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| 脉冲磁场致非晶合金纳米晶化及巨磁阻抗研究 | |
| 引用本文： | 郭 红,晁月盛,金 莹.脉冲磁场致非晶合金纳米晶化及巨磁阻抗研究[J].稀有金属材料与工程,2011,40(7):1163-1167. |
| 作者姓名： | 郭 红 晁月盛 金 莹 |
| 作者单位： | 1. 东北大学,辽宁沈阳,110004;辽宁石油化工大学,辽宁抚顺,113001 2. 东北大学,辽宁沈阳,110004 3. 辽宁石油化工大学,辽宁抚顺,113001 |
| 基金项目： | 高等教育博士专项基金(20020145009) |
| 摘 要： | 对Co68.15Fe4.35Si12.5B15非晶合金薄带进行低频脉冲磁场处理，M?ssbauer谱分析及透射电镜(TEM)观察结果表明，样品发生了初始纳米晶化，晶化量与磁脉冲强度有关。采用巨磁阻抗(简称GMI)测量仪测量样品GMI，结果显示GMI与脉冲磁场强度HP呈非单调变化规律，HP为350 kA·m-1时样品具有最大GMI，其值为263.5%。磁脉冲在样品内感生的横向各向异性对GMI效应产生影响，当外加直流磁场Hex等于感生磁各向异性场Hk时，GMI出现峰值 |
| 关 键 词： | 低频脉冲磁场 非晶合金纳米晶化 巨磁阻抗效应 |
| 收稿时间： | 2010/7/21 0:00:00 |
Study of Amorphous Alloy Nano-crystallization and Giant Magnetic Impedance by Pulsing Magnetic Field |
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| Guo Hong,Chao Yuesheng and Jin Ying.Study of Amorphous Alloy Nano-crystallization and Giant Magnetic Impedance by Pulsing Magnetic Field[J].Rare Metal Materials and Engineering,2011,40(7):1163-1167. | |
| Authors: | Guo Hong Chao Yuesheng and Jin Ying |
| Affiliation: | Northeastern University, Shenyang 110004, China |
| Abstract: | Amorphous Co68.15Fe4.35Si12.5B15 alloy ribbons were treated by low-frequency pulsing magnetic field. M?ssbauer spectroscopy and TEM observation show that initial nano-crystallization of the amorphous samples occurs, and the volume fraction of crystallized phase has a relation with pulsing magnetic field intensity. The giant magnetic impedance (GMI ) of the samples were tested by a GMI instrument; the results show a non-monotonic change between GMI and pulsing magnetic field intensity HP, and the GMI reaches the greatest value of 263.5% under the magnetic field intensity HP=350 kA·m-1. The transverse anisotropy induced by pulsing magnetic field in specimens affects the GMI effect. When the external dc current magnetic filed Hex is equal to Hk, GMI reaches the peak value |
| Keywords: | low-frequency pulsing magnetic field nano-crystallization of amorphous alloy giant magnetic impedance effect |
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