Sputter-deposited Au/NisoFeso bilayer films were annealed in a vacuum of 5×10^-4 Pa at 523 to 723 K for 30 or 90 min. The characteristics of the bilayer films were determined by Auger electron spectroscopy, field...Sputter-deposited Au/NisoFeso bilayer films were annealed in a vacuum of 5×10^-4 Pa at 523 to 723 K for 30 or 90 min. The characteristics of the bilayer films were determined by Auger electron spectroscopy, field emission scanning electron microscopy, X- ray diffractometry, a four-point probe technique, and an alternating gradient magnetometer. When the annealing temperature and time reached 723 K and 90 min, Ni and Fe atoms markedly diffused into the Au layer. The grain size of the Au layer did not change markedly with the annealing condition. As the annealing time was 30 min and the annealing temperature exceeded 573 K, the resistance of the bilayer film increased with increasing the annealing temperature. Furthermore, the resistance of the bilayer film annealed at 723 K for 90 ,nin was lower than that of the bilayer film annealed at 723 K for 30 min. All the bilayer films showed magnetic hysteresis loops. The as-deposited bilayer film showed a hard magnetization. The bilayer film represented an easy magnetization with increasing the annealing temperature. The Au/Ni50Fe50 film that annealed at 723 K for 90 min had the lowest saturation magnetization.展开更多
Bilayer composite materials of Cu-coated Fe and CuSn10 containing 0%,5%,10%,15%,20%,25%,30%,35%,40%,45%,50%Cu-coated Fe were prepared in mesh belt sintering furnace.Microscopic pore morphology of materials was observe...Bilayer composite materials of Cu-coated Fe and CuSn10 containing 0%,5%,10%,15%,20%,25%,30%,35%,40%,45%,50%Cu-coated Fe were prepared in mesh belt sintering furnace.Microscopic pore morphology of materials was observed,bending strength was tested.Results show that,There is a good bonding between Cu-coated Fe and CuSn10,with the increase of Cu-coated Fe content from 0%to 50%,bending strength of bilayer composite materials increases.展开更多
制备了在500℃下矫顽力为603.99 k A/m,最大磁能积为87.30 k J/m3的高温磁体。研究发现,在室温下,Fe含量较高的SmCo基磁体矫顽力较大,而高温下Fe含量高的磁体矫顽力较小。对磁体的微观形貌、相组成及磁体胞壁胞内成分进行分析,结果表明,...制备了在500℃下矫顽力为603.99 k A/m,最大磁能积为87.30 k J/m3的高温磁体。研究发现,在室温下,Fe含量较高的SmCo基磁体矫顽力较大,而高温下Fe含量高的磁体矫顽力较小。对磁体的微观形貌、相组成及磁体胞壁胞内成分进行分析,结果表明,随Fe含量升高,胞尺寸变大,1:5H相含量减少,胞壁相中Cu含量及胞内相中Fe含量升高。Fe和Cu元素在胞壁和胞内两相中含量的改变,导致了室温及高温两相畴壁能差的改变,从而引起了矫顽力的变化。展开更多
文摘Sputter-deposited Au/NisoFeso bilayer films were annealed in a vacuum of 5×10^-4 Pa at 523 to 723 K for 30 or 90 min. The characteristics of the bilayer films were determined by Auger electron spectroscopy, field emission scanning electron microscopy, X- ray diffractometry, a four-point probe technique, and an alternating gradient magnetometer. When the annealing temperature and time reached 723 K and 90 min, Ni and Fe atoms markedly diffused into the Au layer. The grain size of the Au layer did not change markedly with the annealing condition. As the annealing time was 30 min and the annealing temperature exceeded 573 K, the resistance of the bilayer film increased with increasing the annealing temperature. Furthermore, the resistance of the bilayer film annealed at 723 K for 90 ,nin was lower than that of the bilayer film annealed at 723 K for 30 min. All the bilayer films showed magnetic hysteresis loops. The as-deposited bilayer film showed a hard magnetization. The bilayer film represented an easy magnetization with increasing the annealing temperature. The Au/Ni50Fe50 film that annealed at 723 K for 90 min had the lowest saturation magnetization.
基金Research project of Heyuan polytechnic(2022ky05,2022ky06)2019 Provincial Science and Technology Special Fund("Big project"+"Task List")project(2019005,2019004).
文摘Bilayer composite materials of Cu-coated Fe and CuSn10 containing 0%,5%,10%,15%,20%,25%,30%,35%,40%,45%,50%Cu-coated Fe were prepared in mesh belt sintering furnace.Microscopic pore morphology of materials was observed,bending strength was tested.Results show that,There is a good bonding between Cu-coated Fe and CuSn10,with the increase of Cu-coated Fe content from 0%to 50%,bending strength of bilayer composite materials increases.
文摘制备了在500℃下矫顽力为603.99 k A/m,最大磁能积为87.30 k J/m3的高温磁体。研究发现,在室温下,Fe含量较高的SmCo基磁体矫顽力较大,而高温下Fe含量高的磁体矫顽力较小。对磁体的微观形貌、相组成及磁体胞壁胞内成分进行分析,结果表明,随Fe含量升高,胞尺寸变大,1:5H相含量减少,胞壁相中Cu含量及胞内相中Fe含量升高。Fe和Cu元素在胞壁和胞内两相中含量的改变,导致了室温及高温两相畴壁能差的改变,从而引起了矫顽力的变化。