| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Spin correlations in the S=1 armchair chain Ni2NbBO6 as seen from NMR |
| Kai-Yue Zeng(曾凯悦)1,2, Long Ma(马龙)1,†, Long-Meng Xu(徐龙猛)3, Zhao-Ming Tian(田召明)3,‡, Lang-Sheng Ling(凌浪生)1, and Li Pi(皮雳)1,2,§ |
| 1 Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China; 2 Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China; 3 School of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China |
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Abstract We report our nuclear magnetic resonance (NMR) study on the structurally spin chain compound Ni2NbBO6 with complex magnetic coupling. The antiferromagnetic transition is monitored by the line splitting resulting from the staggered internal hyperfine field. The magnetic coupling configuration proposed by the first-principle density functional theory (DFT) is supported by NMR spectral analysis. For the spin dynamics, a prominent peak at T∼35 K well above the Néel temperature (T N∼20 K at μ0H=10 T) is observed from the spin-lattice relaxation data. As compared with the dc-susceptibility, this behavior indicates an antiferromagnetic coupling with the typical energy scale of ∼3 meV. Thus, the Ni2NbBO6 compound can be viewed as strongly ferromagnetically coupled armchair spin chains along the crystalline b-axis. These facts place strong constraints on the theoretical model for this compound.
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Received: 15 September 2020
Revised: 15 October 2020
Accepted manuscript online: 20 October 2020
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PACS:
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75.30.-m
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(Intrinsic properties of magnetically ordered materials)
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75.40.Gb
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(Dynamic properties?)
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76.60.-k
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(Nuclear magnetic resonance and relaxation)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0401802), the National Natural Science Foundation of China (Grant Nos. 11874057, 11504377, 11574288, 11874158, U1732273, and 21927814), and the Users with Excellence Program of Hefei Science Center CAS (Grant No. 2019HSC-UE008). A portion of this work was supported by the High Magnetic Field Laboratory of Anhui Province. |
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Corresponding Authors:
†Corresponding author. E-mail: malong@hmfl.ac.cn ‡Corresponding author. E-mail: tianzhaoming@hust.edu.cn §Corresponding author. E-mail: pili@ustc.edu.cn
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Cite this article:
Kai-Yue Zeng(曾凯悦), Long Ma(马龙), Long-Meng Xu(徐龙猛), Zhao-Ming Tian(田召明), Lang-Sheng Ling(凌浪生), and Li Pi(皮雳) Spin correlations in the S=1 armchair chain Ni2NbBO6 as seen from NMR 2021 Chin. Phys. B 30 047503
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