High temperature spin-polarized semiconductivity with zero magnetization in two-dimensional Janus MXenes

2016 ◽  
Vol 4 (27) ◽  
pp. 6500-6509 ◽  
Author(s):  
Junjie He ◽  
Pengbo Lyu ◽  
L. Z. Sun ◽  
Ángel Morales García ◽  
Petr Nachtigall
Keyword(s):  
High Temperature ◽  
Spin Polarization ◽  
High Spin ◽  
Room Temperature ◽  
Magnetic Order ◽  
2D Materials ◽  
Two Dimensional ◽  
Next Generation ◽  
Spin Polarized ◽  
High Spin Polarization

Searching for two-dimensional (2D) materials with room-temperature magnetic order and high spin-polarization is essential for the development of next-generation nanospintronic devices.

High Spin Polarization of Conduction Band Electrons in GaAs-GaAsP Strained Layer Superlattice Fabricated as a Spin-Polarized Electron Source

2004 ◽  
Vol 43 (6A) ◽  
pp. 3371-3375 ◽  
Author(s):  
Tetsuya Matsuyama ◽  
Hisaya Takikita ◽  
Hiromichi Horinaka ◽  
Kenji Wada ◽  
Tsutomu Nakanishi ◽  
...  
Keyword(s):  
Conduction Band ◽  
Spin Polarization ◽  
High Spin ◽  
Electron Source ◽  
Strained Layer ◽  
Spin Polarized ◽  
High Spin Polarization ◽  
Strained Layer Superlattice

Enhanced tunneling magnetoresistance and high-spin polarization at room temperature in a polystyrene-coatedFe3O4granular system

2006 ◽  
Vol 73 (13) ◽  
Author(s):  
Wendong Wang ◽  
Minhui Yu ◽  
Matthias Batzill ◽  
Jibao He ◽  
Ulrike Diebold ◽  
...  
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Room Temperature ◽  
Tunneling Magnetoresistance ◽  
High Spin Polarization

scholarly journals Room-temperature observation of high-spin polarization of epitaxial CrO2(100) island films at the Fermi energy

2002 ◽  
Vol 80 (22) ◽  
pp. 4181-4183 ◽  
Author(s):  
Yu. S. Dedkov ◽  
M. Fonine ◽  
C. König ◽  
U. Rüdiger ◽  
G. Güntherodt ◽  
...  
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Fermi Energy ◽  
Room Temperature ◽  
Temperature Observation ◽  
High Spin Polarization ◽  
Island Films

scholarly journals Room temperature near unity spin polarization in 2D Van der Waals heterostructures

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Danliang Zhang ◽  
Ying Liu ◽  
Mai He ◽  
Ao Zhang ◽  
Shula Chen ◽  
...  
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Room Temperature ◽  
Carrier Lifetime ◽  
Van Der Waals ◽  
Degree Of Polarization ◽  
Excitation Wavelength ◽  
Type I ◽  
Valley Polarization ◽  
High Spin Polarization

Abstract The generation and manipulation of spin polarization at room temperature are essential for 2D van der Waals (vdW) materials-based spin-photonic and spintronic applications. However, most of the high degree polarization is achieved at cryogenic temperatures, where the spin-valley polarization lifetime is increased. Here, we report on room temperature high-spin polarization in 2D layers by reducing its carrier lifetime via the construction of vdW heterostructures. A near unity degree of polarization is observed in PbI2 layers with the formation of type-I and type-II band aligned vdW heterostructures with monolayer WS2 and WSe2. We demonstrate that the spin polarization is related to the carrier lifetime and can be manipulated by the layer thickness, temperature, and excitation wavelength. We further elucidate the carrier dynamics and measure the polarization lifetime in these heterostructures. Our work provides a promising approach to achieve room temperature high-spin polarizations, which contribute to spin-photonics applications.

Using an iron overlayer to enhance contrast in SEMPA

1990 ◽  
Vol 48 (4) ◽  
pp. 766-767
Author(s):  
R. Browning ◽  
T. VanZandt ◽  
M. Landolt
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Secondary Electron ◽  
Electron Spin Polarization ◽  
Sufficient Information ◽  
Recording Industry ◽  
Secondary Electrons ◽  
Spin Polarized ◽  
Surface Magnetization ◽  
High Spin Polarization

Secondary electron microscopy with polarization analysis (SEMPA), uses the spin polarization of the low energy secondary electrons to image the surface magnetization of a magnetic sample. However, many systems of interest to the magnetic recording industry have a low secondary electron spin polarization. This is because, either the material’s magnetization is low, or because surface treatments have reduced the spin polarization. The low spin polarized contrast from these samples means that detailed study of the characteristics of a recorded field is very time consuming. Typically tens of minutes are needed to collect a single image that may cover a very small part of a sample. As a result, it is difficult to provide sufficient information over the range of length scales needed to characterize the magnetic distribution.One method by which the problem of low spin polarized contrast may be overcome, is to use an overlayer with a high spin polarization. This film must be thin, and magnetically soft to minimize any change in the sample’s magnetization. Pure Fe films appear suitable, and high spin polarized contrast can be observed in nanometer thick fims of Fe.

High spin polarization at room temperature in Ge-substituted Fe3O4epitaxial thin film grown under high oxygen pressure

2013 ◽  
Vol 103 (21) ◽  
pp. 212404 ◽  
Author(s):  
Munetoshi Seki ◽  
Masanao Takahashi ◽  
Toshiyuki Ohshima ◽  
Hiroyasu Yamahara ◽  
Hitoshi Tabata
Keyword(s):  
Thin Film ◽  
Spin Polarization ◽  
High Spin ◽  
Oxygen Pressure ◽  
Room Temperature ◽  
High Oxygen ◽  
High Oxygen Pressure ◽  
High Spin Polarization

Nodal-Loop Half Metallicity in Two-Dimensional Fe4N2 Pentagon Crystal with Room-Temperature Ferromagnetism

Nanoscale ◽  
2021 ◽  
Author(s):  
Kai Zhang ◽  
Minglong Chen ◽  
Dayong Wang ◽  
Haifeng Lv ◽  
Xiaojun Wu ◽  
...  
Keyword(s):  
High Speed ◽  
Room Temperature ◽  
2D Materials ◽  
Room Temperature Ferromagnetism ◽  
Two Dimensional ◽  
Half Metallicity ◽  
Spintronic Devices ◽  
Low Dissipation ◽  
Spin Polarized ◽  
Band Crossing

Two-dimensional (2D) materials with fully spin-polarized nodal-loop band crossing are a class of topological magnetic materials, holding promise for high-speed low-dissipation spintronic devices. Recently, several 2D nodal-loop materials have been...

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