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甩带Fe₈₅Ga₁₅合金的巨磁致伸缩研究

Giant magnetostriction of melt_spun Fe₈₅ Ga₁₅ ribbons

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【作者】刘国栋；李养贤；胡海宁；曲静萍；柳祝红；代学芳；张铭；崔玉亭；陈京兰；吴光恒；

【Author】 Liu Guo_Dong 1)2) Li Yang_Xian 1) Hu Hai Ning 2) Qu Jing Ping 1) Liu Zhu Hong 2) Dai Xue Fang 2) Zhang Ming 2) Cui Yu Ting 2) \ Chen Jing Lan 2) Wu Guang Heng 2) 1) (School of Material Sciences and Engineering, Hebei University of Technology, Tianjin 300130,China) 2) (State Key Laboratory for Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China)

【机构】河北工业大学材料学院；中国科学院物理研究所磁学国家重点实验室；中国科学院物理研究所磁学国家重点实验室天津300130中国科学院物理研究所磁学国家重点实验室；北京100080；天津300130；北京100080；

【摘要】利用甩带快淬方法制备了Fe85Ga1 5合金样品 .测量了样品在沿带片长度方向和厚度方向上的磁致伸缩 ,发现其值分别高达 - 1 30 0ppm和 +1 1 0 0ppm .巨大磁致伸缩的获得来源于甩带样品的形状各向异性和合金内部生成的大量短程应变有序以及它们的择优取向 .样品温度特性的测量表明 ,在室温附近约 6 0℃宽的温度范围 ,合金的磁致伸缩数值基本保持不变 ;而在高温条件下 ,合金具有更大的磁致伸缩更多还原

【Abstract】 Large magnetostrictions of -1300 and +1100 ppm have been obtained in our Fe 85 Ga 15 ribbon samples. This was attributed to the shape anisotropy of ribbon and the existence of Ga atom clusters with preferential orientation in the melt-spun Fe 85 Ga 15 alloys. A small increase of magnetostriction with increasing temperature was observed between 163 and 321K. However, at higher temperatures, the magnetostriction increases sharply with increasing temperature.更多还原