| Issue |
EPL
Volume 83, Number 1, July 2008
|
|
|---|---|---|
| Article Number | 17002 | |
| Number of page(s) | 4 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/83/17002 | |
| Published online | 11 June 2008 | |
Superconductivity and phase diagram in iron-based arsenic-oxides ReFeAsO
(Re = rare-earth metal) without fluorine doping
National Laboratory for Superconductivity, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences - P.O. Box 603, Beijing 100190, PRC
Corresponding authors: renzhian@aphy.iphy.ac.cn zhxzhao@aphy.iphy.ac.cn
Received:
16
April
2008
Accepted:
12
May
2008
Here we report a new class of superconductors prepared by high-pressure
synthesis in the quaternary family ReFeAsO
(Re = Sm, Nd, Pr, Ce, La) without fluorine doping. The onset
superconducting critical temperature (Tc) in these compounds increases
with the reduction of the Re atom size, and the highest Tc obtained so far
is 55 K in SmFeAsO. For the NdFeAsO
compound with different oxygen concentration a dome-shaped phase
diagram was found.
PACS: 74.10.+v – Occurrence, potential candidates / 74.70.-b – Superconducting materials
© EPLA, 2008
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