microscopy images evidently suggested that there was a topological difference between Sample I (plate- and rod-shaped nanopowders) and Sample II (rod-shaped nanoparticles). We observed a considerably enhanced coercivity in Sample II, compared to Sample I. This result can be understood by the change in the magnetic domain width due to the shape effect of the nanopowders, which was investigated by measuring the field-controlled magnetic force microscopy.</P>
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Current Status and Research Trend of Soft Magnetic Core
JinBae Kim 한국자기학회 2021 한국자기학회 학술연구발표회 논문개요집 Vol.31 No.2
High performance non-oriented electrical steels have become the subject of considerable attention because of the potential applications in electrical appliances and devices, such as transformers and motor cores, because of its excellent soft magnetic properties and low cost. Significant reductions of the magnetic core losses in electrical steel have been sought in order to improve efficiency in electrical appliances. It is well known that the magnetic properties of electrical steel are strongly dependent on the strip thickness, silicon concentration, grain size, and crystallographic texture. Among these factors, the increase in crystalline alignment is one of the most effective ways to reduce magnetic core loss. This article describes the research trend in high performance non-oriented electrical steels.
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