Magnetic and Magnetomechanical Properties of CoAl $_{\rm x}$ Fe $_{2 - {\rm x}}$ O $_{4}$ for Stress Sensor and Actuator Applications
Magnetic and Magnetomechanical Properties of CoAl $_{\rm x}$ Fe $_{2 - {\rm x}}$ O $_{4}$ for Stress Sensor and Actuator Applications
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DOI：
10.1109/tmag.2009.2021846
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发表时间：
2009-09
影响因子：
2.1
通讯作者：
I. Nlebedim;N. Ranvah;Y. Melikhov;P. I. Williams;J. Snyder;A. Moses;D. Jiles
中科院分区：
文献类型：
--
作者：
I. Nlebedim;N. Ranvah;Y. Melikhov;P. I. Williams;J. Snyder;A. Moses;D. Jiles
研究了CoAlxFe2-xO4(x=0.1~0.9)磁力传感器的潜在应用。结果表明，随着Al含量的增加，磁致伸缩与外加磁场的关系曲线发生变化。此外，Al~(3+)的替代使应变对外加磁场(dlambda/dh)max的敏感性增加。Al掺杂(x=0.1)的最大磁致伸缩比未掺杂的Co铁氧体低34%，但(dlambda/dh)max高112%。Al掺杂样品的磁致伸缩大小仍足以满足应力传感器和执行器的应用。并与Ge、Ga、Cr和Mn掺杂的Co铁氧体的实验结果进行了比较。研究发现，CoAlxFe2-xO4在改善外场应变响应的同时，保持较大的磁致伸缩幅度，在磁机械应力传感器方面具有广阔的应用前景。
The potential of CoAlxFe2-xO4 (x = 0.1 to 0.9) for magnetomechanical stress sensor applications has been studied. It was found that the plot of magnetostriction against applied magnetic field changed shape as Al content increased. Furthermore, substituting with Al3+ resulted in the increase of the sensitivity of strain to applied magnetic field (dlambda/dH)max. The maximum magnetostriction for the Al-doped (x = 0.1) was 34% lower than un-doped Co-ferrite but the (dlambda/dH)max was 112% higher. The magnitude of magnetostriction obtained for Al-doped samples is still sufficient for stress sensor and actuator applications. Results were compared with those obtained for Ge-, Ga-, Cr- and Mn-doped Co-ferrites. It was found that in terms of improving strain response to applied field whilst maintaining significant amplitude of magnetostriction CoAlxFe2-xO4 has promising potential for magnetomechanical stress sensor applications.