Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation

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Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation. / Pristáš, Gabriel; Gruber, Georg; Orendáč, Matúš et al.
In: Acta materialia, Vol. 262.2024, No. 1 January, 119428, 12.10.2023.

Research output: Contribution to journalArticleResearchpeer-review

Harvard

Pristáš, G, Gruber, G, Orendáč, M, Bačkai, J, Kačmarčík, J, Košuth, F, Gabáni, S, Szabó, P, Mitterer, C & Flachbart, K 2023, 'Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation', Acta materialia, vol. 262.2024, no. 1 January, 119428. https://doi.org/10.1016/j.actamat.2023.119428

APA

Pristáš, G., Gruber, G., Orendáč, M., Bačkai, J., Kačmarčík, J., Košuth, F., Gabáni, S., Szabó, P., Mitterer, C., & Flachbart, K. (2023). Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation. Acta materialia, 262.2024(1 January), Article 119428. Advance online publication. https://doi.org/10.1016/j.actamat.2023.119428

Vancouver

Pristáš G, Gruber G, Orendáč M, Bačkai J, Kačmarčík J, Košuth F et al. Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation. Acta materialia. 2023 Oct 12;262.2024(1 January):119428. Epub 2023 Oct 12. doi: 10.1016/j.actamat.2023.119428

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@article{a81da63d69ee455a9d575291ef91355e,
title = "Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation",
abstract = "We report about the influence of nitrogen incorporation on the superconducting transition temperature T C of TiNbMoTaW high entropy alloy films deposited using high power impulse magnetron sputtering. By measuring the temperature dependence of resistivity of (TiNbMoTaW)N x nitrides, we observe a significant increase of T C, from 0.62 K for x = 0 up to 5.02 K for x = 0.74. With further increase of x, T C is decreasing and reaches 1.08 K for x = 0.97. The eightfold T C enhancement seems to be associated with the incorporation of light N atoms into the face-centered cubic lattice and with the x dependent enhancement of the electron-phonon interaction, which may be related to the high configuration entropy in high entropy alloys. Measurements in magnetic field show that the upper critical fields B c2 of (TiNbMoTaW)N x with x > 0.15 provide B c2/T C > 2 T/K ratios, which are above the weak-coupling pair breaking limit. Additional heat capacity and point contact spectroscopy measurements show that the superconductivity in the ∼1 μm thick films is bulk in nature, consistent with conventional weak-coupling phonon mediated superconductivity. The proposed strategy of nitrogen incorporation into high entropy alloys may pave a pathway towards tailoring their superconducting properties, especially their T C.",
author = "Gabriel Prist{\'a}{\v s} and Georg Gruber and Mat{\'u}{\v s} Orend{\'a}{\v c} and J{\'u}lius Ba{\v c}kai and Jozef Ka{\v c}mar{\v c}{\'i}k and Filip Ko{\v s}uth and Slavom{\'i}r Gab{\'a}ni and Pavol Szab{\'o} and Christian Mitterer and Karol Flachbart",
note = "Publisher Copyright: {\textcopyright} 2023",
year = "2023",
month = oct,
day = "12",
doi = "10.1016/j.actamat.2023.119428",
language = "English",
volume = "262.2024",
journal = "Acta materialia",
issn = "1359-6454",
publisher = "Elsevier",
number = "1 January",

}

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TY - JOUR

T1 - Multiple transition temperature enhancement in superconducting TiNbMoTaW high entropy alloy films through tailored N incorporation

AU - Pristáš, Gabriel

AU - Gruber, Georg

AU - Orendáč, Matúš

AU - Bačkai, Július

AU - Kačmarčík, Jozef

AU - Košuth, Filip

AU - Gabáni, Slavomír

AU - Szabó, Pavol

AU - Mitterer, Christian

AU - Flachbart, Karol

N1 - Publisher Copyright: © 2023

PY - 2023/10/12

Y1 - 2023/10/12

N2 - We report about the influence of nitrogen incorporation on the superconducting transition temperature T C of TiNbMoTaW high entropy alloy films deposited using high power impulse magnetron sputtering. By measuring the temperature dependence of resistivity of (TiNbMoTaW)N x nitrides, we observe a significant increase of T C, from 0.62 K for x = 0 up to 5.02 K for x = 0.74. With further increase of x, T C is decreasing and reaches 1.08 K for x = 0.97. The eightfold T C enhancement seems to be associated with the incorporation of light N atoms into the face-centered cubic lattice and with the x dependent enhancement of the electron-phonon interaction, which may be related to the high configuration entropy in high entropy alloys. Measurements in magnetic field show that the upper critical fields B c2 of (TiNbMoTaW)N x with x > 0.15 provide B c2/T C > 2 T/K ratios, which are above the weak-coupling pair breaking limit. Additional heat capacity and point contact spectroscopy measurements show that the superconductivity in the ∼1 μm thick films is bulk in nature, consistent with conventional weak-coupling phonon mediated superconductivity. The proposed strategy of nitrogen incorporation into high entropy alloys may pave a pathway towards tailoring their superconducting properties, especially their T C.

AB - We report about the influence of nitrogen incorporation on the superconducting transition temperature T C of TiNbMoTaW high entropy alloy films deposited using high power impulse magnetron sputtering. By measuring the temperature dependence of resistivity of (TiNbMoTaW)N x nitrides, we observe a significant increase of T C, from 0.62 K for x = 0 up to 5.02 K for x = 0.74. With further increase of x, T C is decreasing and reaches 1.08 K for x = 0.97. The eightfold T C enhancement seems to be associated with the incorporation of light N atoms into the face-centered cubic lattice and with the x dependent enhancement of the electron-phonon interaction, which may be related to the high configuration entropy in high entropy alloys. Measurements in magnetic field show that the upper critical fields B c2 of (TiNbMoTaW)N x with x > 0.15 provide B c2/T C > 2 T/K ratios, which are above the weak-coupling pair breaking limit. Additional heat capacity and point contact spectroscopy measurements show that the superconductivity in the ∼1 μm thick films is bulk in nature, consistent with conventional weak-coupling phonon mediated superconductivity. The proposed strategy of nitrogen incorporation into high entropy alloys may pave a pathway towards tailoring their superconducting properties, especially their T C.

UR - http://www.scopus.com/inward/record.url?scp=85174142484&partnerID=8YFLogxK

U2 - 10.1016/j.actamat.2023.119428

DO - 10.1016/j.actamat.2023.119428

M3 - Article

VL - 262.2024

JO - Acta materialia

JF - Acta materialia

SN - 1359-6454

IS - 1 January

M1 - 119428

ER -