Intermediate field-induced phase of the honeycomb magnet BaCo2⁢(AsO4)2

  • We use magnetometry, calorimetry, and high-resolution capacitive dilatometry, as well as single-crystal neutron diffraction to explore the temperature-field phase diagram of the anisotropic honeycomb magnet BaCo2⁢(AsO4)2. Our data reveal four distinct ordered states observed for in-plane magnetic fields. Of particular interest is the narrow region between 0.51 and 0.54 T that separates the up-up-down order from the fully polarized state and coincides with the field range where signatures of the spin-liquid behavior have been reported. We show that magnetic Bragg peaks persist in this intermediate phase, thus ruling out its spin-liquid nature. However, the simultaneous nonmonotonic evolution of nuclear Bragg peaks suggests the involvement of the lattice, witnessed also in other regions of the phase diagram where large changes in the sample length are observed upon entering the magnetically ordered states. Our data highlight the importance of lattice effects in BaCo2⁢(AsO4)2.

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Metadaten
Author:Prashanta K. Mukharjee, Bin Shen, Sebastian Erdmann, Anton JescheORCiDGND, Julian Kaiser, Priya R. Baral, Oksana Zaharko, Philipp GegenwartORCiDGND, Alexander A. TsirlinORCiDGND
URN:urn:nbn:de:bvb:384-opus4-1162438
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/116243
ISSN:2469-9950OPAC
ISSN:2469-9969OPAC
Parent Title (English):Physical Review B
Publisher:American Physical Society (APS)
Type:Article
Language:English
Year of first Publication:2024
Publishing Institution:Universität Augsburg
Release Date:2024/10/29
Volume:110
Issue:14
First Page:L140407
DOI:https://doi.org/10.1103/physrevb.110.l140407
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik VI
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):Deutsches Urheberrecht