Role of Antisymmetric Exchange in Selecting Magnetic Chirality in Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$

Abstract

We present electron spin resonance (ESR) investigation of the acentric \FeLang, featuring a unique single-domain double-chiral magnetic ground state. Combining simulations of the ESR line-width anisotropy and the antiferromagnetic-resonance modes allows us to single out the Dzyaloshinsky-Moriya (DM) interaction as the leading magnetic anisotropy term. We demonstrate that the rather minute out-of-plane DM component $d_c=45$ mK is responsible for selecting a unique ground state, which endures thermal fluctuations up to astonishingly high temperatures.

4+ pages, 4 figures, 3+ pages of supplementary information with 2 additional figures, accepted for publication in PRL

References in corpus (8)

• Spin chirality on a two-dimensional frustrated lattice
• Quantum phase transition induced by Dzyaloshinskii-Moriya in the kagome antiferromagnet
• Dzyaloshinsky-Moriya Anisotropy in the Spin-1/2 Kagomé Compound ZnCu${}_3$(OH)${}_6$Cl${}_2$
• Spin waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2
• Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14
• Parity Broken Chiral Spin Dynamics in Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Unconventional Magnetism in a Nitrogen-Based Analogue of Cupric Oxide
• Ising phases of Heisenberg ladders in a magnetic field

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• Experimental signatures of quantum and topological states in frustrated magnetism
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• Dzyaloshinsky-Moriya driven helical-butterfly structure in Ba3NbFe3Si2O14
• Effect of divalent Ba cation substitution with Sr on coupled multiglass state in the magnetoelectric multiferroic compound Ba3NbFe3Si2O14
• Magnetic Control of Ferroelectric Polarization in a Self-formed Single Magnetoelectric Domain of Multiferroic Ba3NbFe3Si2O14
• Helical bunching and symmetry lowering inducing multiferroicity in Fe langasites
• Multiferroic FeTe${}_2$O${}_5$Br: Alternating spin chains with frustrated interchain interactions
• U(1) symmetry of the spin-orbit coupled Hubbard model on the Kagome lattice
• Quantum interference oscillations of the superparamagnetic blocking in an Fe8 molecular nanomagnet
• Spin-wave directional anisotropies in antiferromagnetic Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$
• Magnetic particles and strings in iron langasite
• Anomalous Hall effect in the coplanar antiferromagnetic coloring-triangular lattice
• Universal fluctuating regime in triangular chromate antiferromagnets