2026
Experimental and density functional theory study of the physical properties of XZnSb compounds, X = Ti, V, Cr
PODLOUCKY, Raimund; Gerda ROGL; Herwig MICHOR; Xinlin YAN; Vilma BURŠÍKOVÁ et al.Základní údaje
Originální název
Experimental and density functional theory study of the physical properties of XZnSb compounds, X = Ti, V, Cr
Autoři
PODLOUCKY, Raimund; Gerda ROGL; Herwig MICHOR; Xinlin YAN; Vilma BURŠÍKOVÁ; Pavel BROŽ; Jiri BURSIK; Erhard SCHAFLER; Gerald GIESTER; Ernst BAUER a Peter ROGL
Vydání
ACTA MATERIALIA, OXFORD, PERGAMON-ELSEVIER SCIENCE LTD, 2026, 1359-6454
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10403 Physical chemistry
Stát vydavatele
Spojené státy
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 9.300 v roce 2024
Označené pro přenos do RIV
Ano
Organizační jednotka
Přírodovědecká fakulta
UT WoS
EID Scopus
Klíčová slova anglicky
Transition-metal antimonides; Physical properties; DFT stability; Electronic density of states; Vacancies; Charge transfer
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 9. 6. 2026 10:37, Mgr. Pavla Foltynová, Ph.D.
Anotace
V originále
We present combined experimental and density functional theory (DFT) studies on compounds XZnSb (X = Ti,V, Cr) and Ti0.5V0.5ZnSb, V0.9X0.1ZnSb (X = Ti,Cr). Physical property measurements i.e. specific heat, magnetization, electrical resistivity, Seebeck coefficient, Vickers hardness and elastic moduli were carried out for polycrystalline single-phase materials. From X-ray single crystal data and Rietveld analyses all these phases were found to crystallize with the MnAlGe-type. For all three polycrystalline compounds XZnSb (X = Ti,V,Cr) the temperature dependent electrical resistivity combines metallic (at lower) and semiconducting-like features (at higher temperatures). Low temperature specific heat data of TiZnSb and earlier studied Cr0.86ZnSb conform with a low temperature metallic behaviour, yielding electronic Sommerfeld coefficients gamma = 6.4(1) mJ.mol-1K-2 and 10.7(5) mJ.mol-1K-2, respectively. The specific heat of VZnSb, however, deviates towards lowest temperatures from a simple metallic behaviour and accordingly, allowing only a rough estimate of gamma, to around 6 to 8 mJ.mol-1K-2. While Cr0.86ZnSb exhibits antiferromagnetic order below about 200 K, magnetic susceptibility data of TiZnSb and VZnSb infer a paramagnetic behaviour. DFT calculations were made to derive various physical properties, such as structural and magnetic stabilities, charge transfer and atomic size, electronic structure (density of states, band structure), electronic transport properties (Seebeck coefficient and resistivity) within Boltzmann's transport theory, as well as elastic properties. All the results are obtained for fully relaxed structural parameters. Spin polarized DFT calculations for VZnSb result in an antiferromagnetic ground state with local V-moments of about 1 & micro;B, which is only slightly more stable than ferromagnetic ordering.
Návaznosti
| LM2023039, projekt VaV |
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| 8J23AT014, projekt VaV |
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