Absolute crystal and magnetic chiralities in the langasite compound Ba3NbFe3Si2O14 determined by polarized neutron and x-ray scattering

Qureshi, N.; Bombardi, A.; Picozzi, S.; Barone, P.; Lelièvre-Berna, E.; Xu, X.; Stock, C.; McMorrow, D. F.; Hearmon, A.; Fabrizi, F.; Radaelli, P. G.; Cheong, S.-W.; Chapon, L. C.

doi:10.1103/physrevb.102.054417

Absolute crystal and magnetic chiralities in the langasite compound Ba₃NbFe₃Si₂O₁₄ determined by polarized neutron and x-ray scattering

Journal Article · Wed Aug 12 00:00:00 EDT 2020 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.102.054417· OSTI ID:1800462

Qureshi, N. ^[1]; Bombardi, A. ^[2]; Picozzi, S. ^[3]; ^[3]; ^[4]; Xu, X. ^[5]; Stock, C. ^[6]; McMorrow, D. F. ^[7]; ^[8]; Fabrizi, F. ^[8]; Radaelli, P. G. ^[8]; Cheong, S.-W. ^[5]; Chapon, L. C. ^[9]

Inst. Laue-Langevin (ILL), Grenoble (France); OSTI
Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
Consiglio Nazionale Delle Ricerche (Italy). Istituto SPIN (CNR-SPIN); Universitá G. d’Annunzio, Chieti (Italy)
Inst. Laue-Langevin (ILL), Grenoble (France)
Rutgers Univ., Piscataway, NJ (United States)
Univ. of Edinburgh, Scotland (United Kingdom)
Univ. College London (United Kingdom)
Univ. of Oxford (United Kingdom). Clarendon Lab.
Inst. Laue-Langevin (ILL), Grenoble (France); Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.

Here, we present a combined polarized neutron and x-ray scattering study on two enantiopure langasite single crystals aimed at the determination of their absolute structural and magnetic chiralities and the coupling between them. Our respective data sets unambiguously reveal two samples of opposite structural chirality, where the magnetic handedness is pinned by the structural one. Simple energy considerations of the magnetic exchange and single-ion anisotropy parameters reveal that it is not the Dzyaloshinskii-Moriya interaction but the local single-ion anisotropy on a triangular plaquette which plays a key role in stabilizing one of the two magnetic helices.

View Accepted Manuscript (DOE)

Research Organization:: Rutgers Univ., Piscataway, NJ (United States)

Sponsoring Organization:: Engineering and Physical Sciences Research Council (EPSRC); USDOE Office of Science (SC)

Grant/Contract Number:: FG02-07ER46382

OSTI ID:: 1800462

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 5 Vol. 102; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Absolute crystal and magnetic chiralities in the langasite compound Ba3NbFe3Si2O14 determined by polarized neutron and x-ray scattering

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