Al 27 NMR insight into the phase transition in BaFe2Al9

C. Y. Huang; H. Y. Lee; Y. C. Chang; Chon Kit Hong; Y. R. Ou; C. N. Kuo; C. S. Lue

doi:10.1103/PhysRevB.106.195101

Al 27 NMR insight into the phase transition in BaFe2Al9

C. Y. Huang, H. Y. Lee, Y. C. Chang, Chon Kit Hong, Y. R. Ou, C. N. Kuo, C. S. Lue

Department of Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We have applied Al27 nuclear magnetic resonance (NMR) spectroscopy to investigate the iron-based aluminide of BaFe2Al9. This material has been a subject of current interest due to indications of charge density wave behavior below the transition temperature TC≃100 K. Two sets of the Al27 NMR resonance lines that are associated with two nonequivalent crystallographic aluminum sites have been well resolved. We have discussed the obtained electric field gradient and anisotropic Knight shift for each individual aluminum site, revealing the strong ab plane bonding configuration for the structural properties of BaFe2Al9. Pronounced features in the isotropic Knight shift and nuclear spin-lattice relaxation rate have been observed in the vicinity of TC. Furthermore, the detailed Al27 NMR analyses have provided evidence for the decrease of the electronic density of states upon lowering temperature below TC.

Original language	English
Article number	195101
Journal	Physical Review B
Volume	106
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.106.195101
Publication status	Published - 2022 Nov 15

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.106.195101

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title = "Al 27 NMR insight into the phase transition in BaFe2Al9",

abstract = "We have applied Al27 nuclear magnetic resonance (NMR) spectroscopy to investigate the iron-based aluminide of BaFe2Al9. This material has been a subject of current interest due to indications of charge density wave behavior below the transition temperature TC≃100 K. Two sets of the Al27 NMR resonance lines that are associated with two nonequivalent crystallographic aluminum sites have been well resolved. We have discussed the obtained electric field gradient and anisotropic Knight shift for each individual aluminum site, revealing the strong ab plane bonding configuration for the structural properties of BaFe2Al9. Pronounced features in the isotropic Knight shift and nuclear spin-lattice relaxation rate have been observed in the vicinity of TC. Furthermore, the detailed Al27 NMR analyses have provided evidence for the decrease of the electronic density of states upon lowering temperature below TC.",

author = "Huang, {C. Y.} and Lee, {H. Y.} and Chang, {Y. C.} and Hong, {Chon Kit} and Ou, {Y. R.} and Kuo, {C. N.} and Lue, {C. S.}",

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AU - Huang, C. Y.

AU - Lee, H. Y.

AU - Chang, Y. C.

AU - Hong, Chon Kit

AU - Ou, Y. R.

AU - Kuo, C. N.

AU - Lue, C. S.

PY - 2022/11/15

Y1 - 2022/11/15

N2 - We have applied Al27 nuclear magnetic resonance (NMR) spectroscopy to investigate the iron-based aluminide of BaFe2Al9. This material has been a subject of current interest due to indications of charge density wave behavior below the transition temperature TC≃100 K. Two sets of the Al27 NMR resonance lines that are associated with two nonequivalent crystallographic aluminum sites have been well resolved. We have discussed the obtained electric field gradient and anisotropic Knight shift for each individual aluminum site, revealing the strong ab plane bonding configuration for the structural properties of BaFe2Al9. Pronounced features in the isotropic Knight shift and nuclear spin-lattice relaxation rate have been observed in the vicinity of TC. Furthermore, the detailed Al27 NMR analyses have provided evidence for the decrease of the electronic density of states upon lowering temperature below TC.

AB - We have applied Al27 nuclear magnetic resonance (NMR) spectroscopy to investigate the iron-based aluminide of BaFe2Al9. This material has been a subject of current interest due to indications of charge density wave behavior below the transition temperature TC≃100 K. Two sets of the Al27 NMR resonance lines that are associated with two nonequivalent crystallographic aluminum sites have been well resolved. We have discussed the obtained electric field gradient and anisotropic Knight shift for each individual aluminum site, revealing the strong ab plane bonding configuration for the structural properties of BaFe2Al9. Pronounced features in the isotropic Knight shift and nuclear spin-lattice relaxation rate have been observed in the vicinity of TC. Furthermore, the detailed Al27 NMR analyses have provided evidence for the decrease of the electronic density of states upon lowering temperature below TC.

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Al 27 NMR insight into the phase transition in BaFe2Al9

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