Honor

Triangular Magnet Emergent from Noncentrosymmetric Sr0.94Mn0.86Te1.14O6 Single Crystals

Post Date:2022-11-30

Dr. Raman Sankar and his group, in collaboration with research groups in the Republic of Korea, Prof. Kwang-Yong Choi at Sungkyunkwan University and Prof. Vladimir B. Nalbandyan at Southern Federal University (Russia), report the successful growth of high-quality single crystals of Sr0.94Mn0.86Te1.14O6 (SMTO) using a self-flux method. The structural, electronic, and magnetic properties of SMTO are investigated by neutron powder diffraction (NPD), single-crystal X-ray diffraction (SCXRD), thermodynamic, and nuclear magnetic resonance techniques in conjunction with density functional theory calculations. The previously reported P6̅2m structure of SrMnTeO6 with cations in prismatic coordination has been revised using NPD and SCXRD. NPD unambiguously determined octahedral (trigonal antiprismatic) coordination for all cations with the chiral space group P312 (no. 149), which is further confirmed by SCXRD data. The magnetic susceptibility and specific heat data evidence a weak antiferromagnetic order at TN = 6.6 K. The estimated Curie−Weiss temperature θCW = −21 K indicates antiferromagnetic interaction between Mn-ions. Furthermore, both the magnetic entropy and the 125Te nuclear spin-lattice relaxation rate showcase that short range spin correlations persist well above the Néel temperature. Our work demonstrates that Sr0.94(2)Mn0.86(3)Te1.14(3)O6 single crystals realize a noncentrosymmetric triangular antiferromagnet.

https://www.phys.sinica.edu.tw/files/bpic20221130040110pm_圖片 1.png

PDF File Download

WebSite: https://pubs.acs.org/doi/10.1021/acs.inorgchem.2c01585?ref=PDF

Back To Top