تقرير
Large and significantly anisotropic critical current density induced by planar defects in CaKFe4As4 single crystals
| العنوان: | Large and significantly anisotropic critical current density induced by planar defects in CaKFe4As4 single crystals |
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| المؤلفون: | Pyon, Sunseng, Takahashi, Ayumu, Veshchunov, Ivan, Tamegai, Tsuyoshi, Ishida, Shigeyuki, Iyo, Akira, Eisaki, Hiroshi, Imai, Motoharu, Abe, Hideki, Terashima, Taichi, Ichinose, Ataru |
| المصدر: | Phys. Rev. B 99, 104506 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | Three independent components of critical current density, one for the H//c axis and the other two for the H//ab plane, have been studied in CaKFe4As4 single crystals. When the magnetic field is applied along the c axis, we observed fish-tail-like peaks in the M-H hysteresis loop, and the magnetization at higher temperatures exceeds that at lower temperatures at high fields. When the field is applied parallel to the ab plane, a dip structure is observed in the M-H hysteresis loop near the self-field. In addition, for the H//ab plane, we succeeded in separately evaluating the large and significantly anisotropic in-plane and out-of-plane Jc. Transmission electron microscopy revealed the presence of planar defects parallel to the ab plane in CaKFe4As4, which have not been observed in any other iron-based superconductors. We discuss the possible relationship between the anomalous Jc behavior and the planar defects. Comment: 19 pages, 8 figures + supplemental material 6 pages, 4 figures To be published in Phys. Rev. B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.99.104506 |
| URL الوصول: | http://arxiv.org/abs/1903.00866 |
| رقم الأكسشن: | edsarx.1903.00866 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.99.104506 |
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