Contrasting Pressure Effects in Sr2VFeAsO3 and Sr2ScFePO3

Autor:	Kotegawa, H., Kawazoe, T., Tou, H., Murata, K., Ogino, H., Kishio, K., Shimoyama, J.
Rok vydání:	2009
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Zdroj:	J. Phys. Soc. Jpn. 78 (2009) 123707.
Druh dokumentu:	Working Paper
DOI:	10.1143/JPSJ.78.123707
Popis:	We report the resistivity measurements under pressure of two Fe-based superconductors with a thick perovskite oxide layer, Sr2VFeAsO3 and Sr2ScFePO3. The superconducting transition temperature Tc of Sr2VFeAsO3 markedly increases with increasing pressure. Its onset value, which was Tc{onset}=36.4 K at ambient pressure, increases to Tc{onset}=46.0 K at ~4 GPa, ensuring the potential of the "21113" system as a high-Tc material. However, the superconductivity of Sr2ScFePO3 is strongly suppressed under pressure. The Tc{onset} of ~16 K decreases to ~5 K at ~4 GPa, and the zero-resistance state is almost lost. We discuss the factor that induces this contrasting pressure effect. Comment: 5 pages, 4 figures, to be published in J. Phys. Soc. Jpn. No.12 (2009)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0908.1469 Zobrazit plný text záznamu View this record from Arxiv