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.

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.

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...

Probing Magnetic Anisotropy and Spin Polarization in Spintronic Materials

2005 ◽  
Vol 4 (1) ◽  
pp. 59-64 ◽  
Author(s):  
P. Poddar ◽  
G.T. Woods ◽  
S. Srinath ◽  
H. Srikanth
Keyword(s):  
Magnetic Anisotropy ◽  
Spin Polarization

Magnetic anisotropy in nanocrystalline Co-doped ZnO thin films

2010 ◽  
Vol 487 (1-3) ◽  
pp. 97-100 ◽  
Author(s):  
M. Subramanian ◽  
M. Tanemura ◽  
T. Hihara ◽  
V. Ganesan ◽  
T. Soga ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Zno Thin Films ◽  
Doped Zno ◽  
Co Doped

Effects on the magnetic and optical properties of Co-doped ZnO at different electronic states

2017 ◽  
Vol 31 (31) ◽  
pp. 1750247
Author(s):  
Qingyu Huo ◽  
Zhenchao Xu ◽  
Linfeng Qu
Keyword(s):  
Absorption Spectrum ◽  
Spin Polarization ◽  
Electron Spin ◽  
Magnetic Moments ◽  
The State ◽  
Band Gaps ◽  
Electron Spin Polarization ◽  
Approximation Formula ◽  
Doped Zno ◽  
Co Doped

Both blue and red shifts in the absorption spectrum of Co-doped ZnO have been reported at a similar concentration range of doped Co. Moreover, the sources of magnetism of Co-doped ZnO are controversial. To solve these problems, the geometry optimization and energy of different Co-doped ZnO systems were calculated at the states of electron spin polarization and nonspin polarization by adopting plane-wave ultra-soft pseudopotential technology based on density function theory. At the state of electron nonspin polarization, the total energies increased as the concentration of Co-doped increased. The doped systems also became unstable. The formation energies increased and doping became difficult. Furthermore, the band gaps widened and the absorption spectrum exhibited a blue shift. The band gaps were corrected by local-density approximation + [Formula: see text] at the state of electron spin polarization. The magnetic moments of the doped systems weakened as the concentration of doped Co increased. The magnetic moments were derived from the coupling effects of [Formula: see text]–[Formula: see text]. The band gaps narrowed and the absorption spectrum exhibited a red shift. The inconsistencies of the band gaps and absorption spectrum at the states of electron spin polarization and nonspin polarization were first discovered in this research, and the sources of Co-doped ZnO magnetism were also reinterpreted.

RESONANT SPIN POLARIZATION IN A TWO-DIMENSIONAL HOLE GAS

2011 ◽  
Vol 25 (15) ◽  
pp. 1259-1270
Author(s):  
TIANXING MA
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Spin Polarization ◽  
Zeeman Splitting ◽  
Resonant Peak ◽  
Two Dimensional ◽  
Structural Inversion ◽  
Inversion Asymmetry ◽  
Peak Increase ◽  
Luttinger Hamiltonian

Within the Luttinger Hamiltonian, electric-field-induced resonant spin polarization of a two-dimensional hole gas in a perpendicular magnetic field was studied. The spin polarization arising from splitting between the light and the heavy hole bands shows a resonant peak at a certain magnetic field. Especially, the competition between the Luttinger term and the structural inversion asymmetry leads to a rich resonant peaks structure, and the required magnetic field for the resonance may be effectively reduced by enlarging the effective width of the quantum well. Furthermore, the Zeeman splitting tends to move the resonant spin polarization to a relative high magnetic field and destroy these rich resonant spin phenomena. Finally, both the height and the weight of the resonant peak increase as the temperature decreases. It is believed that such resonant spin phenomena may be verified in the sample of a two-dimensional hole gas, and it may provide an efficient way to control spin polarization by an external electric field.

Large four-fold magnetic anisotropy in two-dimensional modulated Ni80Fe20 films

2015 ◽  
Vol 107 (23) ◽  
pp. 232402 ◽  
Author(s):  
G. N. Kakazei ◽  
X. M. Liu ◽  
J. Ding ◽  
V. O. Golub ◽  
O. Y. Salyuk ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Two Dimensional
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