Effect of C additives with 0.5 % in weight on structural, optical and superconducting properties of Ta-Nb-Hf-Zr-Ti high entropy alloy films

被引：1

作者：

Le, Tien ^{[1
,2
]}

Lee, Yeonkyu ^{[3
]}

Tran, Dzung T. ^{[2
]}

Choi, Woo Seok ^{[2
]}

Kang, Won Nam ^{[2
]}

Yun, Jinyoung ^{[3
]}

Kim, Jeehoon ^{[3
]}

Song, Jaegu ^{[4
]}

Han, Yoonseok ^{[4
]}

Park, Tuson ^{[4
]}

Tran, Duc H. ^{[5
]}

Jung, Soon-Gil ^{[6
]}

Hwang, Jungseek ^{[2
]}

机构：

[1] Univ Sci & Technol Hanoi, Vietnam Acad Sci & Technol, 18 Hoang Quoc Viet, Cau Giay 100000, Hanoi, Vietnam

[2] Sungkyunkwan Univ, Dept Phys, Suwon 16419, South Korea

[3] Pohang Univ Sci & Technol, Dept Phys, Pohang 37673, South Korea

[4] Sungkyunkwan Univ, Ctr Quantum Mat & Superconduct CQMS, Dept Phys, Suwon 16419, South Korea

[5] Univ Sci, Vietnam Natl Univ, Fac Phys, Hanoi 100000, Vietnam

[6] Sunchon Natl Univ, Dept Phys Educ, Sunchon 57922, South Korea

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2024年 / 1008卷

基金：

新加坡国家研究基金会;

关键词：

Ta-Nb-Hf-Zr-Ti; High entropy alloy; Superconductivity; Optical properties; Magnetic force microscopy; TEMPERATURE;

D O I：

10.1016/j.jallcom.2024.176863

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated the superconducting (SC) properties of Ta-Nb-Hf-Zr-Ti high-entropy alloy (HEA) thin films with 0.5 % weight C additives. The C additives stabilize the structural properties and enhance the SC critical properties, including mu 0 H c2 (13.45 T) and T c (7.5 K). The reflectance of the C-added HEA film is enhanced in the low-energy region, resulting in a higher optical conductivity, which is consistent with the lower electrical resistivity. In addition, we observed SC vortices in the C-added HEA film using magnetic force microscopy. The magnetic penetration depths (7) 7 ) of the pure HEA and C-added HEA films were estimated from their Meissner force curves by comparing them with those of a reference Nb film. At 4.2 K, the 7 of the C-added film is 360 nm, shorter than that of the pure HEA film (560 nm), indicating stronger superconductivity against an applied magnetic field.

引用

页数：8

共 47 条

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