scholarly journals Strain-tunable magnetic anisotropy in two-dimensional Dirac half-metals: nickel trihalides

RSC Advances ◽  
2019 ◽  
Vol 9 (61) ◽  
pp. 35614-35623 ◽  
Author(s):  
Zheng Li ◽  
Baozeng Zhou ◽  
Chongbiao Luan
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Polarization ◽  
High Speed ◽  
Ferromagnetic State ◽  
Two Dimensional ◽  
Half Metals ◽  
Conduction Electrons

Combining complete spin-polarization, high-speed conduction electrons, high TC, robust ferromagnetic state and strain-tunable magnetic anisotropy in the monolayer NiX3.

A polarization propagation mechanism of Fe and Cu atoms co-doped in two-dimensional-Si3N4

2020 ◽  
Vol 44 (33) ◽  
pp. 14082-14086
Author(s):  
Weili Li ◽  
Zhengxin Yan ◽  
Xiaowei Zhai ◽  
Li Chen ◽  
Wei Liu ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Polarization ◽  
Propagation Mechanism ◽  
Two Dimensional ◽  
Honeycomb Structures ◽  
Co Doped

Fe and Cu atoms doped into two dimensional (2D) Si3N4 honeycomb structures exhibit magnetic anisotropy, and planar spin-polarization propagation.

Spin polarization in magnets

2017 ◽  
Author(s):  
K. Takanashi ◽  
Y. Sakuraba
Keyword(s):  
Spin Polarization ◽  
Spin Current ◽  
Spin Transfer Torque ◽  
Spin Transfer ◽  
Energy Band Gap ◽  
Magnetoresistance Effect ◽  
Half Metals ◽  
Conduction Electrons ◽  
Spin Polarized ◽  
Spin Dependent Scattering

This chapter explains how the exchange splitting between up- and down-spin bands in ferromagnets unexceptionally generates spin-polarized electronic states at the Fermi energy. The quantity of spin polarization P in ferromagnets is one of the important parameters for application in spintronics, since a ferromagnet having a higher P is able to generate larger various spin-dependent effects such as the magnetoresistance effect, spin transfer torque, spin accumulation, and so on. However, the spin polarizations of general 3d transition metals or alloys generally limit the size of spin-dependent effects. Thus,“‘half-metals” attract much interest as an ideal source of spin current and spin-dependent scattering because they possess perfectly spin-polarized conduction electrons due to the energy band gap in either the up- or down-spin channel at the Fermi level.

Magnetic two-dimensional C3N2 carbonitrides: semiconductors, metals and half-metals

2017 ◽  
Vol 19 (39) ◽  
pp. 26743-26748 ◽  
Author(s):  
Dimitrios Mpoutas ◽  
Leonidas Tsetseris
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Spin Polarization ◽  
Density Functional ◽  
Two Dimensional ◽  
Functional Theory ◽  
Half Metals ◽  
2D Polymers

Using density-functional theory (DFT) calculations we probe the spin polarization of functionalized two-dimensional (2D) phthalo-carbonitrides (pc-C3N2), i.e., 2D polymers of tetra-cyanoethylene.

scholarly journals 1T-CrO2 Monolayer: A High-Temperature Dirac Half-Metal for High-Speed Spintronics

2021 ◽  
Author(s):  
Shenda He ◽  
Pan Zhou ◽  
Yi Yang ◽  
Wei Wang ◽  
Lizhong Sun
Keyword(s):  
High Temperature ◽  
Ground State ◽  
First Principles ◽  
High Speed ◽  
2D Materials ◽  
Two Dimensional ◽  
First Principles Calculations ◽  
Conduction Electrons ◽  
Half Metal ◽  
Ferromagnetic Ground State

Two-dimensional (2D) materials with complete spin-polarization, high-speed conduction electrons, large Curie temperature, and robust ferromagnetic ground state are desirable for spintronic applications. Based on first-principles calculations, we demonstrate that the...

