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Heusler-type Fe2VAl compound is a promising thermoelectric candidate with non-magnetic ground state. The present work investigates the Seebeck coefficient (S) of Fe2VAl in the temperature region 300 to 620 K with the help of experimental…

材料科学 · 物理学 2018-09-20 Shamim Sk , P. Devi , Sanjay Singh , Sudhir K Pandey

First-principles phonon calculations along with Kohn-Sham density functional theory (DFT) is an essential tool to study the lattice dynamics, thermodynamical properties and phase-transitions of materials. The two full-Heusler compounds…

强关联电子 · 物理学 2018-06-18 Shivprasad S. Shastri , Sudhir K. Pandey

The alloys with 8/18/24 valence electron count (VEC) are promising candidates for efficient energy conversion and refrigeration applications at low as well as high temperatures. The full potential linearized augmented plane wave method as…

材料科学 · 物理学 2022-05-17 Mukesh K. Choudhary , H. Fjellvåg , P. Ravindran

In the quest of new thermoelectric (TE) materials with high power factors, full-Heusler compounds having flat band are found to be promising candidates. In this direction, Fe$_{2}$ScX (X=P,As,Sb) compounds are investigated using mBJ for the…

强关联电子 · 物理学 2019-12-30 Shivprasad S. Shastri , Sudhir K. Pandey

The structural and elastic properties as well as phonon-dispersion relations of the Heusler-type alloys Fe$_2$VAl and Fe$_2$VGa are computed using density-functional and density-functional perturbation theory within the generalized-gradient…

材料科学 · 物理学 2015-05-13 V. Kanchana , G. Vaitheeswaran , Yanming Ma , Yu Xie , A. Svane , O. Eriksson

By using ab initio electronic structure calculations here we report the three new full Heusler alloys which are possessing very good thermoelectric behavior and expected to be synthesized in the laboratories. These are Fe2 ScP, Fe2 ScAs and…

材料科学 · 物理学 2015-06-22 Sonu Sharma , Sudhir K. Pandey

Heusler compounds with six valence electrons per atom have attracted interest as thermoelectric materials owing to their semimetallic and semiconducting properties. Here, we theoretically and experimentally investigate electronic transport…

材料科学 · 物理学 2024-12-10 Fabian Garmroudi , Michael Parzer , Takao Mori , Andrej Pustogow , Ernst Bauer

Heusler type compounds have long been recognized as potential thermoelectric (TE) materials. Here, the experimentally observed TE properties of Fe$_{2}$VAl are understood through electronic structure calculations in the temperature range of…

材料科学 · 物理学 2022-04-20 Shamim Sk , P. Devi , Sanjay Singh , Sudhir K. Pandey

The potential of Fe2TiSn full-Heusler compounds for thermoelectric applications has been suggested theoretically, but not yet grounded experimentally, due to the difficulty of obtaining reproducible, homogeneous, phase pure and defect free…

Within the framework of density functional theory, the electronic structure and magnetic properties have been studied for the Ti\raisebox{-.2ex}{\scriptsize 2}FeSn full-Heusler compound. The ferromagnetic state is found to be energetically…

材料科学 · 物理学 2013-09-26 A. Birsan , P. Palade

The knowledge of Half-Heusler compounds have attracted much attention as materials for thermoelectric applications. In this work, we investigate, using first-principles calculations, the electronic, vibrational, and defect properties of…

材料科学 · 物理学 2024-10-30 Mateus Corradini Lopes , Alex Antonelli

In this study, theoretical investigation on structural, electronic, magnetic, elastic and thermoelectric properties of the full Heusler Co$_2$YPb (Y = Tc, Ti, Zr and Hf) alloys have been performed within density functional theory (DFT). The…

材料科学 · 物理学 2025-12-29 N. Saidi , A. Abbad , W. Benstaali , K. Bahnes

In this paper, we use the first-principles calculations based on the density functional theory to investigate structural, electronic and magnetic properties of Fe$_{2}$YSn with (Y = Mn, Ti and V). The generalized gradient approximation…

材料科学 · 物理学 2021-06-28 M. Sayah , S. Zeffane , M. Mokhtari , F. Dahmane , L. Zekri , R. Khenata , N. Zekri

Double half-heusler alloys are the new class of compounds which can be seen as transmuted version of two single half-heusler with higher flexibility of tuning their properties. Here, we report a detailed study of thermoelectric (TE)…

材料科学 · 物理学 2025-03-05 Bhawna Sahni , Aftab Alam

Density-functional studies of the electronic structures and exchange interaction parameters have been performed for a series of ferromagnetic full Heusler alloys of general formula Co$_2$MnZ (Z = Ga, Si, Ge, Sn), Rh$_2$MnZ (Z = Ge, Sn, Pb),…

材料科学 · 物理学 2009-11-10 Yasemin Kurtulus , Richard Dronskowski , German Samolyuk , Vladimir P. Antropov

Density functional theory (DFT) calculations confirm that the structurally ordered Fe$_2$VAl Heusler alloy is nonmagnetic narrow-gap semiconductor. This compound is apt to form various disordered modifications with high concentration of…

Heusler compounds have emerged as important thermoelectric materials due to their combination of promising electronic transport properties, mechanical robustness and chemical stability -- key aspects for practical device integration. While…

Heusler compounds form a numerous class of intermetallics, which include two families of compositions ABC and AB2C, usually referred to as half- and full-Heusler compounds, respectively. Given their tunable electronic properties, made…

材料科学 · 物理学 2018-07-17 M. Pani , I. Pallecchi , C. Bernini , N. Ardoino , D. Marré

Td-WTe2 is a topological Weyl semimetal. WTe2 in the orthorhombic structure is stable at room temperature. Elastic, electronic, bonding, and optoelectronic properties of WTe2 have been investigated in detail in this work using the density…

材料科学 · 物理学 2020-12-01 B. Rahman Rano , Ishtiaque M. Syed , S. H. Naqib

We assess the performance of recent density functionals for the exchange-correlation energy of a nonmolecular solid, by applying accurate calculations with the GAUSSIAN, BAND, and VASP codes to a test set of 24 solid metals and non-metals.…

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