%0 Journal Article
%T MAGNETIC DOMAIN STRUCTURE AND RELATED MAGNETIC PROPERTIES OF(NdPr)_(16)Fe_(76)B_8 PERMANENT MAGNET
%A WANG Ruikun SUN Lihong LI Dongpei YING Qiming TTakeyama General Research Institute for Non-Ferrous Metals
%A Beijing
%A China [Originally published in ACTA METALL SIN
%A <br>WANG Ruikun SUN Lihong LI Dongpei YING Qiming T.Takeyama General Research Institute for Non-Ferrous Metals
%A Beijing
%A China [Originally published in ACTA METALL SIN
%J 金属学报(英文版)
%D 1989
%I 
%X The magnetic domain structure and related magnetic properties of (NdPr)_(16)Fe_(76)B_8 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/m~2,the exchange constant A=4.5×10~(-11)J/m,the domain wall width δ=15.7nm,and the critical grain diameter of single-domain D_c=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.
%K Nd-Fe-B permanent magnet
%K domain structure
%K magnetic properties<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=C19B08D052F5FD8445F4BB80A1A5D7BF&aid=44E714CC62716412DC7D2CBF4AD5EC6C&yid=1833A6AA51F779C1&vid=0B39A22176CE99FB&iid=5D311CA918CA9A03&sid=B344543C2864D684&eid=7C72DBC13F2D71EC&journal_id=1006-7191&journal_name=金属学报(英文版)&referenced_num=0&reference_num=11