Growth and Magnetic Properties of CoₓNi₁₋ₓ and FeₓNi₁₋ₓ Ultrathin Films on Cu(100)

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dc.contributor.author Mankey, Gary
dc.date.accessioned 2019-07-18T18:04:13Z
dc.date.available 2019-07-18T18:04:13Z
dc.date.issued 1997-08-01
dc.identifier.citation Schumann, F., Wu, S., Mankey, G., Willis, R. (1997): Growth and Magnetic Properties of CoₓNi₁₋ₓ and FeₓNi₁₋ₓ Ultrathin Films on Cu(100). Physical Review B, 56(5). DOI: https://doi.org/10.1103/PhysRevB.56.2668 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/5988
dc.description.abstract We have grown ultrathin CoₓNi₁₋ₓ and FeₓNi₁₋ₓ films on Cu(100) with varying stochiometry x. We find that these alloy films grow in a fcc phase on Cu(100). With the surface magneto-optic Kerr effect we measured the variation of the Curie temperature T_c as a function of the film thickness n in monolayers. Fitting an empirical scaling curve to our results we are able to extrapolate the value T_c(n=[infinity])for samples with different stochiometry. We use this framework in order to determine T_c(n=[infinity]) for FeₓNi₁₋ₓ alloy films, in particular for concentrations close to 65% Fe content. Bulk Fe₆₅Ni₃₅ shows a collapse of magnetic long-range order and a fcc-to-bcc structural transition, which is the so-called Invar effect. In ultrathin Fe₆₅Ni₃₅ films, we observe a ‘‘quenching’’ of the Invar effect, because growth on a Cu(100) substrate forces the film to adopt the Cu lattice spacing thereby suppressing the structural relaxation. en_US
dc.format.mimetype application/pdf en_US
dc.language English
dc.title Growth and Magnetic Properties of CoₓNi₁₋ₓ and FeₓNi₁₋ₓ Ultrathin Films on Cu(100) en_US
dc.type text en_US


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