Magnetic anisotropy evolution with Fe content in electrodeposited Ni100-xFex thin films

被引:3
作者
Begue, A. [1 ,2 ]
Coton, N. [1 ]
Ranchal, R. [1 ,3 ]
机构
[1] Univ Complutense Madrid, Fac CC Fis, Dept Fis Mat, Ciudad Univ s-n, Madrid 28040, Spain
[2] Univ Zaragoza, Fac Ciencias, Zaragoza 50009, Spain
[3] UCM, Inst Magnetismo Aplicado, ADIF, CSIC, Las Rozas 28232, Spain
关键词
SACCHARIN;
D O I
10.1039/d4tc01189a
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this study, we have experimentally and theoretically determined how the magnetic anisotropy of Ni100-xFex thin films evolves as a function of the Fe content in electrodeposited samples. When the Fe content is below 12 at%, stripe domains are promoted once the thickness exceeds a critical value. For an Fe content of 7 at%, the transcritical shape is present in the hysteresis loop for a thickness of 600 nm. However, for compositions equal to or above 12 at%, we have not found evidence of stripe domains, as indicated by the absence of the transcritical shape in the hysteresis loops for layer thicknesses as high as 1 mu m even if a magnetic field is applied perpendicular to the sample plane during growth. All the studied layers are polycrystalline with a < 111 > texture. The experimental results are understood in the framework of a theoretical model which considers different contributions to the magnetic anisotropy: magnetocrystalline, magnetoelastic, magnetostatic and from pairs. Out-of-plane anisotropy promoted by columnar growth has not been considered as the saccharine-based electrolyte used for the electrodeposition prevents it. In fact, the magnetic anisotropy related to pairs, which is not generally taken into account in models for Ni100-xFex, appears to play a crucial role in these thin films. Fitting of the experimental results to this model reveals that the local anisotropy generated by pairs can be as high as 3.30 x 10(6) J m(-3). This theoretical and experimental combined investigation highlights the relevance of all these fundamental mechanisms for the understanding and tuning of magnetic materials.
引用
收藏
页码:10104 / 10109
页数:6
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