The magnetic domain structure and related magnetic properties of (NdPr)16Fe76B8 permanentmagnet have been studied by colloid-SEM method.In thermally demagnetized state,the ma-trix grains in the magnet generally exhibit multidomain structure,i.e.,180° plate-like indi-vidual domain and a few spike-like or maze-like domains.The average width of the domainmeasured was 1.5μm.Grain size of single-domain was observed to be generally about 1μmand only a few up to 3μm.The results calculated are:the domain wall energy γ=36MJ/m2,the exchange constant A=4.5×10-11J/m,the domain wall width δ=15.7nm,and the critical grain diameter of single-domain Dc=0.5μm.The dependence of high magnet-ic field gradient at grain boundaries in different magnetization directions in the adjacent mag-netic domains located on both sides of grain boundaries and the effect of microstructure on thevalues of K,A and δ were discussed.
展开▼
机译:平成28年度论文赏受赏轮文:Effect of Si/Fe Composition, Substrate Temperature, and Substrate Orientation on the Structure and Magnetic Properties of Fe-Si Alloy Film
机译:synthesis, Crystal structures, and Luminescence and magnetic properties of 3D Chiral and achiral Lanthanide Diphosphonates Containing Left- and Right-Handed Helical Chains