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In this work, we study the influence of the magnetic proximity effect (MPE) in Pt on the total magnetic moment of thin film trilayer systems consisting of the ferromagnet (FM) Co adjacent to the heavy metals (HMs) Pt and Ta. We investigate…

Using the fully-relativistic screened Korringa-Kohn-Rostoker method I study the orbital magnetism in the half-metallic Heusler alloys. Orbital moments are almost completely quenched and they are negligible with respect to the spin moments.…

材料科学 · 物理学 2009-11-10 I. Galanakis

Using first-principles calculations, we study the magnetic properties of a Co monolayer on a Pt(111) surface with a capping monolayer of selected $5d$ elements (Re, Os, Ir, Pt and Au). First we determine the tensorial exchange interactions…

材料科学 · 物理学 2018-04-18 E. Simon , L. Rózsa , K. Palotás , L. Szunyogh

Among magnetic thin films with perpendicular magnetic anisotropy (PMA), $L1_0$-ordered FePt has attracted significant attention because of its exceptionally strong PMA. However, the microscopic origin of its strong PMA has not been…

The occurence of spin-polarization at ZrO$_{2}$, Al$_{2}$O$_{3}$ and MgO surfaces is proved by means of \textit{ab-initio} calculations within the density functional theory. Large spin moments, as high as 1.56 $\mu_B$, develop at O-ended…

材料科学 · 物理学 2009-11-11 S. Gallego , J. I. Beltran , J. Cerda , M. C. Munoz

The orbital magnetic moment of a Co adatom on a Pt(111) surface is calculated in good agreement with experimental data making use of the LSDA+U method. It is shown that both electron correlation induced orbital polarization and structural…

材料科学 · 物理学 2009-11-13 Alexander B. Shick , Alexander I. Lichtenstein

The Fe electronic structure and magnetism in (i) monoclinic Ca$_2$FeReO$_6$ with a metal-insulator transition at $T_{MI} \sim 140$ K and (ii) quasi-cubic half-metallic Ba$_2$FeReO$_6$ ceramic double perovskites are probed by soft x-ray…

强关联电子 · 物理学 2019-05-14 E. Granado , J. C. Cezar , C. Azimonte , J. Gopalakrishnan , K. Ramesha

We report on the magnetic properties of Fe and Co adatoms on a Cu$_{2}$N/Cu(100)-$c(2 \times 2)$ surface investigated by x-ray magnetic dichroism measurements and density functional theory (DFT) calculations including the local coulomb…

By using ab initio methods on different levels we study the magnetic ground state of (finite) atomic wires deposited on metallic surfaces. A phenomenological model based on symmetry arguments suggests that the magnetization of a…

材料科学 · 物理学 2009-11-10 B. Lazarovits , B. Ujfalussy , L. Szunyogh , G. M. Stocks , P. Weinberger

Using quantum mechanical perturbation theory (PT) we analyze how the energy of perturbation of different orders is renormalized in solids. We test the validity of PT analysis by considering a specific case of spin-orbit coupling as a…

材料科学 · 物理学 2014-07-11 Vladimir Antropov , Liqin Ke , Daniel Åberg

We present the magnetization energy and magnetic moments of 3d monowires aligned along the step edges of Pt (533) and (322) vicinal substrates. We employ an electronic structure method which scales linearly with the size of the system. This…

材料科学 · 物理学 2007-05-23 Sam Shallcross , Igor Abrikosov , Velimir Meded

We present a first-principles study of the surface magnetism induced by Cr, Mn, Fe and Co adatoms on the (111) surfaces of Rh, Pd, Ag, Ir, Pt and Au. We first describe how the different contributions to the surface magnetism enter the…

介观与纳米尺度物理 · 物理学 2020-02-19 Sascha Brinker , Manuel dos Santos Dias , Samir Lounis

The spin gauge field formalism has been used to explain the emergence of out of plane spin accumulation in two-dimensional spin orbit interaction (SOI) systems in the presence of an in-plane electric field. The adiabatic alignment of the…

介观与纳米尺度物理 · 物理学 2017-01-02 Zhuo Bin Siu , Mansoor B. A. Jalil , Seng Ghee Tan

Two-dimensional materials and their heterostructures have opened up new possibilities for magnetism at the nanoscale. In this study, we utilize first-principles simulations to investigate the structural, electronic, and magnetic properties…

材料科学 · 物理学 2022-10-11 Diem Thi-Xuan Dang , Ranjan Kumar Barik , Manh-Huong Phan , Lilia M. Woods

The nature of low-impurity ferromagnetism remains a challenging problem in the solid-state community due to the strong dependence of magnetic properties on composition, concentration, and structural geometry of diluted alloys. To address…

We have used spin-polarized scanning tunneling spectroscopy to observe the spin-polarization state of individual Fe and Cr atoms adsorbed onto Co nanoislands. Both of these magnetic adatoms exhibit stationary out-of-plane spin-polarization…

材料科学 · 物理学 2009-11-13 Y. Yayon , V. W. Brar , L. Senapati , S. C. Erwin , M. F. Crommie

We employ the density functional Kohn-Sham method in the local spin-density approximation to study the electronic structure and magnetism of quasi one-dimensional periodic arrays of few-electron quantum dots. At small values of the lattice…

介观与纳米尺度物理 · 物理学 2015-06-25 K. Karkkainen , M. Koskinen , S. M. Reimann , M. Manninen

With density functional theory, studied are the local magnetic moments in Fe-Al alloys depending on concentration and Fe nearest environment. At zero temperature, the system can be in different states: ferromagnetic, antiferromagnetic and…

材料科学 · 物理学 2009-11-13 A. K. Arzhnikov , L. V. Dobysheva , M. A. Timirgazin

Ultra-thin Pt films grown on insulating ferrimagnetic CoFe2O4 (111) epitaxial films display a magnetoresistance upon rotating the magnetization of the magnetic layer. We report here X-ray magnetic circular dichroism (XMCD) recorded at…

In experiments and applications usually the spin magnetic moment of magnons is considered. In this Paper we identify an additional degree of freedom of magnons: an \emph{orbital} magnetic moment brought about by spin-orbit coupling.Our…

强关联电子 · 物理学 2020-09-16 Robin R. Neumann , Alexander Mook , Jürgen Henk , Ingrid Mertig