Nuclear-Magnetic-Resonance Properties of the Staircase Kagome Antiferromagnet PbCu3TeO7

We report the first nuclear magnetic resonance （NMR） study on single crystals of staircase Kagome antiferromagnet PbCu3Te07 （TN1 -36K）. A Curie constant θ -140K is obtained by a Curie Weiss fit to the high- temperature Knight shift of 125 Te. The hyperfine coupling constant is estimated to be 125Ahf...

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Published in中国物理快报：英文版 no. 12; pp. 143 - 146
Main Author 代佳 王朋帅 孙珊珊 庞斐 张金珊 董晓莉 乐艮 金魁 丛君状 孙阳 于伟强
Format Journal Article
LanguageEnglish
Published 01.12.2015
Subjects
Weiss
共振特性
反铁磁晶体
层间耦合
核磁共振谱
楼梯
耦合常数
超精细场
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/32/12/127503

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Summary:We report the first nuclear magnetic resonance （NMR） study on single crystals of staircase Kagome antiferromagnet PbCu3Te07 （TN1 -36K）. A Curie constant θ -140K is obtained by a Curie Weiss fit to the high- temperature Knight shift of 125 Te. The hyperfine coupling constant is estimated to be 125Ahf = -67 kOe/#B, and a strong interlayer coupling among staircase Kagome planes is suggested with such a large hyperfine coupling, according to the lattice structure. The 63,65Cu 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 NMFt signal with a large rf enhancement is also seen after field-cycling through a high magnetic field.
Bibliography:We report the first nuclear magnetic resonance （NMR） study on single crystals of staircase Kagome antiferromagnet PbCu3Te07 （TN1 -36K）. A Curie constant θ -140K is obtained by a Curie Weiss fit to the high- temperature Knight shift of 125 Te. The hyperfine coupling constant is estimated to be 125Ahf = -67 kOe/#B, and a strong interlayer coupling among staircase Kagome planes is suggested with such a large hyperfine coupling, according to the lattice structure. The 63,65Cu 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 NMFt signal with a large rf enhancement is also seen after field-cycling through a high magnetic field.
11-1959/O4
DAI Jia, WANG Peng-Shuai, SUN Shan-Shan, PANG Fei, ZHANG Jin-Shan, DONG Xiao-Li, YUE Gen, JIN Zui, CONG Jun-Zhuang, Sun Yang, YU Wei-Qiang（1 Department of Physics, Renmin University of China, Beijing 100872 2School of Energy, Power and Mechanical Engineering, North China Electric Power University, Beijing 102206 3 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190）
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/12/127503