Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO

Details Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO

2008-04-28

arxiv.org/abs/0804.4290v2

Europhysics Letters 83, 67006 (2008).

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1209/0295-5075/83/67006

Following the discovery of superconductivity in an iron-based arsenide LaO1-xFxFeAs with a superconducting transition temperature (Tc) of 26 K[1], Tc was pushed up surprisingly to above 40 K by either applying pressure[2] or replacing La with Sm[3], Ce[4], Nd[5] and Pr[6]. The maximum Tc has climbed to 55 K, observed in SmO1-xFxFeAs[7, 8] and SmFeAsO1-x[9]. The value of Tc was found to increase with decreasing lattice parameters in LnFeAsO1-xFx (Ln stands for the lanthanide elements) at an apparently optimal doping level. However, the F- doping in GdFeAsO is particularly difficult[10,11] due to the lattice mismatch between the Gd2O2 layers and Fe2As2 layers. Here we report observation of superconductivity with Tc as high as 56 K by the Th4+ substitution for Gd3+ in GdFeAsO. The incorporation of relatively large Th4+ ions relaxes the lattice mismatch, hence induces the high temperature superconductivity.

Affiliated with

Also associated with

No associations

Rating

Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-690642