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논문 기본 정보

자료유형
학술저널
저자정보
Seungha Yoon (Korea Institute of Industrial Technology)
저널정보
한국자기학회 Journal of Magnetics Journal of Magnetics Vol.27 No.3
발행연도
2022.9
수록면
238 - 241 (4page)
DOI
10.4283/JMAG.2022.27.3.238

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초록· 키워드

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The magnetostriction effect is a unique phenomenon observed in magnetic materials due to applied stress. The permeability μ of the magnetic material increases or decreases depending on the sign of the magnetostriction coefficient λ based on the direction of the applied stress. For example, nickel has a negative λ, whereas iron has a positive λ for the same tensile (+) or compressive (-) stresses. However, the magnetostriction effect is reported to disturb the functionality of some spintronic applications, such as magnetic sensors and actuators, under the influence of an external magnetic field. Therefore, suppression of the magnetostriction effect is a challenge in developing flexible spintronic devices. In this study, the magnetostriction effect of the Ni<SUB>x</SUB>Fe<SUB>1-x</SUB> thin films was investigated under different stress conditions. The composition of the thin film was manipulated by varying the deposition thickness of nickel and Ni<SUB>8</SUB>Fe₂ targets using a co-sputtering system. Magnetization reversal behaviors of the Ni<SUB>x</SUB>Fe<SUB>1-x</SUB> thin films were observed under the influence of an external magnetic field by using a vibrating sample magnetometer (VSM), before and after the application of bending stress. The negative magnetostriction effect of nickel was decreased by increasing the iron composition in the thin film, owing to the opposite sign of the magnetostriction coefficient. Finally, an extremely low magnetostriction was achieved at x = 0.8. The results of this study suggest that the magnetostriction effect can be controlled by varying the composition of the thin films and a sufficiently small magnetostriction effect can be observed at the permalloy composition between nickel and iron.

목차

1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusion
References

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