scholarly journals Robust dynamics of antiferromagnetic skyrmion driven by spin-polarized current in small thin disks

2020 ◽  
Vol 128 (16) ◽  
pp. 163902
Author(s):  
R. L. Silva ◽  
R. C. Silva ◽  
A. R. Pereira ◽  
W. A. Moura-Melo
Keyword(s):  
Spin Polarized ◽  
Thin Disks

Antiferromagnetic-vortex dynamics driven by spin-polarized current in small thin disks

2020 ◽  
Vol 384 (18) ◽  
pp. 126376 ◽  
Author(s):  
R.J.C. Lopes ◽  
R.C. Silva ◽  
R.L. Silva ◽  
W.A. Moura-Melo ◽  
A.R. Pereira
Keyword(s):  
Vortex Dynamics ◽  
Spin Polarized ◽  
Thin Disks

Spin-polarized Scanning Electron Microscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 768-769
Author(s):  
Kazuyuki Koike ◽  
Hideo Matsuyama
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Speed ◽  
Magnetic Thin Films ◽  
Electron Spin Polarization ◽  
Acquisition Time ◽  
Magnetization Direction ◽  
Spin Polarized ◽  
Conventional Methods ◽  
Scanning Electron

Spin-polarized scanning electron microscopy (spin SEM), where the secondary electron spin polarization is used as the image signal, is a novel technique for magnetic domain observation. Since its first development by Koike and Hayakawa in 1984, several laboratories have extensively studied this technique and have greatly improved its capability for data extraction and its range of applications. This paper reviews the progress over the last few years.Almost all the high expectations initially held for spin SEM have been realized. A spatial resolution of several hundreds angstroms has been attained, which is nearly one order of magnitude higher than that of conventional methods for thick samples. Quantitative analysis of magnetization direction has been performed more easily than with conventional methods. Domain observation of the surface of three-dimensional samples has been confirmed to be possible. One of the drawbacks, a long image acquisition time, has been eased by combining highspeed image-signal processing with high speed scanning, although at the cost of image quality. By using spin SEM, the magnetic structure of a 180 degrees surface Neel wall, magnetic thin films, multilayered films, magnetic discs, etc., have been investigated.

Investigation of spin-polarized carrier injection effect in|YBa2Cu3O7/SrTiO3/La0.67/Sr0.33MnO3 and YBa2Cu3O7/La0.67Sr0.33MnO3 heterostructures

2001 ◽  
Vol 11 (PR11) ◽  
pp. Pr11-53-Pr11-57
Author(s):  
B. Vengalis ◽  
V. Plausinaitiene ◽  
A. Abrutis ◽  
Z. Saltyte ◽  
R. Butkute ◽  
...  
Keyword(s):  
Carrier Injection ◽  
Spin Polarized ◽  
Injection Effect

OPTICAL TRANSITIONS BETWEEN SPIN-POLARIZED BANDS IN MAGNETIC CHROMIUM SPINELS

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-932-C1-933 ◽  
Author(s):  
H. W. LEHMANN ◽  
G. HARBEKE ◽  
H. PINCH
Keyword(s):  
Optical Transitions ◽  
Spin Polarized

SURFACE AND THIN FILM MAGNETISM WITH SPIN POLARIZED ELECTRONS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-9-C8-16 ◽  
Author(s):  
H. C. Siegmann ◽  
D. Mauri ◽  
D. Scholl ◽  
E. Kay
Keyword(s):  
Thin Film ◽  
Polarized Electrons ◽  
Spin Polarized ◽  
Thin Film Magnetism

Analysis of Spin-Polarized Current Using InSb/AlInSb Resonant Tunneling Diode

2012 ◽  
Vol E95.C (5) ◽  
pp. 871-878
Author(s):  
Masanari FUJITA ◽  
Mitsufumi SAITO ◽  
Michihiko SUHARA
Keyword(s):  
Resonant Tunneling ◽  
Resonant Tunneling Diode ◽  
Tunneling Diode ◽  
Spin Polarized

Quantum-chemical analysis of small silver clusters

1987 ◽  
Vol 52 (7) ◽  
pp. 1652-1657 ◽  
Author(s):  
Grigorii V. Gadiyak ◽  
Yurii N. Morokov ◽  
Mojmír Tomášek
Keyword(s):  
Hard Spheres ◽  
Electronic Configuration ◽  
Close Packing ◽  
Basis Sets ◽  
Silver Clusters ◽  
Quantum Chemical Analysis ◽  
Spin Distribution ◽  
Spin Polarized ◽  
Atomic Silver ◽  
Equilibrium Geometries

Total energy calculations of three- and four-atomic silver clusters have been performed by the spin-polarized version of the CNDO/2 method to get the most stable equilibrium geometries, atomization energies, and charge and spin distribution on the atoms for three different basis sets: {s}, {sp}, and {spd}. When viewed from the equilateral triangle and square geometries, the last electronic configuration, i.e. the {spd} one, appears to be most stable with respect to the geometrical deformations considered. In this case, the behaviour of the atoms of both clusters resembles that of hard spheres (i.e. close-packing).

scholarly journals The impact of metallic contacts on spin-polarized photocurrents in topological insulator Bi 2 Se 3 nanowires

2020 ◽  
Vol 117 (26) ◽  
pp. 262401
Author(s):  
N. Meyer ◽  
K. Geishendorf ◽  
J. Walowski ◽  
A. Thomas ◽  
M. Münzenberg
Keyword(s):  
Topological Insulator ◽  
Metallic Contacts ◽  
Spin Polarized ◽  
The Impact

scholarly journals Geometric particle-in-cell methods for the Vlasov–Maxwell equations with spin effects

2021 ◽  
Vol 87 (3) ◽  
Author(s):  
Nicolas Crouseilles ◽  
Paul-Antoine Hervieux ◽  
Yingzhe Li ◽  
Giovanni Manfredi ◽  
Yajuan Sun
Keyword(s):  
Phase Space ◽  
Maxwell Equations ◽  
Stimulated Raman Scattering ◽  
Extended Phase ◽  
Five Dimensions ◽  
Particle In Cell ◽  
Spin Effects ◽  
Dimensional Phase Space ◽  
Spin Polarized ◽  
Underdense Plasma

We propose a numerical scheme to solve the semiclassical Vlasov–Maxwell equations for electrons with spin. The electron gas is described by a distribution function $f(t,{\boldsymbol x},{{{\boldsymbol p}}}, {\boldsymbol s})$ that evolves in an extended 9-dimensional phase space $({\boldsymbol x},{{{\boldsymbol p}}}, {\boldsymbol s})$ , where $\boldsymbol s$ represents the spin vector. Using suitable approximations and symmetries, the extended phase space can be reduced to five dimensions: $(x,{{p_x}}, {\boldsymbol s})$ . It can be shown that the spin Vlasov–Maxwell equations enjoy a Hamiltonian structure that motivates the use of the recently developed geometric particle-in-cell (PIC) methods. Here, the geometric PIC approach is generalized to the case of electrons with spin. Total energy conservation is very well satisfied, with a relative error below $0.05\,\%$ . As a relevant example, we study the stimulated Raman scattering of an electromagnetic wave interacting with an underdense plasma, where the electrons are partially or fully spin polarized. It is shown that the Raman instability is very effective in destroying the electron polarization.

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