Calorimetric determination of the angular dependent phase diagram of an S=1/2 Heisenberg triangular-lattice antiferromagnet

27th International Conference on Low Temperature Physics

Hannahs, S.T.^1 ; Fortune, N.A.^2 ; Park, J.-H.^1 ; Takano, Y.^3 ; Ono, T.^4 ; Tanaka, H.^5

National High Magnetic Field Laboratory, Tallahassee

FL, United States^1

Department of Physics, Smith College, Northampton

MA, United States^2

Department of Physics, University of Florida, Gainesville

FL, United States^3

Department of Physics, Osaka Prefecture University, Osaka, Japan^4

Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan^5

关键词: Antiferromagnetic systems;    Complete coverages;    Experimental parameters;    Experimental realizations;    Magnetic transitions;    Theoretical investigations;    Triangular lattice;    Triangular lattice antiferromagnet;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/568/4/042010/pdf
DOI  :  10.1088/1742-6596/568/4/042010

来源: IOP

【 摘 要 】

An antiferromagnetic system on a 2-D triangular lattice leads to geometric topological frustration. This ideal system has been the subject of theoretical investigations. One experimental realization of this system is the compound Cs2CuCl4. Various magnetization, heat capacity, neutron scattering and NMR studies have identified several magnetic transitions when the magnetic field is applied along one of the three principal axes. The current work investigates the evolution of these phases at intermediate angles as the crystal is rotated relative to the magnetic field. These phases were investigated using a novel rotating calorimeter allowing complete coverage of the experimental parameter space. New magnetic phases only existing at intermediate angles have been found.