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ZELENÝ, M. DLOUHÝ, I.
Original Title
Magnetism of coherent Co and Ni thin films on Cu(111) and Au(111) substrates: An ab initio study
Type
journal article in Web of Science
Language
English
Original Abstract
We present an ab initio study of structural and magnetic properties of coherent Co and Ni thin films on Cu(111) and Au(111) substrates with thicknesses of up to 6 monolayers. All studied films on Cu(111) substrates prefer structures close their ground state (hcp for Co and fcc for Ni), whereas only the hcp stacking sequence has been found for both films on Au(111) substrates. All studied films exhibit instability of the first monolayer with respect to decomposition into 2-monolayer- or 3-monolayer-high islands, which is in agreement with experimental findings. All studied films are also ferromagnetic, nevertheless the Ni/Cu(111) films reduce their magnetic moments in the layer adjacent to the substrate due to a stronger Cu–Ni interaction at the interface. The magnetic anisotropy of a Co film does not depend on the film thickness: all the studied Co/Au(111) films exhibit a perpendicular magnetic anisotropy, whereas all the Co/Cu(111) films prefer in-plane magnetization. On the other hand, both Ni films change their preference for in-plane orientation of their easy axis to out-of-plane orientation at a critical thickness of 2 monolayers, however, the magnetic anisotropy energies for films thicker than 1 monolayer are smaller than 1 meV/Ni atom. These behaviors of magnetic anisotropy do not depend on the structure of the studied films.
Keywords
Thin films; Magnetic anisotropy; Ab initio calculations; fcc–hcp transformation
Authors
ZELENÝ, M.; DLOUHÝ, I.
Released
15. 2. 2017
Publisher
Elsevier
ISBN
0304-8853
Periodical
J. Magnetism Magn. Mat.
Year of study
424
Number
-
State
Kingdom of the Netherlands
Pages from
394
Pages to
401
Pages count
8
URL
http://www.sciencedirect.com/science/article/pii/S0304885316314329
BibTex
@article{BUT129283, author="Martin {Zelený} and Ivo {Dlouhý}", title="Magnetism of coherent Co and Ni thin films on Cu(111) and Au(111) substrates: An ab initio study", journal="J. Magnetism Magn. Mat.", year="2017", volume="424", number="-", pages="394--401", doi="10.1016/j.jmmm.2016.07.027", issn="0304-8853", url="http://www.sciencedirect.com/science/article/pii/S0304885316314329" }