Journal ArticleDOI
Perpendicular magnetic anisotropy induced by tetragonal distortion of FeCo alloy films grown on Pd(001).
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TLDR
Using LEED Kikuchi patterns, a change of the easy axis of magnetization can be related to a decrease of the tetragonal distortion with thickness, and the magnetic anisotropy was investigated using the magneto-optical Kerr effect.Abstract:
We grew tetragonally distorted FexCo1-x alloy films on Pd(001). Theoretical first-principles calculations for such films predicted a high saturation magnetization and a high uniaxial magnetic anisotropy energy for specific values of the lattice distortion c/a and the alloy composition x. The magnetic anisotropy was investigated using the magneto-optical Kerr effect. An out-of-plane easy axis of magnetization was observed for Fe0.5Co0.5 films in the thickness range of 4 to 14 monolayers. The magnetic anisotropy energy induced by the tetragonal distortion is estimated to be almost 2 orders of magnitude larger than the value for bulk FeCo alloys. Using LEED Kikuchi patterns, a change of the easy axis of magnetization can be related to a decrease of the tetragonal distortion with thickness.read more
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Magnetism in ultrathin film structures
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.
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Handbook of Magnetic Materials
TL;DR: In this paper, the density functional theory of the ground state magnetic properties of rare earths and actinides is presented, as well as the properties of binary rare-earth 3d-transition-metal intermetallic compounds.
Journal ArticleDOI
Current progress and future challenges in rare-earth-free permanent magnets
Jun Cui,Jun Cui,Matthew J. Kramer,Matthew J. Kramer,Lin Zhou,Fei Liu,Alexander Gabay,George C. Hadjipanayis,Balamurugan Balasubramanian,David J. Sellmyer +9 more
TL;DR: In this paper, the authors review the science and technology of various types of non-RE materials for permanent magnet applications and discuss the current status, challenges, potentials, and future directions for these candidates.
Journal ArticleDOI
From the computer to the laboratory: materials discovery and design using first-principles calculations
TL;DR: Examples of ab initio computational materials design are provided, focusing on instances in which a computational approach has been successfully applied to propose new materials of technological interest in the laboratory, demonstrating that computationally guided materials design is a broadly applicable technique.
References
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Book
Handbook of Magnetic Materials
TL;DR: In this paper, the density functional theory of the ground state magnetic properties of rare earths and actinides is presented, as well as the properties of binary rare-earth 3d-transition-metal intermetallic compounds.