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Exchange anisotropy as mechanism for spin-stripe formation in frustrated spin chains

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arxiv 1608.04495 v2 pith:DFNZZ2HW submitted 2016-08-16 cond-mat.str-el

Exchange anisotropy as mechanism for spin-stripe formation in frustrated spin chains

classification cond-mat.str-el
keywords frustratedspin-stripeanisotropyexchangeformationmagneticmechanismspin
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We investigate the spin-stripe mechanism responsible for the peculiar nanometer modulation of the incommensurate magnetic order that emerges between the vector-chiral and the spin-density-wave phase in the frustrated zigzag spin-1/2 chain compound $\beta$-TeVO$_4$. A combination of magnetic-torque, neutron-diffraction and spherical-neutron-polarimetry measurements is employed to determine the complex magnetic structures of all three ordered phases. Based on these results, we develop a simple phenomenological model, which exposes the exchange anisotropy as the key ingredient for the spin-stripe formation in frustrated spin systems.

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