Journal Article

FZJ-2018-00197

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Investigation of the spin-1 honeycomb antiferromagnet $BaNi_2 V_ 2 O_ 8$ with easy-plane anisotropy

Klyushina, E. S. (Corresponding author) ; Lake, B. ; Islam, A. T. M. N. ; Park, J. T. ; Schneidewind, A.FZJ* ; Guidi, T. ; Goremychkin, E. A. ; Klemke, B. ; Månsson, M.

2017
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/16585  doi:10.1103/PhysRevB.96.214428

Abstract: 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.

Keyword(s): Basic research (1st) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
2. Streumethoden (JCNS-2)

Research Program(s):

1. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. PANDA: Cold three axes spectrometer (SR2)
2. PUMA: Thermal three axes spectrometer (SR7)

Appears in the scientific report 2017

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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