Abstract
This study was undertaken to probe any thickness dependence of the magnetic ordering inHo film samples of thickness 1000 monolayers (ML), 100 ML and 50 ML. The study wascarried out on the antiferromagnetic helical magnetic phase in the temperature range . The magnetism was studied by x-ray magnetic scattering using the resonant process at the HoLIII absorption edge, 8.071 keV. It was found that the magnetic modulation wavevector,τ, of the Ho helical structure changed systematically with temperature over the range. No evidence of a change in τ with changing layer thickness was seen. The value of the Néel temperatureTN decreased from 130 K for the 1000 ML sample to 110 K for the 50 ML sample. The critical exponentβ of the transition between the helical to paramagnetic state is measured asβ≈0.5 for the 1000 and 100 ML samples compared to a literature value ofβ = 0.39 for bulk. For the50 ML film, β = 0.28 ± 0.05. Themeasured values of β are discussed in terms of strain and reduced dimensionality.
Sign-in/Register to access full text options 
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.
