TY  - JOUR
AU  - Klyushina, E. S.
AU  - Lake, B.
AU  - Islam, A. T. M. N.
AU  - Park, J. T.
AU  - Schneidewind, A.
AU  - Guidi, T.
AU  - Goremychkin, E. A.
AU  - Klemke, B.
AU  - Månsson, M.
TI  - Investigation of the spin-1 honeycomb antiferromagnet $BaNi_2 V_ 2 O_ 8$ with easy-plane anisotropy
JO  - Physical review / B
VL  - 96
IS  - 21
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2018-00197
SP  - 214428
PY  - 2017
AB  - The magnetic properties of the two-dimensional, S = 1 honeycomb antiferromagnet BaNi2V2O8 have beencomprehensively studied using dc susceptibility measurements and inelastic neutron scattering techniques. Themagnetic excitation spectrum is found to be dispersionlesswithin experimental resolution between the honeycomblayers, while it disperses strongly within the honeycomb plane where it consists of two gapped spin-wave modes.The magnetic excitations are compared to linear spin-wave theory allowing the Hamiltonian to be determined.The first- and second-neighbor magnetic exchange interactions are antiferromagnetic and lie within the ranges10.90 meV  Jn  13.35 meV and 0.85 meV  Jnn  1.65 meV, respectively. The interplane coupling Jout isfour orders of magnitude weaker than the intraplane interactions, confirming the highly two-dimensionalmagneticbehavior of this compound. The sizes of the energy gaps are used to extract the magnetic anisotropies and revealsubstantial easy-plane anisotropy and a very weak in-plane easy-axis anisotropy. Together these results revealthat BaNi2V2O8 is a candidate compound for the investigation of vortex excitations and Berezinsky-Kosterliz-Thouless phenomenon.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000418572500003
DO  - DOI:10.1103/PhysRevB.96.214428
UR  - https://juser.fz-juelich.de/record/841900
ER  -