Ultra-high anisotropic magneto-mechanical damping in Fe-18at.%Ga single crystals
Ultra-high anisotropic magneto-mechanical damping in Fe-18at.%Ga single crystals
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DOI：
10.1016/j.scriptamat.2022.114552
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发表时间：
2022-04
影响因子：
6
通讯作者：
M. Sun;Lan Li;Caixing Liu;X. Liu;Weibin Jiang;Yawei Lei;Yunxia Gao;Zhijun Cheng;Xianping Wang;Z. Sheng;Xuebang Wu;Qianfeng Fang;Changsong Liu
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文献类型：
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作者：
M. Sun;Lan Li;Caixing Liu;X. Liu;Weibin Jiang;Yawei Lei;Yunxia Gao;Zhijun Cheng;Xianping Wang;Z. Sheng;Xuebang Wu;Qianfeng Fang;Changsong Liu
在Fe-18at中发现了温度和频率不敏感的超高各向异性磁滞型阻尼（MMHD）。%Ga单晶。[111]取向的Fe-Ga单晶在−100 ~ 150℃的宽温度范围内，阻尼值高达0.13 (Q−1，相当于特殊阻尼能力SDC为0.82)，远高于传统铁磁高阻尼合金（Fe-Cr/Al基合金）。然而，对于[001]取向的单晶，尽管沿[001]方向的磁致伸缩系数很大，但MMHD值几乎为零。通过磁畴分析，证明了MMHD起源于应力诱导的90°畴壁不可逆运动。Fe-Ga单晶的MMHD与取向因子呈正相关，超高弛豫强度与[001]方向的磁致伸缩和四方磁弹性耦合常数密切相关。
An ultra-high anisotropic magneto-mechanical hysteresis-type damping (MMHD) with temperature and frequency insensitivity was found in Fe-18at.%Ga single crystals. The [111]-orientated Fe-Ga single crystal exhibits a damping value up to 0.13 (Q−1, equivalent to a special damping capacity SDC of 0.82) in the wide temperature range of −100–150 °C, much higher than that of the conventional ferromagnetic high damping alloys (Fe-Cr/Al based alloys). For the [001]-orientated single crystal however, the MMHD value is almost zero despite the large magnetostrictive coefficient along [001] direction. Through magnetic domain analysis, it is demonstrated that MMHD originates from the stress-induced irreversible movement of 90° domain walls. The MMHD of Fe-Ga single crystals depends positively on the orientation factor, and the ultra-high relaxation strength is closely related to the magnetostriction in the [001] direction and the tetragonal magnetoelastic coupling constant.