Itinerant ferromagnetism in the As 4p conduction band of Ba0.6K0.4Mn2As2 identified by x-ray magnetic circular dichroism
- Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
In this study, x-ray magnetic circular dichroism (XMCD) measurements on single-crystal and powder samples of Ba0.6K0.4Mn2As2 show that the ferromagnetism below TC ≈ 100 K arises in the As 4p conduction band. No XMCD signal is observed at the Mn x-ray absorption edges. Below TC, however, a clear XMCD signal is found at the As K edge which increases with decreasing temperature. The XMCD signal is absent in data taken with the beam directed parallel to the crystallographic c axis indicating that the orbital magnetic moment lies in the basal plane of the tetragonal lattice. These results show that the previously reported itinerant ferromagnetism is associated with the As 4p conduction band and that distinct local-moment antiferromagnetism and itinerant ferromagnetism with perpendicular easy axes coexist in this compound at low temperature.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-07CH11358; AC02-06CH11357
- OSTI ID:
- 1227312
- Alternate ID(s):
- OSTI ID: 1183229
- Report Number(s):
- IS-J-8698; PRLTAO
- Journal Information:
- Physical Review Letters, Vol. 114, Issue 21; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Magnetic hexadecapole order and magnetopiezoelectric metal state in
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journal | August 2017 |
Magnetic Circular Dichroism in X-Ray Emission from Ferromagnets
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journal | September 2017 |
Orbital loop currents in iron-based superconductors | text | January 2017 |
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