NMR study on the quasi-one dimensional antiferromagnet BaCo2Si2O7

8th International Conference on Highly Frustrated Magnetism 2016

Uesugi, R.^1 ; Akaki, M.^2 ; Hagiwara, M.^2 ; Kuwahara, H.^1 ; Goto, T.^1

Physics Division, Sophia University, 7-1 Kioicho, Chiyodaku Tokyo

102-8551, Japan^1

Center for Advanced High Field Science, Graduate School of Science, Osaka University, Osaka, Toyonaka

560-8531, Japan^2

关键词: Antiferromagnets;    Easy axis;    Hyperfine field;    Magnetically ordered state;    NMR spectrum;    NMR studies;    Quasi-one dimensional;    Split peak;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/828/1/012015/pdf
DOI  :  10.1088/1742-6596/828/1/012015

来源: IOP

【 摘 要 】

NMR study has been performed on the quasi-one dimensional antiferromagnet BaCo2Si2O7, in which three inequivalent CoO4tetrahedra, slightly tilted from one another, are linked at vertices to form a chain along the easy-axis c. In its magnetically ordered state at 3.6 K,59Co-NMR spectra were measured in the field region up to 12 T. From the observed three distinct sets of quadrupolar-split peak groups, three different hyperfine fields at Co sites were determined. They are slightly tilted from c-axis and are all different both in magnitude and direction, which is in agreement with the non-collinear magnetic structure.