Nuclear-Magnetic-Resonance Properties of the Staircase Kagomé Antiferromagnet $PbCu_3TeO_7$

doi:10.1088/0256-307X/32/12/127503

Chin. Phys. Lett.

2015, Vol. 32

Issue (12): 127503 DOI: 10.1088/0256-307X/32/12/127503

CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES

Nuclear-Magnetic-Resonance Properties of the Staircase Kagomé Antiferromagnet $PbCu_3TeO_7$

DAI Jia¹, WANG Peng-Shuai¹, SUN Shan-Shan¹, PANG Fei¹, ZHANG Jin-Shan², DONG Xiao-Li³, YUE Gen³, JIN Kui³, CONG Jun-Zhuang³, Sun Yang³, YU Wei-Qiang^1**

¹Department of Physics, Renmin University of China, Beijing 100872
²School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206
³Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190

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DAI Jia, WANG Peng-Shuai, SUN Shan-Shan et al 2015 Chin. Phys. Lett. 32 127503

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Abstract

We report the first nuclear magnetic resonance (NMR) study on single crystals of staircase Kagomé antiferromagnet PbCu₃TeO₇ (T_N₁∼36 K). A Curie constant Θ ∼−140 K is obtained by a Curie–Weiss fit to the high-temperature Knight shift of ¹²⁵Te. The hyperfine coupling constant is estimated to be ¹²⁵A_hf=−67 kOe/μ_B, and a strong interlayer coupling among staircase Kagomé planes is suggested with such a large hyperfine coupling, according to the lattice structure. The ^{63, 65}Cu NMR spectra are found by the zero-field (ZF) NMR at T=2 K, and the internal hyperfine fields are estimated to be 10.3 T and 9.6 T, for Cu(1) and Cu(2) sites, respectively, in the lattice. A second type of ZF NMR signal with a large rf enhancement is also seen after field-cycling through a high magnetic field.

Received: 25 July 2015 Published: 05 January 2016

PACS:	75.10.Jm	(Quantized spin models, including quantum spin frustration)
	76.60.-k	(Nuclear magnetic resonance and relaxation)

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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/12/127503 OR https://cpl.iphy.ac.cn/Y2015/V32/I12/127503

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	DAI Jia
	WANG Peng-Shuai
	SUN Shan-Shan
	PANG Fei
	ZHANG Jin-Shan
	DONG Xiao-Li
	YUE Gen
	JIN Kui
	CONG Jun-Zhuang
	Sun Yang
	YU Wei-Qiang

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