Field-tuned magnetic structure and phase diagram of the honeycomb magnet YbCl_(3)

作者：YiQing Hao,HongLiang Wo,YiMeng Gu,XiaoWen Zhang,YiQing Gu,ShiYi Zheng,Yang Zhao,GuangYong Xu,Jeffrey WLynn,Kenji Nakajima,Naoki Murai,WenBin Wang,Jun Zhao

摘要：We report thermodynamic and neutron diffraction measurements on the magnetic ordering properties of the honeycomb lattice magnet YbCl_(3). We find YbCl_(3) exhibits a Ne′el type long-range magnetic order at the wavevector(0, 0, 0) below TN= 600 mK.This magnetic order is associated with a small sharp peak in heat capacity and most magnetic entropy release occurs above the magnetic ordering temperature. The magnetic moment lies in-plane, parallel to the monoclinic a-axis, whose magnitude mYb= 0.86(3) μBis considerably smaller than the expected fully ordered moment of 2.24 μBfor the doublet crystal-field ground state. The magnetic ordering moment gradually increases with increasing magnetic field perpendicular to the ab-plane, reaching a maximum value of 1.6(2) μBat 4 T, before it is completely suppressed above ~ 9 T. These results indicate the presence of strong quantum fluctuations in YbCl_(3).

发文机构：State Key Laboratory of Surface Physics and Department of Physics NIST Center for Neutron Research Department of Materials Science and Engineering J-PARC Center Institute of Nanoelectronic Devices and Quantum Computing Collaborative Innovation Center of Advanced Microstructures

关键词：magneticorderneutrondiffractionhoneycomblattice

分类号： TG1[金属学及工艺—金属学]