Flux-trapping experiments on ultra-high pressure hydrides as evidence of superconductivity
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866914952051163136 |
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| author | Tallon, Jeffery L. |
| author_facet | Tallon, Jeffery L. |
| contents | Flux-trapping magnetization studies on H3S at ultra-high pressure have been reported by Minkov et al. as definitive evidence of superconductivity in this hydride system. This is very helpful in a field that has become somewhat controversial. However, this conclusion has been questioned based on an apparent zero-field cooled (ZFC) linear magnetization at low field. The standard Bean model would require an approximately quadratic dependence. In support, we note that the reported ZFC magnetization is indeed super-linear and consistent both with model calculations for thin discs and with the ZFC magnetization reported for YBa2Cu3Oy films. We conclude that the reported high-pressure magnetization data is fully consistent with superconductivity and that there is no reason, in this particular data set, to reject the original inference of hydride superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_12351 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flux-trapping experiments on ultra-high pressure hydrides as evidence of superconductivity Tallon, Jeffery L. Superconductivity Flux-trapping magnetization studies on H3S at ultra-high pressure have been reported by Minkov et al. as definitive evidence of superconductivity in this hydride system. This is very helpful in a field that has become somewhat controversial. However, this conclusion has been questioned based on an apparent zero-field cooled (ZFC) linear magnetization at low field. The standard Bean model would require an approximately quadratic dependence. In support, we note that the reported ZFC magnetization is indeed super-linear and consistent both with model calculations for thin discs and with the ZFC magnetization reported for YBa2Cu3Oy films. We conclude that the reported high-pressure magnetization data is fully consistent with superconductivity and that there is no reason, in this particular data set, to reject the original inference of hydride superconductivity. |
| title | Flux-trapping experiments on ultra-high pressure hydrides as evidence of superconductivity |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2409.12351 |