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; Chia-Nung 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, Chia-Nung Kuo, C. S. Lue

物理學系

研究成果: Article › 同行評審

摘要

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.

原文	English
文章編號	195101
期刊	Physical Review B
卷	106
發行號	19
DOIs	https://doi.org/10.1103/PhysRevB.106.195101
出版狀態	Published - 2022 11月 15

All Science Journal Classification (ASJC) codes

電子、光磁材料
凝聚態物理學

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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 Chia-Nung Kuo and Lue, {C. S.}",

note = "Funding Information: This work is supported by the National Science and Technology Council of Taiwan under Grants No. 109-2112-M-006-013, No. 110-2124-M-006-006, and No. 110-2124-M-006-010. The authors are grateful to L. J. Chang of National Chen Kung University for the help with operating the Laue diffraction spectrometer. We gratefully acknowledge M. K. Lee for the magnetic susceptibility measurement. We also thank S. Y. Sun for the help with performing the NMR spectroscopy measurement at the Core Facility Center of National Cheng Kung University under Grant No. 110-2731-M-006-001. Publisher Copyright: {\textcopyright} 2022 American Physical Society. ",

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AU - Huang, C. Y.

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AU - Ou, Y. R.

AU - Kuo, Chia-Nung

AU - Lue, C. S.

N1 - Funding Information: This work is supported by the National Science and Technology Council of Taiwan under Grants No. 109-2112-M-006-013, No. 110-2124-M-006-006, and No. 110-2124-M-006-010. The authors are grateful to L. J. Chang of National Chen Kung University for the help with operating the Laue diffraction spectrometer. We gratefully acknowledge M. K. Lee for the magnetic susceptibility measurement. We also thank S. Y. Sun for the help with performing the NMR spectroscopy measurement at the Core Facility Center of National Cheng Kung University under Grant No. 110-2731-M-006-001. Publisher Copyright: © 2022 American Physical Society.

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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