【摘要】 在f=10-3×103Hz和Bm=0.1-1.0T范围内,研究了高Br纳米晶Fe73Cu1Nb2V1.5Si13.5B9合金的每周总损耗和频率的关系。P/f对f的行为明显地呈现非线性。大约在200Hz以下的范围内,非线性特征特别明显。用损耗统计理论中的“磁体”的行为能相当好地描述这种非线性行为。在较低的频段内,活动的磁体数n和动态过剩场Hexc是线性相关的,而在较宽和较高频段内,n与Hexc的关系是非线性的。更多还原

【Abstract】 In the ranges of f=10-3×10 3 Hz and B m =0.1-1.0T,the dependence of total c ore loss per cycle P /f on frequency f was investigated for nanocrystalline Fe 73 Cu 1 Nb 2 V 1.5 Si 13.5 B 9 alloy with high B r .The behavior of P /f vs f exhibits clearly non -linearity.The non -linearity is obvious in the range below about 200Hz.The non -linear behavior can considerably we ll be described in terms of the behavior of the simultaneously active"Magnetic Object"(MO)in the statistical theory of power loss.In the lower frequency segment ,the number n of the active MOs is near -linearly associated with the dynamic excess field H exc ,whereas the dependence of n on H exc clearly exhibits non -linearity in the wider and higher fre quency segment.更多还原