RT Journal Article
T1 Magnetic anisotropy evolution with Fe content in electrodeposited Ni100xFex thin films
A1 Begué, Andrián
A1 Cotón Sánchez, Noelia
A1 Ranchal Sánchez, Rocío
AB 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 μm 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 × 106 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.
PB Royal Society of Chemistry
YR 2024
FD 2024-06
LK https://hdl.handle.net/20.500.14352/109413
UL https://hdl.handle.net/20.500.14352/109413
LA eng
NO A. Begué, N. Cotón and R. Ranchal, Magnetic anisotropy evolution with Fe content in electrodeposited Ni 100− x Fe x thin films, J. Mater. Chem. C, 2024, 12, 10104–10109.
NO 2024 Acuerdos transformativos CRUE
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Ministerio de Universidades (España)
DS Docta Complutense
RD 19 mar 2026