Complex magnetism of Ho-Dy-Y-Gd-Tb hexagonal high-entropy alloy

Lužnik, J.; Koželj, Primož; Vrtnik, S.; Jelen, Andreja; Jagličić, Zvonko; Meden, Anton; Feuerbacher, M.; Dolinšek, J.

doi:10.1103/physrevb.92.224201

Cited by 82 publications

(54 citation statements)

References 27 publications

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“…However, present research of HEAs seems somewhat uneven, with the main effort invested in the development of new structural materials, thus focused on their mechanical properties, microstructure and thermal stability (e.g., [5,14,17]). Meanwhile, the research aimed at their electronic structures and properties, both experimental [5,18,19,20,21,22,23,24] and theoretical [5,25,26,27,28,29], is in spite of their potential as functional materials [5] still insufficient. The lack of insight into their electronic structure which in metallic systems determines almost all their properties (e.g., [30,31]) hinders the conceptual understanding of both crystalline (c-) and amorphous (a-) HEAs [19,24].…”

Section: Introductionmentioning

confidence: 99%

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Kuveždić

Tafra

Basletić

et al. 2020

Journal of Non-Crystalline Solids

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We present results of comprehensive study of electronic properties of (TiZrNbCu) 1−x Ni x metallic glasses performed in broad composition range x encompassing both, high entropy (HE) range, and conventional Ni-base alloy concentration range, x ≥ 0.35. The electronic structure studied by photoemission spectroscopy and low temperature specific heat (LTSH) reveal a split-band structure of density of states inside valence band with d-electrons of Ti, Zr, Nb and also Ni present at Fermi level N (E F ), whereas LTSH and magnetoresistivity results show that variation of N (E F ) with x changes in Ni-base regime. The variation of superconducting transition temperatures with x closely follows that of N (E F ). The electrical resistivities of all alloys are high and decreasewith increasing temperature over most of explored temperature range, and their temperature dependence seems dominated by weak localization effects over a broad temperature range (10 − 300 K). The preliminary study of Hall

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Section: Introductionmentioning

confidence: 99%

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Kuveždić

Tafra

Basletić

et al. 2020

Journal of Non-Crystalline Solids

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“…Furthermore, HEAs have been found to be good model systems for investigating fundamental physical interactions, as their properties often fall between those of crystalline and amorphous materials, see e.g. references [13] and [14]. Of particular interest is the recent observation of superconductivity in the HEA Ta-Nb-Hf-Zr-Ti [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Isoelectronic substitutions and aluminium alloying in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor

Rohr

Cava

2018

Phys. Rev. Materials

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High-entropy alloys (HEAs) are a new class of materials constructed from multiple principal elements statistically arranged on simple crystallographic lattices.Due to the large amount of disorder present, they are excellent model systems for investigating the properties of materials intermediate between crystalline and amorphous states.Here we report the effects of systematic isoelectronic replacements, using Mo-Y, Mo-Sc, and Cr-Sc mixtures, for the valence electron count 4 and 5 elements in the BCC Ta-Nb-Zr-Hf-Ti high entropy alloy (HEA) superconductor. We find that the superconducting transition temperature T c strongly depends on the elemental make-up of the alloy, and not exclusively its electron count. The replacement of niobium or tantalum by an isoelectronic mixture lowers the transition temperature by more than 60 %, while the isoelectronic replacement of hafnium, zirconium, or titanium has a limited impact on T c . We further explore the alloying of aluminium into the nearly optimal electron count [TaNb] 0.67 (ZrHfTi) 0.33 HEA superconductor. The electron count dependence of the superconducting T c for (HEA)Al x is found to be more crystalline-like than for the [TaNb] 1-x (ZrHfTi) x HEA solid solution. For an aluminum content of x = 0.4 the high-entropy stabilization of the simple BCC lattice breaks down. This material crystallizes in the tetragonal β-uranium structure type and superconductivity is not observed above 1.8 K.

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“…Especially puzzling is the near absence of experimental studies of the electronic structures of HEAs and of those properties directly related to the electronic structure. In particular, only four studies of their "low-temperature specific heat" (LTSH) have been reported so far [18,19,20,21] and the first "angle-resolved photoemission spectroscopy" (ARPES) studies have been performed by us recently [22].Theoretical studies of the electronic structure of HEAs, although more abundant than experimental ones, are still insufficient and with a few notable exceptions (e.g. [23,24,25,26,27]) are mainly focussed on the phases of stability and mechanical properties (see for instance ).…”

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confidence: 99%

Structure property relationship in (TiZrNbCu)_1−xNi_x metallic glasses

et al. 2018

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Complex magnetism of Ho-Dy-Y-Gd-Tb hexagonal high-entropy alloy

Cited by 82 publications

References 27 publications

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Isoelectronic substitutions and aluminium alloying in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor

Structure property relationship in (TiZrNbCu)_1−xNi_x metallic glasses

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Complex magnetism of Ho-Dy-Y-Gd-Tb hexagonal high-entropy alloy

Cited by 82 publications

References 27 publications

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Change of electronic properties on transition from high-entropy to Ni-rich (TiZrNbCu)1−xNi alloys

Isoelectronic substitutions and aluminium alloying in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor

Structure property relationship in (TiZrNbCu)1−xNix metallic glasses

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Structure property relationship in (TiZrNbCu)_1−xNi_x metallic glasses