Study of Ru2VGe and Ru2VSb: High-spin polarized and half-metallic Heusler alloys

2015 ◽  
Author(s):  
Idris Hamid Bhat ◽  
Dinesh C. Gupta
Keyword(s):  
High Spin ◽  
Heusler Alloys ◽  
Half Metallic ◽  
Spin Polarized

scholarly journals Tunnel magnetoresistance effect and magnetic damping in half-metallic Heusler alloys

2011 ◽  
Vol 369 (1948) ◽  
pp. 3037-3053 ◽  
Author(s):  
M. Oogane ◽  
S. Mizukami
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Heusler Alloy ◽  
Heusler Alloys ◽  
Magnetoresistance Effect ◽  
Half Metallicity ◽  
Half Metallic ◽  
Tunnel Magnetoresistance ◽  
Magnetic Damping ◽  
High Spin Polarization

Some full-Heusler alloys, such as Co 2 MnSi and Co 2 MnGe, are expected to be half-metallic ferromagnetic material, which has complete spin polarization. They are the most promising materials for realizing half-metallicity at room temperature owing to their high Curie temperature. We demonstrate a huge tunnel magnetoresistance effect in a magnetic tunnel junction using a Co 2 MnSi Heusler alloy electrode. This result proves high spin polarization of the Heusler alloy. We also demonstrate a small magnetic damping constant in Co 2 FeAl epitaxial film. The very high spin polarization and small magnetic constant of Heusler alloys will be a great advantage for future spintronic device applications.

Epitaxial Heusler Alloys: New Materials for Semiconductor Spintronics

MRS Bulletin ◽  
2003 ◽  
Vol 28 (10) ◽  
pp. 725-728 ◽  
Author(s):  
Chris Palmstrøm
Keyword(s):  
Crystal Structures ◽  
High Spin ◽  
Heusler Alloys ◽  
Compound Semiconductors ◽  
Great Promise ◽  
Lattice Matching ◽  
Spin Polarized ◽  
Semiconductor Spintronics ◽  
High Spin Polarization ◽  
Curie Temperatures

AbstractFerromagnetic materials that have Curie temperatures above room temperature, crystal structures and lattice matching compatible with compound semiconductors, and high spin polarizations show great promise for integration with semiconductor spintronics. Heusler alloys have crystal structures (fcc) and lattice parameters similar to many compound semiconductors, high spin polarization at the Fermi level, and high Curie temperatures. These properties make them particularly attractive for injectors and detectors of spin-polarized currents. This review discusses the progress and issues related to integrating full and half Heusler alloys into ferromagnetic compound semiconductor heterostructures.

scholarly journals High spin mixing conductance and spin interface transparency at the interface of a Co2Fe0.4Mn0.6Si Heusler alloy and Pt

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Braj Bhusan Singh ◽  
Koustuv Roy ◽  
Pushpendra Gupta ◽  
Takeshi Seki ◽  
Koki Takanashi ◽  
...  
Keyword(s):  
High Spin ◽  
Heusler Alloys ◽  
Hall Voltage ◽  
Spin Pumping ◽  
Magnetic Damping ◽  
Spin Polarized ◽  
Inverse Spin Hall Effect ◽  
Interface Transparency ◽  
Full Heusler ◽  
Full Heusler Alloys

AbstractFerromagnetic materials exhibiting low magnetic damping (α) and moderately high-saturation magnetization are required from the viewpoints of generation, transmission, and detection of spin waves. Since spin-to-charge conversion efficiency is another important parameter, high spin mixing conductance $$({g_{r}^{\uparrow \downarrow}})$$ ( g r ↑ ↓ ) is the key for efficient spin-to-charge conversion. Full Heusler alloys, e.g., Co2Fe0.4Mn0.6Si (CFMS), which are predicted to be 100% spin-polarized, exhibit low α. However, $$g_r^{ \uparrow \downarrow }$$ g r ↑ ↓ at the interface between CFMS and a paramagnet is not fully understood. Here, we report investigations of spin pumping and the inverse spin Hall effect in CFMS/Pt bilayers. Damping analysis indicates the presence of significant spin pumping at the interface of CFMS and Pt, which is also confirmed by the detection of an inverse spin Hall voltage. We show that in CFMS/Pt, $$g_r^{ \uparrow \downarrow }$$ g r ↑ ↓ (1.70 × 1020 m−2) and the interface transparency (83%) are higher than the values reported for other ferromagnetic/heavy metal systems. We observed a spin Hall angle of ~0.026 for the CFMS/Pt bilayer system.

Possible half-metallic behavior of Co2−xCrxFeGe Heusler alloys: Theory and experiment

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
R. Mahat ◽  
S. KC ◽  
U. Karki ◽  
J. Y. Law ◽  
V. Franco ◽  
...  
Keyword(s):  
Heusler Alloys ◽  
Metallic Behavior ◽  
Half Metallic ◽  
Theory And Experiment

scholarly journals The effect of pressure and alloying on half-metallicity of quaternary Heusler compounds CoMnYZ (Z = Al, Ga, and In)

2016 ◽  
Vol 34 (4) ◽  
pp. 905-915 ◽  
Author(s):  
M. Rahmoune ◽  
A. Chahed ◽  
A. Amar ◽  
H. Rozale ◽  
A. Lakdja ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Density Functional ◽  
Heusler Alloys ◽  
Band Gaps ◽  
Ferromagnetic Behavior ◽  
Full Potential ◽  
Energy Bands ◽  
Half Metallicity ◽  
Half Metallic ◽  
Electronic And Magnetic Properties

AbstractIn this work, first-principles calculations of the structural, electronic and magnetic properties of Heusler alloys CoMnYAl, CoMnYGa and CoMnYIn are presented. The full potential linearized augmented plane waves (FP-LAPW) method based on the density functional theory (DFT) has been applied. The structural results showed that CoMnYZ (Z = Al, Ga, In) compounds in the stable structure of type 1+FM were true half-metallic (HM) ferromagnets. The minority (half-metallic) band gaps were found to be 0.51 (0.158), 0.59 (0.294), and 0.54 (0.195) eV for Z = Al, Ga, and In, respectively. The characteristics of energy bands and origin of minority band gaps were also studied. In addition, the effect of volumetric and tetragonal strain on HM character was studied. We also investigated the structural, electronic and magnetic properties of the doped Heusler alloys CoMnYGa1−xAlx, CoMnYAl1−xInx and CoMnYGa1−xInx (x = 0, 0.25, 0.5, 0.75, 1). The composition dependence of the lattice parameters obeys Vegard’s law. All alloy compositions exhibit HM ferromagnetic behavior with a high Curie temperature (TC).

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
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