Dynamic Magneto-mechanical Behavior of an Iron-nickel-based Ferromagnetic Alloy with Constant Elasticity
Dynamic Magneto-mechanical Behavior of an Iron-nickel-based Ferromagnetic Alloy with Constant Elasticity
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DOI：
10.4283/jmag.2009.14.2.066
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发表时间：
2009-06
影响因子：
0.5
通讯作者：
L. Bian;Y. Wen;Ping Li;Q. Gao;Xianxue Liu
中科院分区：
文献类型：
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作者：
L. Bian;Y. Wen;Ping Li;Q. Gao;Xianxue Liu
研究了一种铁镍基恒弹性铁磁合金的动态磁力行为与直流偏置磁场和频率的关系。矩形板状样品在叠加了不同H DC的交流磁场的激励下，以半波长、纵向共振的方式振动。实验结果表明，谐振时的应变系数达到819.34㎚/A，有效机械品质因数Qm大于2 0 0 0。由于所谓的恒弹性，零偏置场下杨氏模量值对Hdc的最大变化与杨氏模量值的比值仅为0.83‰。HDC对谐振应变系数和Qm有很强的依赖性，这在直流和准静态磁场传感中具有广阔的应用前景。
The dynamic magneto-mechanical behaviors in a type of iron-nickel-based ferromagnetic alloy with constant elasticity were investigated as a function of both the DC bias magnetic field (H dc ) and the frequency. The rectangular plate-like samples were excited to vibrate at a half-wavelength, longitudinal resonance by an AC magnetic field superimposed with various H dc . The experimental results found that the strain coefficient at resonance reached 819.34 ㎚/A and the effective mechanical quality factor (Q m ) was greater than 2000. The ratio of the maximum variation of the Young’s modulus over H dc to the value of the Young’s modulus at a zero bias field was only ~0.83‰ because of the so-called constant elasticity. The resonant strain coefficients and Q m are strongly dependent on Hdc, which indicates a promising potential for use in DC and quasistatic magnetic field sensing.