scholarly journals Electronic, magnetic and galvanomagnetic properties of Co-based Heusler alloys: Possible states of a half-metallic ferromagnet and spin gapless semiconductor

AIP Advances ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 015139
Author(s):  
A. A. Semiannikova ◽  
Yu. A. Perevozchikova ◽  
V. Yu Irkhin ◽  
E. B. Marchenkova ◽  
P. S. Korenistov ◽  
...  
Keyword(s):  
Heusler Alloys ◽  
Half Metallic ◽  
Galvanomagnetic Properties ◽  
Metallic Ferromagnet

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).

Study of Co2MnAl Heusler alloy as half metallic ferromagnet

2010 ◽  
Vol 84 (6) ◽  
pp. 717-721 ◽  
Author(s):  
Dibya Prakash Rai ◽  
Javad Hashemifar ◽  
Morteeza Jamal ◽  
Lalmuanpuia ◽  
M. P. Ghimire ◽  
...  
Keyword(s):  
Heusler Alloy ◽  
Half Metallic ◽  
Metallic Ferromagnet

The effect of lanthanide impurities on the physical properties of half-metallic ferromagnet Co2MnSi

2008 ◽  
Vol 255 (3) ◽  
pp. 685-687 ◽  
Author(s):  
R. Tetean ◽  
L. Chioncel ◽  
E. Burzo ◽  
N. Bucur ◽  
A. Bezergheanu ◽  
...  
Keyword(s):  
Physical Properties ◽  
Half Metallic ◽  
Metallic Ferromagnet

Vacancy-induced minority-spin states in half-metallic Heusler alloys

2007 ◽  
Vol 1 (5) ◽  
pp. 184-186 ◽  
Author(s):  
Kemal Özdoğan ◽  
Ersoy Şaşıoğlu ◽  
Iosif Galanakis
Keyword(s):  
Heusler Alloys ◽  
Spin States ◽  
Half Metallic ◽  
Minority Spin

scholarly journals Spin Gapless Semiconductor–Nonmagnetic Semiconductor Transitions in Fe-Doped Ti2CoSi: First-Principle Calculations

2018 ◽  
Vol 8 (11) ◽  
pp. 2200 ◽  
Author(s):  
Yu Feng ◽  
Zhou Cui ◽  
Ming-sheng Wei ◽  
Bo Wu ◽  
Sikander Azam
Keyword(s):  
Magnetic Moment ◽  
Electronic Structures ◽  
Magnetic Moments ◽  
Total Magnetic Moment ◽  
First Principle ◽  
Half Metallic ◽  
Heusler Compound ◽  
First Principle Calculations ◽  
Metallic Ferromagnet

Employing first-principle calculations, we investigated the influence of the impurity, Fe atom, on magnetism and electronic structures of Heusler compound Ti2CoSi, which is a spin gapless semiconductor (SGS). When the impurity, Fe atom, intervened, Ti2CoSi lost its SGS property. As TiA atoms (which locate at (0, 0, 0) site) are completely occupied by Fe, the compound converts to half-metallic ferromagnet (HMF) TiFeCoSi. During this SGS→HMF transition, the total magnetic moment linearly decreases as Fe concentration increases, following the Slate–Pauling rule well. When all Co atoms are substituted by Fe, the compound converts to nonmagnetic semiconductor Fe2TiSi. During this HMF→nonmagnetic semiconductor transition, when Fe concentration y ranges from y = 0.125 to y = 0.625, the magnetic moment of Fe atom is positive and linearly decreases, while those of impurity Fe and TiB (which locate at (0.25, 0.25, 0.25) site) are negative and linearly increase. When the impurity Fe concentration reaches up to y = 1, the magnetic moments of Ti, Fe, and Si return to zero, and the compound is a nonmagnetic semiconductor.

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