Correlations between structures and magnetic properties, longitudinal and transverse transport behaviors of non-epitaxial Fe3Si/MgO(001) films. (September 2021)

• Record Type: Journal Article
• Authors: Xie, Jing; Liao, Yangfang; Wu, Dongni; Xie, Quan
• Is Part Of: Vacuum. Volume 191(2021)
• Publication Date: 2021-09
• Subjects: Fe3Si films -- Non-epitaxial -- Structures -- Magnetic properties -- Transport behaviors; Vacuum -- Periodicals; 621.55
• DOI: 10.1016/j.vacuum.2021.110325
• Languages: English
• ISSNs: 0042-207X

Abstract

Abstract: The purpose of this work is to investigate the correlations between structures and magnetic properties, transport behaviors of non-epitaxial Fe3 Si films fabricated on MgO(001) substrates. Firstly, the single phase polycrystalline Fe3 Si films are obtained. These Fe3 Si films appear rough texture, which is related to inter-diffusion between Fe and Si layers under high temperature annealing. Moreover, the disparities of M s and H c values for these Fe3 Si films are linked to structural and chemical order. A particular case in Fe3 Si film formed at Fe/Si thickness ratio of 3:1 for 800 °C is observed. The Fe3 Si film which fulfills fundamental reflections has high M s and low H c value. The electron-electron and anomalous one magnon scattering contributions to the resistivity are operative in low temperature range and the electron-phonon interaction governs it at high temperature region. Finally, the intrinsic anomalous Hall effect contribution is dominating over extrinsic contributions by suitable scaling behavior. The intrinsic factor dominance rises with the improvement of atomic ordering. This law is not followed for the Fe3 Si film which fulfills fundamental reflections. The highest intrinsic band structure effect b value in this Fe3 Si film is attributed to the influence of the film thickness and Fe and Si atomic composition ratio. Highlights: Single phase Fe3 Si non-epitaxial films have been obtained on MgO(001). These non-epitaxial Fe3 Si films appear rough texture. The M s values of Fe3 Si films are close to the bulk value. Anomalous one magnon scattering is operative for ferromagnetic Heusler alloy films. Intrinsic AHE contribution is dominating over extrinsic ones by suitable scaling law.