Magnetic Structure and Spin Waves in the Frustrated Ferro-Antiferro Magnet Pb2VO(PO4)2

Published

May 28, 2019

Author(s)

S. Bettler, F. Landolt, O. M. Aksoy, Z. Yan, S. Gvasaliya, Yiming Qiu, E. Ressouche, K. Beauvois, S. Raymond, A. N. Ponomaryov, S. A. Zvyagin, A. Zheludev

Abstract

Single crystal neutron diffraction, inelastic neutron scattering and electron spin resonance experiments are used to study the magnetic structure and spin waves in Pb₂VO(PO₄)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.

Citation

Physical Review B

Volume

99

Issue

18

Pub Type

Journals

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Keywords

spin wave, frustrated square lattice, ferromagnet

Citation

Bettler, S. , Landolt, F. , Aksoy, O. , Yan, Z. , Gvasaliya, S. , Qiu, Y. , Ressouche, E. , Beauvois, K. , Raymond, S. , Ponomaryov, A. , Zvyagin, S. and Zheludev, A. (2019), Magnetic Structure and Spin Waves in the Frustrated Ferro-Antiferro Magnet Pb₂VO(PO₄)₂, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927668 (Accessed April 8, 2025)