Heat Treatment Effect on Magnetic Properties in Rapidly Solidified Co-Fe Alloy
Heat Treatment Effect on Magnetic Properties in Rapidly Solidified Co-Fe Alloy
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DOI：
10.2320/jinstmet.jaw201509
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发表时间：
2015-09-01
影响因子：
0.5
通讯作者：
Furuya, Yasubumi
中科院分区：
文献类型：
--
作者：
Kimura, Natsuko;Kubota, Takeshi;Furuya, Yasubumi
为了制备高性能的磁敏传感器，本文研究了热处理对快速凝固高Co含量Co-Fe合金的影响。采用单铜辊快速凝固技术制备了Co含量为71和75at%、厚度为70 μ m的Co-Fe合金薄带，并对其进行了热处理。为了评价热处理效果，测量了Co 71 Fe 29薄带的磁化强度、矫顽力、磁致伸缩和磁化率等磁性能以及晶体结构，结果表明，经750 ℃退火的Co 71 Fe 29薄带的饱和磁化强度和饱和磁致伸缩没有明显变化，与退火时间无关。另一方面，Co 75 Fe 25合金薄带的磁化强度和磁致伸缩均显示出退火时间依赖性，发现短时间退火对增加饱和磁致伸缩是有效的。在750 ℃退火的Co 75 Fe 25合金薄带的最大饱和磁致伸缩达到96 ppm，比Co 71 Fe 29合金的最大饱和磁致伸缩高33%。结果，退火后的Co 75 Fe 25合金薄带的磁致伸缩敏感性变得比退火后的Co 71 Fe 29合金薄带的磁致伸缩敏感性高，并且认为最佳退火后的Co 75 Fe 25合金薄带具有作为磁传感器的元件材料的优异功能。
In this study, heat treatment effect on the rapidly solidified Co-Fe alloys with high Co content was investigated for synthesizing a compact magnetic sensor with high-performance. The Co-Fe alloy ribbons with 71 and 75 at% Co and with 70 pm in the thickness were produced by a single Cu-roller rapid solidification, and subsequently heat treatment was conducted. For evaluation of the heat treatment effect, magnetic properties such as magnetization, coercivity, magnetostriction and susceptibility were measured as well as crystal structure.The saturation magnetization and saturation magnetostriction for the Co71Fe29 ribbon annealed at 750 degrees C exhibited no remarkable change without any relation to the annealing time. On the other hand the Co75Fe25 alloy ribbon revealed annealing time dependency of both magnetization and magnetostriction, it was found that the short time annealing is effective in increasing the saturation magnetostriction. Maximal saturation magnetostriction of the Co75Fe25 alloy ribbon annealed at 750 degrees C reached to 96 ppm, 33% higher than that of the Co71Fe29 alloy. As a result magnetostrictive susceptibility for the annealed Co75Fe25 alloy ribbon became higher than that of the annealed Co71Fe29 alloy ribbon and it is considered that the optimal annealing Co75Fe25 alloy ribbon has excellent functionalities as an element material of the magnetic sensor.