Author
V.M. Floka
Bio: V.M. Floka is an academic researcher from National Academy of Sciences of Ukraine. The author has contributed to research in topics: Electronic structure & Magnetic moment. The author has an hindex of 3, co-authored 6 publications receiving 49 citations.
Papers
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TL;DR: The results of the ab initio self-consistent spin-polarized FLAPW calculations of the electronic structure of seven-layer Cr(100, Fe(100), and Ni(100) films are presented in this paper.
24 citations
TL;DR: In this paper, self-consistent spin-polarized FLAPW calculations of the electronic structure of the FeTi (100) surface have been performed and the seven-layer symmetrical film with the surface layer formed by atoms of Fe was considered.
11 citations
TL;DR: In this paper, the electronic structure of (001) surfaces of the B2-structure alloys, FeAl, CoAl and NiAl, has been calculated using the scalar-relativistic, spin-polarized FLAPW method.
8 citations
3 citations
TL;DR: In this article, the results of spin-consistent spin-polarized FLAPW calculations of the electronic structures of seven-layer Fe(100 and Ni(100) films are presented.
3 citations
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TL;DR: In this article, the results of recent experimental and theoretical studies of well characterized epitaxial structures based on Fe, Co and Ni to illustrate how intrinsic fundamental properties such as the magnetic exchange interactions, magnetic moment and magnetic anisotropies change markedly in ultrathin films as compared with their bulk counterparts, and to emphasize the role of atomic scale structure, strain and crystallinity in determining the magnetic properties.
Abstract: In this paper, we review some of the key concepts in ultrathin film magnetism which underpin nanomagnetism. We survey the results of recent experimental and theoretical studies of well characterized epitaxial structures based on Fe, Co and Ni to illustrate how intrinsic fundamental properties such as the magnetic exchange interactions, magnetic moment and magnetic anisotropies change markedly in ultrathin films as compared with their bulk counterparts, and to emphasize the role of atomic scale structure, strain and crystallinity in determining the magnetic properties. After introducing the key length scales in magnetism, we describe the 2D magnetic phase transition and survey studies of the thickness dependent Curie temperature and the critical exponents which characterize the paramagnetic–ferromagnetic phase transition. We next discuss recent experimental and theoretical results on the determination of the exchange constant, followed by an overview of measurements of the magnetic moment in the elemental 3d transition metal thin films in the various crystal phases that have been successfully stabilized, thereby illustrating the sensitivity of the magnetic moment to the local symmetry and to the atomic environment. Finally, we discuss briefly the magnetic anisotropies of Fe, Co and Ni in the fcc crystalline phase, to emphasize the role of structure and the details of the interface in influencing the magnetic properties. The dramatic effect that adsorbates can have on the magnetic anisotropies of thin magnetic films is also discussed. Our survey demonstrates that the fundamental properties, namely, the magnetic moment and magnetic anisotropies of ultrathin films have dramatically different behaviour compared with those of the bulk while the comparable size of the structural and magnetic contributions to the total energy of ultrathin structures results in an exquisitely sensitive dependence of the magnetic properties on the film structure.
516 citations
TL;DR: In this paper, the topmost layer relaxations reproduce well the experimental contractions and their variation with the surface crystallographic orientation, and surface roughness, and can be explained in terms of a simple electrostatic picture.
199 citations
TL;DR: In this paper, the electronic, magnetic and structural properties of atomic oxygen adsorbed in on-surface and subsurface sites at the two most densely packed iron surfaces were investigated using density functional theory combined with a thermodynamics formalism.
118 citations
TL;DR: In this article, the structural properties and surface relaxations of bcc-Fe and AISI-304 stainless steel surfaces were investigated by using first-principles total energy calculations.
108 citations
TL;DR: In this article, the structural, electronic and magnetic properties of the low-index surfaces of Nickel have been investigated via fully selfconsistent ab-initio local spin density functional (LSDF) calculations.
107 citations