Magnetostrictive films are required for a wide range of device applications; by increasing the magnetostriction constant and decreasing the anisotropy field, the devices will become more efficient. This paper has studied Fe30Co70 films on different thicknesses of the soft magnetic underlayer Ni81Fe19, to determine how the structural and magnetic properties change. It was found that the anisotropy field of the Fe30Co70 film could be reduced by 50% to 10 kA/m and the magnetostriction constant increased by a factor 4 to 65 ppm when grown on 30 nm Ni81Fe19. This was due to the NiFe underlayer inducing a BCC(110) texture within the Fe30Co70 film and reducing the in-plane stress.
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机译：磁致伸缩薄膜是广泛的设备应用所必需的。通过增加磁致伸缩常数并减小各向异性场，器件将变得更加高效。本文研究了不同厚度的软磁衬层Ni81Fe19上的Fe30Co70膜，以确定其结构和磁性能如何变化。发现当在30 nm Ni81Fe19上生长时，Fe30Co70薄膜的各向异性场可以降低50％至10 kA / m，磁致伸缩常数提高4至65 ppm。这是由于NiFe底层在Fe30Co70膜内引起BCC（110）织构并降低了面内应力。
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