Structural analysis and transport properties of [010]-tilt grain boundaries in Fe(Se,Te)
| Autor: | Kazumasa Iida, Yoshihiro Yamauchi, Takafumi Hatano, Kai Walter, Bernhard Holzapfel, Jens Hänisch, Zimeng Guo, Hongye Gao, Haoshan Shi, Shinnosuke Tokuta, Satoshi Hata, Akiyasu Yamamoto, Hiroshi Ikuta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Science and Technology of Advanced Materials (2024) |
| Druh dokumentu: | article |
| ISSN: | 14686996 1878-5514 1468-6996 |
| DOI: | 10.1080/14686996.2024.2384829 |
| Popis: | Understanding the nature of grain boundaries is a prerequisite for fabricating high-performance superconducting bulks and wires. For iron-based superconductors [e.g. Ba(Fe,Co)[Formula: see text]As[Formula: see text], Fe(Se,Te), and NdFeAs(O,F)], the dependence of the critical current density [Formula: see text] on misorientation angle ([Formula: see text]) has been explored on [001]-tilt grain boundaries, but no data for other types of orientations have been reported. Here, we report on the structural and transport properties of Fe(Se,Te) grown on CeO[Formula: see text]-buffered symmetric [010]-tilt roof-type SrTiO[Formula: see text] bicrystal substrates by pulsed laser deposition. X-ray diffraction and transmission electron microscopy revealed that [Formula: see text] of Fe(Se,Te) was smaller whereas [Formula: see text] of CeO[Formula: see text] was larger than that of the substrate. The difference in [Formula: see text] between the CeO[Formula: see text] buffer layer and the substrate is getting larger with increasing [Formula: see text]. For [Formula: see text] of the substrates, [Formula: see text] of Fe(Se,Te) was zero, whereas [Formula: see text] of CeO[Formula: see text] was continuously increasing. The inclined growth of CeO[Formula: see text] can be explained by the geometrical coherency model. The [Formula: see text]-axis growth of Fe(Se,Te) for [Formula: see text] of the substrates is due to the domain matching epitaxy on (221) planes of CeO[Formula: see text]. Electrical transport measurements confirmed no reduction of inter-grain [Formula: see text] for [Formula: see text], indicative of strong coupling between the grains. |
| Databáze: | Directory of Open Access Journals |
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