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Epsilon-near-zero materials are exceptional candidates for studying electrodynamics and nonlinear optical processes at the nanoscale. We demonstrate that by alternating a metal and a highly doped conducting-oxide, the epsilon-near-zero…

We present a detailed theoretical investigation on the magnetic properties of small single-layered Fe, Co and Ni clusters deposited on Ir(111), Pt(111) and Au(111). For this a fully relativistic {\em ab-initio} scheme based on density…

Materials Science · Physics 2015-06-04 S. Bornemann , O. Šipr , S. Mankovsky , S. Polesya , J. B. Staunton , W. Wurth , H. Ebert , J. Minár

Recent ab intio studies of the magnetic properties of all 3d transition metal(TM) freestanding atomic chains predicted that these nanowires could have a giant magnetic anisotropy energy (MAE) and might support a spin-spiral structure,…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 J. C. Tung , Y. K. Wang , G. Y. Guo

Bulk metallic samples were synthesized from different binary powder mixtures consisting of elemental Cu, Co, and Fe using severe plastic deformation. Small particles of the ferromagnetic phase originate in the conductive Cu phase, either by…

We examine the magnetic phase diagram of iron pnictides using a five band model. For the intermediate values of the interaction expected to hold in the iron pnictides, we find a metallic low moment state characterized by antiparallel…

Strongly Correlated Electrons · Physics 2010-06-09 E. Bascones , M. J. Calderon , B. Valenzuela

Heusler alloys with $Ni-Mn-Cu$ (all d-transition metal) composition have been studied; equilibrium structures for different magnetic configurations are found. Elastic constants and tetragonal distortion are analyzed. Distortion effect on…

Materials Science · Physics 2023-08-22 A. Alés

We report for the first time the magnetic structure of the high entropy oxide $(Mg_{0.2}Co_{0.2}Ni_{0.2}Cu_{0.2}Zn_{0.2})O$ using neutron powder diffraction. This material exhibits a sluggish magnetic transition but possesses a long-range…

Oxides have long been regarded as intrinsically brittle due to their strong, directional ionic or covalent bonds, in stark contrast to the ductile behavior of metals, where delocalized electron sharing enables plasticity through facile…

Materials Science · Physics 2025-05-22 Xiangkai Chen , Yuhong Li , Xiaofei Zhu , Yun-Long Tang , Shi Liu

We describe implementation and analysis of a first-principles theory, derived in an earlier work, for the leading terms in an expansion of a Gibbs free energy of a multi-component alloy in terms of order parameters that characterize…

Materials Science · Physics 2025-02-24 Christopher D. Woodgate , Julie B. Staunton

Co-doped ZnO is the prototypical dilute magnetic oxide showing many of the characteristics of ferromagnetism. The microscopic origin of the long range order however remains elusive, since the conventional mechanisms for the magnetic…

Materials Science · Physics 2015-05-18 Thomas Archer , Chaitanya Das Pemmaraju , Stefano Sanvito

The article addresses the possibility of alloy elements in MnBi which may modify the thermodynamic stability of the NiAs-type structure without significantly degrading the magnetic properties. The addition of small amounts of Rh and Mn…

Correlated electron systems, particularly iron-based superconductors, are extremely sensitive to strain, which inevitably occurs in the crystal growth process. Built-in strain of this type has been proposed as a possible explanation for…

Strongly Correlated Electrons · Physics 2021-07-16 Mainak Pal , Laetitia Bettmann , Andreas Kreisel , P. J. Hirschfeld

We present an extensive experimental and theoretical study on the low-temperature magnetic properties of the monoclinic anhydrous alum compound BaMo(PO$_4$)$_2$. The magnetic susceptibility reveals strong antiferromagnetic interactions…

Magnetism at the nanoscale has been a very active research area in the past decades, because of its novel fundamental physics and exciting potential applications. We have recently performed an {\it ab intio} study of the structural,…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 J. C. Tung , G. Y. Guo

Interest in creating magnetic metamaterials has led to methods for growing superstructures of magnetic nanoparticles. Mesoscopic crystals of maghemite ($\gamma\text{-Fe}_2\text{O}_3$) nanoparticles can be arranged into highly ordered…

Mesoscale and Nanoscale Physics · Physics 2021-01-05 B. Gross , S. Philipp , E. Josten , J. Leliaert , E. Wetterskog , L. Bergström , M. Poggio

Transport and magnetic properties of LSMO manganite thin films and bicrystal junctions were investigated. Manganite films were epitaxially grown on STO, LAO, NGO and LSAT substrates and their magnetic anisotropy were determined by two…

Materials Science · Physics 2012-10-09 G. A. Ovsyannikov , V. V. Demidov , A. M. Petrzhik , I. V. Borisenko , A. V. Shadrin , R. Gunnarsson

The exchange bias effect is an essential component of magnetic memory and spintronic devices. Whereas recent research has shown that anisotropies perpendicular to the device plane provide superior stability against thermal noise, it has…

We investigated electronic structure and magnetic anisotropy in the Fe/MgO interface of magnetic metal and dielectric insulator under the Cr layer of small electronegativity, by means of the first-principles density functional approach. The…

Materials Science · Physics 2017-08-09 Nurul Ikhsan , Tomosato Kanagawa , Indra Pardede , Masao Obata , Tatsuki Oda

We present a systematic study of the magnetic properties of L1$_0$ binary alloys FeNi, CoNi, MnAl and MnGa via two different density functional theory approaches. Our calculations show large magnetocrystalline anisotropies in the order…

Materials Science · Physics 2015-02-23 Alexander Edström , Jonathan Chico , Adam Jakobsson , Anders Bergman , Jan Rusz

We have explored, computationally and experimentally, the magnetic properties of \fecob{} alloys. Calculations provide a good agreement with experiment in terms of the saturation magnetization and the magnetocrystalline anisotropy energy…