Competition between the modification of intrinsic superconducting properties and the pinning landscape under external pressure in CaKFe$_4$As$_4$ single crystals
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914939792261120 |
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| author | Huyan, Shuyuan Haberkorn, Nestor Xu, Mingyu Canfield, Paul C. Bud'ko, Sergey L. |
| author_facet | Huyan, Shuyuan Haberkorn, Nestor Xu, Mingyu Canfield, Paul C. Bud'ko, Sergey L. |
| contents | Measurements of low field magnetization, trapped flux magnetization and 5 K flux creep in single crystal of CaKFe$_4$As$_4$ under pressure up to 7.5 GPa in a diamond pressure cell are presented. The observed evolution of the temperature dependence of the self-field critical current and slowing down of the base temperature flux creep rate are explained within the two sources of pinning hypothesis involving presence of CaKFe$_4$As$_4$ intergrowths suggested in the literature. Above the half collapsed tetragonal structural transition under pressure, where superconductivity is non-bulk or absent, critically diminished or no diamagnetism and flux trapped magnetization were observed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_03809 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Competition between the modification of intrinsic superconducting properties and the pinning landscape under external pressure in CaKFe$_4$As$_4$ single crystals Huyan, Shuyuan Haberkorn, Nestor Xu, Mingyu Canfield, Paul C. Bud'ko, Sergey L. Superconductivity Measurements of low field magnetization, trapped flux magnetization and 5 K flux creep in single crystal of CaKFe$_4$As$_4$ under pressure up to 7.5 GPa in a diamond pressure cell are presented. The observed evolution of the temperature dependence of the self-field critical current and slowing down of the base temperature flux creep rate are explained within the two sources of pinning hypothesis involving presence of CaKFe$_4$As$_4$ intergrowths suggested in the literature. Above the half collapsed tetragonal structural transition under pressure, where superconductivity is non-bulk or absent, critically diminished or no diamagnetism and flux trapped magnetization were observed. |
| title | Competition between the modification of intrinsic superconducting properties and the pinning landscape under external pressure in CaKFe$_4$As$_4$ single crystals |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2409.03809 |