English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

A-site ordered perovskite CaCu3Cu2Ir2O12-delta with square-planar and octahedral coordinated Cu ions

MPS-Authors
/persons/resource/persons126666

Hu,  Zhi-Wei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Zhao, Q., Yin, Y.-Y., Dai, J.-H., Shen, X., Hu, Z.-W., Yang, J.-Y., et al. (2016). A-site ordered perovskite CaCu3Cu2Ir2O12-delta with square-planar and octahedral coordinated Cu ions. Chinese Physics B, 25(2): 020701, pp. 1-6. doi:10.1088/1674-1056/25/2/020701.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-0983-F
Abstract
A novel CaCu3Cu2Ir2O12-delta polycrystalline sample was synthesized at 8 GPa and 1373 K. Rietveld structural analysis shows that this compound crystallizes in an AA(3)'B4O12-type A-site ordered perovskite structure with space group Im-3. X-ray absorption spectra reveal a +2-charge state for both the square-planar and octahedral coordinated Cu ions, and the valence state of Ir is found to be about +5. Although the A-site Ca and the A'-site Cu2+ are 1:3 ordered at fixed atomic positions, the distribution of B-site Cu2+ and Ir5+ is disorderly. As a result, no long-range magnetic ordering is observed at temperatures down to 2 K. Electrical transport and heat capacity measurements demonstrate itinerant electronic behavior. The crystal structure is stable with pressure up to 35.7 GPa at room temperature.