Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$

Simon Bettler; Florian Landolt; Ömer M. Aksoy; Zewu Yan; Severian Gvasaliya; Yiming Qiu; Eric Ressouche; Ketty Beauvois; Stéphane Raymond; Alexey N. Ponomaryov; Sergei A. Zvyagin; Andrey Zheludev

doi:10.1103/PhysRevB.99.184437

Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$

Strongly Correlated Electrons 2020-03-12 v3

Authors: Simon Bettler , Florian Landolt , Ömer M. Aksoy , Zewu Yan , Severian Gvasaliya , Yiming Qiu , Eric Ressouche , Ketty Beauvois , Stéphane Raymond , Alexey N. Ponomaryov , Sergei A. Zvyagin , Andrey Zheludev

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Abstract

Single crystal neutron diffraction, inelastic neutron scattering and electron spin resonance experiments are used to study the magnetic structure and spin waves in Pb $_2$ VO(PO $_4$ ) $_2$ , a prototypical layered $S=1/2$ ferromagnet with frustrating next nearest neighbor antiferromagnetic interactions. The observed excitation spectrum is found to be inconsistent with a simple square lattice model previously proposed for this material. At least four distinct exchange coupling constants are required to reproduce the measured spin wave dispersion. The degree of magnetic frustration is correspondingly revised and found to be substantially smaller than in all previous estimates.

Keywords

magnetic structure spin waves frustrated ferromagnet pb2vo(po4)2 exchange coupling neutron diffraction

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@article{arxiv.1902.11172,
  title  = {Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$},
  author = {Simon Bettler and Florian Landolt and Ömer M. Aksoy and Zewu Yan and Severian Gvasaliya and Yiming Qiu and Eric Ressouche and Ketty Beauvois and Stéphane Raymond and Alexey N. Ponomaryov and Sergei A. Zvyagin and Andrey Zheludev},
  journal= {arXiv preprint arXiv:1902.11172},
  year   = {2020}
}

Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$

Abstract

Keywords

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