Load Spectrum Compiling and Fatigue Life Estimation of the Automobile Wheel Hub

2020 ◽  
Vol 13 ◽  
Author(s):  
Xintian Liu ◽  
Yang Qu ◽  
Xiaobing Yang ◽  
Yongfeng Shen
Keyword(s):  
Fatigue Life ◽  
High Speed ◽  
Two Dimensional ◽  
Load Spectrum ◽  
One Dimensional ◽  
Life Estimation ◽  
Load Spectra ◽  
Fatigue Life Estimation ◽  
Program Load Spectrum ◽  
Program Load

Background:: In the process of high-speed driving, the wheel hub is constantly subjected to the impact load from the ground. Therefore, it is important to estimate the fatigue life of the hub in the design and production process. Objective:: This paper introduces a method to study the fatigue life of car hub based on the road load collected from test site. Methods:: Based on interval analysis, the distribution characteristics of load spectrum are analyzed. The fatigue life estimation of one - dimensional and two - dimensional load spectra is compared by compiling load spectra. Results:: According to the S-N curve cluster and the one-dimensional program load spectrum, the estimated range fatigue life of the hub is 397,100 km to 529,700 km. For unsymmetrical cyclic loading, each level means and amplitude of load were obtained through the Goodman fatigue empirical formula, and then according to S-N curve clusters in the upper and lower curves and two-dimensional program load spectrum, estimates the fatigue life of wheel hub of the interval is 329900 km to 435200 km, than one-dimensional load spectrum fatigue life was reduced by 16.9% - 17.8%. Conclusion:: This paper lays a foundation for the prediction of fatigue life and the bench test of fatigue durability of auto parts subjected to complex and variable random loads. At the same time, the research method can also be used to estimate the fatigue life of other bearing parts or high-speed moving parts and assemblies.

Accelerating laser processes with a smart two-dimensional polygon mirror scanner for ultra-fast beam deflection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Florian Roessler ◽  
André Streek
Keyword(s):  
Energy Distribution ◽  
Real Time ◽  
Laser Processing ◽  
High Speed ◽  
Beam Deflection ◽  
Two Dimensional ◽  
Heat Accumulation ◽  
Field Programmable ◽  
Drill Holes ◽  
Average Laser

Abstract In laser processing, the possible throughput is directly scaling with the available average laser power. To avoid unwanted thermal damage due to high pulse energy or heat accumulation during MHz-repetition rates, energy distribution over the workpiece is required. Polygon mirror scanners enable high deflection speeds and thus, a proper energy distribution within a short processing time. The requirements of laser micro processing with up to 10 kW average laser powers and high scan speeds up to 1000 m/s result in a 30 mm aperture two-dimensional polygon mirror scanner with a patented low-distortion mirror configuration. In combination with a field programmable gate array-based real-time logic, position-true high-accuracy laser switching is enabled for 2D, 2.5D, or 3D laser processing capable to drill holes in multi-pass ablation or engraving. A special developed real-time shifter module within the high-speed logic allows, in combination with external axis, the material processing on the fly and hence, processing of workpieces much larger than the scan field.

2D Nonlayered Ferromagnetic VO2(M) Nanosheets Induced by the Strain Engineering of CO2

2021 ◽  
Author(s):  
Li Zhang ◽  
Yannan Zhou ◽  
Xiaoli Zheng ◽  
Jingyun Jiang ◽  
Qun Xu
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Polarization ◽  
Strain Engineering ◽  
The Family ◽  
Curie Temperatures ◽  
Large Spin

2D nonlayered ferromagnets possessing high Curie temperatures, sizable magnetic anisotropy, and large spin polarization are emerging as promising candidates for the family of 2D ferromagnetic. While the difficulties in synthesis...

An Efficient Match Search Approach Using Two-Dimensional Hash Function in Hardware-Based Dictionary Compression

2019 ◽  
Vol 28 (06) ◽  
pp. 1950106
Author(s):  
Qian Dong ◽  
Bing Li
Keyword(s):  
Compression Ratio ◽  
Hash Function ◽  
High Speed ◽  
Two Dimensional ◽  
Time Data ◽  
Search Result ◽  
Compression Speed ◽  
Real Time Data ◽  
Real Time Data Processing ◽  
Search Approach

The hardware-based dictionary compression is widely adopted for high speed requirement of real-time data processing. Hash function helps to manage large dictionary to improve compression ratio but is prone to collisions, so some phrases in match search result are not true matches. This paper presents a novel match search approach called dual chaining hash refining, which can improve the efficiency of match search. From the experimental results, our method showed obvious advantage in compression speed compared with other approach that utilizes single hash function described in the previous publications.

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