Magnetic behavior of FexNi((1-x)) and CoxNi((1-x)) pseudomorphic films on Cu(100)

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Date
1998-06-04
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American Institute of Physics
Abstract

We set out to compare the ferromagnetic behavior of FexNi(1-x) and CoxNi((1-x)) films of varying stoichiometry epitaxially grown on Cu(100). The thickness chosen was 5 ML over a wide alloy composition range. Using a scaling law for the thickness vs Curie temperature, we extrapolate the bulk fee film thickness and plot the bulk fee Curie temperature as a function of composition. The results suggest (a) that the Invar effect is quenched in these ultrathin pseudomorphic fee films of FexNi(1-x) alloys and (b) the magnetic phase of Fe atoms is the low-spin ferromagnetic phase. The CoxNi(1-x) films show the expected monotonic decrease in T-c with increasing Ni content. (C) 1996 American Vacuum Society.

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Keywords
SPIN-REORIENTATION TRANSITION, ULTRATHIN FE FILMS, ANGLE-RESOLVED PHOTOEMISSION, FCC IRON, ELECTRONIC-STRUCTURE, BAND-STRUCTURE, THIN-FILMS, ANISOTROPY, CO, DEPENDENCE, Engineering, Electrical & Electronic, Nanoscience & Nanotechnology, Physics, Applied, Engineering, Science & Technology - Other Topics, Physics
Citation
Wu, S., Schumann, F., Mankey, G., Willis, R. (1996): Magnetic Behavior of FexNi(1−x) and CoxNi(1−x) Pseudomorphic Films. Journal of Vacuum Science and Technology A, 14(4). DOI: https://doi.org/10.1116/1.588805