Abstract
MnAl films prepared in a form of multilayer Mn/Al by vacuum evaporation were investigated. In the Mn content-range of 31∼40 at.%, the films become ferromagnetic (τ-phase) by annealing between 220∼ 420°C. They show the same X-ray diffraction lines of fct(Cu-Au I) structure as bulk MnAl alloy, although the Mn composition range for the τ phase is quite different from that of the bulk; 51-59 at.%. In the films, τ-phase is mixed with a nonmagnetic η-phase below 34 at.% Mn and with a β-phase above 36 at.% Mn. Ms changes with Mn content and shows a maximum of ∼330 emu/cm3 at about 36 at.%Mn. Hc increases from 1 to 6 kOe with increasing Mn content. The θk increases with decreasing wavelength λ and obtains a value of about 0.17° at 400 nm. while the reflectivity R has a value of above 40% in the visible wavelength range.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.