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
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909805740818432 |
|---|---|
| author | Le, Tien Lee, Yeonkyu Tran, Dzung T. Choi, Woo Seok Kang, Won Nam Yun, Jinyoung Kim, Jeehoon Song, Jaegu Han, Yoonseok Park, Tuson Tran, Duc H. Jung, Soon-Gil Hwang, Jungseek |
| author_facet | Le, Tien Lee, Yeonkyu Tran, Dzung T. Choi, Woo Seok Kang, Won Nam Yun, Jinyoung Kim, Jeehoon Song, Jaegu Han, Yoonseok Park, Tuson Tran, Duc H. Jung, Soon-Gil Hwang, Jungseek |
| contents | 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 $μ_0$Hc$_2$ (13.45 T) and Tc (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 ($λ$) 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 λ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_20650 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | 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 Le, Tien Lee, Yeonkyu Tran, Dzung T. Choi, Woo Seok Kang, Won Nam Yun, Jinyoung Kim, Jeehoon Song, Jaegu Han, Yoonseok Park, Tuson Tran, Duc H. Jung, Soon-Gil Hwang, Jungseek Superconductivity Materials Science 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 $μ_0$Hc$_2$ (13.45 T) and Tc (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 ($λ$) 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 λ 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. |
| title | 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 |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2509.20650 |