纳米晶铁基薄带磁阻抗的温度依赖性

Temperature dependences of magnetoimpedance of nanocrystalline Fe-based ribbons.

作者信息

Semirov A V, Bukreev D A, Moiseev A A, Volchkov S O, Kurlyandskaya G V, Lukshina V A, Volkova E G

机构信息

Department of Physics, East Siberian State Pedagogical University, Nizhnyaya Naberezhnaya ul. 6, Irkutsk 664011, Russia.

出版信息

J Nanosci Nanotechnol. 2012 Sep;12(9):7446-50. doi: 10.1166/jnn.2012.6546.

DOI:10.1166/jnn.2012.6546

PMID:23035492

Abstract

The influence of a magnetic field or the mechanical stresses on the impedance of the Fe73.5Si16.5B6Nb3Cu1 and Fe73.5Si13.5B9Nb3Cu1 ribbons was investigated in the (297 divided by 433) K temperature range. It is shown that impedance changes, which are observed under the application of mechanical stresses and temperature, are conditioned by the structural features and magnetic properties of the alloys. The temperature increase leads to a decrease of the saturation magnetostriction constant, an increase of the anisotropy axis dispersion and a decrease of the anisotropy effective value. It was determined that the maximum sensitivity of impedance to the mechanical stresses reaches the value of about 2%/MPa for the Fe73.5Si16.5B6Nb3Cu1 and Fe73.5Si13.5B9Nb3Cu1 samples.

摘要

在297至433K的温度范围内，研究了磁场或机械应力对Fe73.5Si16.5B6Nb3Cu1和Fe73.5Si13.5B9Nb3Cu1薄带阻抗的影响。结果表明，在施加机械应力和温度时观察到的阻抗变化，是由合金的结构特征和磁性决定的。温度升高会导致饱和磁致伸缩常数减小、各向异性轴色散增加以及各向异性有效值减小。已确定，对于Fe73.5Si16.5B6Nb3Cu1和Fe73.5Si13.5B9Nb3Cu1样品，阻抗对机械应力的最大灵敏度达到约2%/MPa。