[Publication] Unveiling transport properties of Co2MnSi Heusler epitaxial thin films with ultra-low magnetic damping
Our researchers performed the transport measurements on a series of Co2MnSi(001) epitaxial films with variable thickness (4-45nm), fabricated in the Quaternary MBE on the D.A.U.M. Tube and patterned using MiNaLor facilities.
The key point of this study consisted in carrying out these measurements on films possessing remarkable magnetic damping coefficients in the 10-4 range (world record to the credit of Spintronics and Nanomagnetism group), measured on the series and proof of the magnetic half-metallic character of the studied films.
The conductivity of the films was measured on Hall crosses (figure below) as a function of the various controllable parameters (thickness, temperature, applied magnetic field) in order to extract the conductivity/resistivity, the inelastic mean free path of the electrons, the type and quantity of carriers and their mobility, the AMR (Anisotropic Magneto-Resistance), the Hall coefficients (ordinary and anomalous Hall effect), the Hall angle and the preponderant scattering process.
Références :
Title: Unveiling transport properties of CO2MnSi Heusler epitaxial thin films with ultra-low magnetic damping
Authors : Claudia de Melo, Charles Guillemard, Anna Maria Friedel, Victor Palin, Juan-Carlos Rojas-Sánchez, Sébastien Petit-Watelot, Stéphane Andrieu
Journal : Applied Materials Today
Date of publication (online): December 2021
Links:
https://hal.univ-lorraine.fr/hal-03399352
https://www.sciencedirect.com/science/article/abs/pii/S2352940721002389
Image caption: Illustration of the Hall cross device and examples of measurements
