Abstract
A detailed study of the Fe2 − xCoxMnSi (0 ≤ x ≤ 0.6) alloys has been carried out by investigating the samples by x-ray diffraction, Mössbauer spectroscopy, magnetization, transport and current spin polarization measurements. A perfectly ordered L21 phase is found to exist for x = 0.4. Competing magnetic interactions between ferromagnetic and antiferromagnetic (AFM) phases are seen in the alloys with x < 0.2, whereas the AFM phase is completely absent for x ≥ 0.2 as revealed by the magnetization and resistivity data. The Curie temperature and saturation magnetization values increase with increase in the Co concentration. Anomalous, non metallic-like behaviour is observed for x = 0.4. Current spin polarization values of 0.61 ± 0.01 and 0.66 ± 0.01 were deduced for x = 0.2 and x = 0.4 respectively, using the point contact Andreev reflection spectroscopy . Considering the high spin polarization and Curie temperature, materials with x ≥ 0.2 appear to be very promising for spintronic devices.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
