Predicted 2D ferromagnetic Janus VSeTe monolayer with high Curie temperature, large valley polarization and magnetic crystal anisotropy

Nanoscale ◽  
2020 ◽  
Vol 12 (44) ◽  
pp. 22735-22742
Author(s):  
Zhaoyong Guan ◽  
Shuang Ni
Keyword(s):  
Curie Temperature ◽  
Ground State ◽  
High Curie Temperature ◽  
Valley Splitting ◽  
Crystal Anisotropy ◽  
Valley Polarization ◽  
Ferromagnetic Ground State ◽  
Plane Direction

VSeTe shows ferromagnetic ground state with high Curie temperature and obvious valley splitting, and its EA along in-plane direction.

Spin waves and their stability in metals

1966 ◽  
Vol 295 (1441) ◽  
pp. 182-191 ◽  
Keyword(s):  
Curie Temperature ◽  
Ground State ◽  
Effective Interaction ◽  
Wave Dispersion ◽  
Cubic Lattice ◽  
Factors Influencing ◽  
Simple Cubic ◽  
Simple Cubic Lattice ◽  
Ferromagnetic Ground State ◽  
The Stability

The experimental and theoretical situation regarding the coefficient D in the spin wave dispersion law for metals, h ω q = Dq 2 , is briefly reviewed. Particular attention is paid to the correlation of D with other magnetic properties of metals and alloys such as the Curie temperature. A calculation of D is then reported for a simple cubic lattice to illustrate the factors influencing D , such as the effective interaction between the itinerant electrons and the number of electrons per atom. The correlation of D with the Curie temperature is also obtained for this model. On the basis of these results as well as those of Penn (1966) a test is made of the stability of the ferromagnetic ground state by considering a phase diagram relating the reduced effective interaction with the number of electrons per atom. The stability or instability is discussed separately for the several regions in this diagram. As a result it is concluded that Penn’s analysis of this problem may be insufficient in some cases and it is conjectured that the stability of the ferromagnetic ground state is determined by the sign of D .

scholarly journals Electric field induced giant valley polarization in two dimensional ferromagnetic WSe2/CrSnSe3 heterostructure

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Imran Khan ◽  
Brahim Marfoua ◽  
Jisang Hong
Keyword(s):  
Electric Field ◽  
Valley Splitting ◽  
Field Dependency ◽  
Stacking Order ◽  
Plane Anisotropy ◽  
Out Of Plane ◽  
Valley Polarization ◽  
Ferromagnetic Ground State ◽  
Potential Structure ◽  
Stable Structures

AbstractValleytronics is receiving extensive research efforts. Thus, we investigated the electric field-induced valley polarization in the WSe2/CrSnSe3 heterostructures by varying the stacking order. The heterostructure shows indirect band gaps of 270 and 330 meV in the two most stable structures. The WSe2/CrSnSe3 heterostructure displays a ferromagnetic ground state with out-of-plane anisotropy (0.02 meV) in one stable stacking (S-1) while a small in-plane anisotropy (−0.01 meV) is found in other stacking (S-2). The Curie temperature is slightly enhanced to 73 K compared to the monolayer CrSnSe3. We have found the valley splitting of 4 meV in S-1 whereas it became 9 meV in the S-2 system. The valley splitting is further enhanced if an electric field is applied from CrSnSe3 to the WSe2 layer whereas it is suppressed in the reversed electric field. Particularly, the S-2 structure shows a giant valley splitting of 67 meV at an electric field of 0.6 V Å−1. We attribute this electric field-dependency to the dipolar effect. Overall, we propose that the WSe2/CrSnSe3 heterostructure can be a potential structure for obtaining a giant valley splitting.

NIMAG 105

Alloy Digest ◽  
1976 ◽  
Vol 25 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Curie Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
High Temperatures ◽  
Heat Treating ◽  
High Curie Temperature ◽  
Magnetostriction Coefficient

Abstract NIMAG 105 is a wrought nickel alloy with a high magnetostriction coefficient. It is easily formed or drawn, has a high Curie temperature and has low oxidation at high temperatures. It is recommended for electronic and electrical applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-228. Producer or source: Spang Industries Inc..

scholarly journals Enhancing the electrical properties of high-Curie temperature BNT–PZT piezoceramics by oxides-hydrothermal method

AIP Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 075119
Author(s):  
Bo Li ◽  
Fei Zhu ◽  
Deyi Zheng ◽  
Chi pang ◽  
Zihao Fei
Keyword(s):  
Electrical Properties ◽  
Curie Temperature ◽  
Hydrothermal Method ◽  
High Curie Temperature

scholarly journals Effects of alternating current poling on the dielectric and piezoelectric properties of Pb(In0.5Nb0.5)O3–PbTiO3 crystals with a high Curie temperature

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12826-12832
Author(s):  
Junjie Xiong ◽  
Zujian Wang ◽  
Xiaoming Yang ◽  
Rongbing Su ◽  
Xifa Long ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Piezoelectric Properties ◽  
Alternating Current ◽  
High Curie Temperature ◽  
Dielectric And Piezoelectric Properties

The ε33T/ε0 and d33 values of ACP 0.66PIN–0.34PT crystals are shown to be 3070 and 1400 pC N−1, respectively, which are 14% and 18% larger than those of a DCP sample, owing to the enhancement of both intrinsic and extrinsic contributions.

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