Phase transition, superstructure and physical properties of K2Fe4Se5

Details Phase transition, superstructure and physical properties of K2Fe4Se5 Phase transition, superstructure and physical properties of K2Fe4Se5

2011-04-26

arxiv.org/abs/1104.4844v1

Physics

Condensed Matter

Superconductivity

17pages, 5 figures, 1 table

Scientific paper

The structural features and physical properties of the antiferromagnetic K0.8Fe1.6Se2 (so called K2Fe4Se5 phase) have been studied in the temperature range from 300K up to 600K. Resistivity measurements on both single crystal and polycrystalline samples reveal a semiconducting behavior. Structural investigations of K2Fe4Se5 by means of transmission electron microscopy and powder x-ray diffraction demonstrate the presence of a well-defined superstructure within the a-b plane originating from a Fe-vacancy order along the [130] direction. Moreover, in-situ heating structural analysis shows that K0.8Fe1.6Se2 undergoes a transition of the Fe-vacancy order to disorder at about 600K. The phase separation and the Fe-vacancy ordering in the superconducting materials of KxFe2-ySe2 (0.2 \leq y \leq 0.3) has been briefly discussed.

Affiliated with

Also associated with

No associations

Rating

Phase transition, superstructure and physical properties of K2Fe4Se5 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 Phase transition, superstructure and physical properties of K2Fe4Se5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase transition, superstructure and physical properties of K2Fe4Se5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-295635