Anomalous magneto-elastic and charge doping effects in thallium-doped BaFe2As2
Abstract
Within the BaFe2As2 crystal lattice, we partially substitute thallium for barium and report the effects of interlayer coupling in Ba1-xTlxFe2As2 crystals. We demonstrate the unusual effects of magneto-elastic coupling and charge doping in this iron-arsenide material, whereby Néel temperature rises with small x, and then falls with additional x. Specifically, we find that Néel and structural transitions in BaFe2As2 (TN = Ts = 133 K) increase for x = 0.05 (TN = 138 K, Ts = 140 K) from magnetization, heat capacity, resistivity, and neutron diffraction measurements. Evidence from single crystal X-ray diffraction and first principles calculations attributes the stronger magnetism in x = 0.05 to magneto-elastic coupling related to the shorter intraplanar Fe-Fe bond distance. With further thallium substitution, the transition temperatures decrease for x = 0.09 (TN = Ts = 131 K), and this is due to charge doping. Lastly, we illustrate that small changes related to 3d transition-metal state can have profound effects on magnetism.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Sciences Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1259855
- Alternate Identifier(s):
- OSTI ID: 1267059
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 6; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; magnetic properties and materials; superconducting properties and materials
Citation Formats
Sefat, Athena S., Li, Li, Cao, Huibo B., McGuire, Michael A., Sales, Brian, Custelcean, Radu, and Parker, David S. Anomalous magneto-elastic and charge doping effects in thallium-doped BaFe2As2. United States: N. p., 2016.
Web. doi:10.1038/srep21660.
Sefat, Athena S., Li, Li, Cao, Huibo B., McGuire, Michael A., Sales, Brian, Custelcean, Radu, & Parker, David S. Anomalous magneto-elastic and charge doping effects in thallium-doped BaFe2As2. United States. https://doi.org/10.1038/srep21660
Sefat, Athena S., Li, Li, Cao, Huibo B., McGuire, Michael A., Sales, Brian, Custelcean, Radu, and Parker, David S. Fri .
"Anomalous magneto-elastic and charge doping effects in thallium-doped BaFe2As2". United States. https://doi.org/10.1038/srep21660. https://www.osti.gov/servlets/purl/1259855.
@article{osti_1259855,
title = {Anomalous magneto-elastic and charge doping effects in thallium-doped BaFe2As2},
author = {Sefat, Athena S. and Li, Li and Cao, Huibo B. and McGuire, Michael A. and Sales, Brian and Custelcean, Radu and Parker, David S.},
abstractNote = {Within the BaFe2As2 crystal lattice, we partially substitute thallium for barium and report the effects of interlayer coupling in Ba1-xTlxFe2As2 crystals. We demonstrate the unusual effects of magneto-elastic coupling and charge doping in this iron-arsenide material, whereby Néel temperature rises with small x, and then falls with additional x. Specifically, we find that Néel and structural transitions in BaFe2As2 (TN = Ts = 133 K) increase for x = 0.05 (TN = 138 K, Ts = 140 K) from magnetization, heat capacity, resistivity, and neutron diffraction measurements. Evidence from single crystal X-ray diffraction and first principles calculations attributes the stronger magnetism in x = 0.05 to magneto-elastic coupling related to the shorter intraplanar Fe-Fe bond distance. With further thallium substitution, the transition temperatures decrease for x = 0.09 (TN = Ts = 131 K), and this is due to charge doping. Lastly, we illustrate that small changes related to 3d transition-metal state can have profound effects on magnetism.},
doi = {10.1038/srep21660},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {Fri Feb 12 00:00:00 EST 2016},
month = {Fri Feb 12 00:00:00 EST 2016}
}
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