Magnetism and site exchange in CuFeAs and CuFeSb: A microscopic and theoretical investigation
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
We have investigated the magnetic ground state of CuFeAs and CuFeSb by means of Fe-57-Mossbauer spectroscopy, muon spin rotation/ relaxation (mu SR), neutron diffraction, and electronic structure calculations. Both materials share the 111-LiFeAs crystal structure and are closely related to the class of iron-based superconductors. In both materials there is a considerable occupancy of the Cu site by Fe, which leads to ferromagnetic moments, which are magnetically strongly coupled to the regular Fe site magnetism. Our study shows that CuFeAs is close to an antiferromagnetic instability, whereas a ferromagnetic ground state is observed in CuFeSb, supporting theoretical models of anion height driven magnetism.
Details
Original language | English |
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Article number | 094415 |
Number of pages | 13 |
Journal | Physical Review B |
Volume | 95 |
Issue number | 9 |
Publication status | Published - 13 Mar 2017 |
Peer-reviewed | Yes |
External IDs
Scopus | 85015907665 |
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Keywords
Keywords
- IRON, SUPERCONDUCTOR, MOSSBAUER, LIFEAS