Spin fluctuations with two-dimensional XY behavior in a frustrated S = 1/2 square-lattice ferromagnet

Abstract

The spin dynamics of the layered square-lattice vanadate Pb2VO(PO4)2 is investigated by electron spin resonance at various magnetic fields and at temperatures above magnetic ordering. The linewidth divergence towards low temperatures seems to agree with isotropic Heisenberg-type spin exchange suggesting that the spin relaxation in this quasi-two dimensional compound is governed by low-dimensional quantum fluctuations. However, a weak easy- plane anisotropy of the g factor points to the presence of a planar XY type of exchange. Indeed, we found that the linewidth divergence is described best by XY-like spin fluctuations which requires a single parameter only. Therefore, ESR-probed spin dynamics could establish Pb2VO(PO4)2 as the first frustrated square lattice system with XY-inherent spin topological fluctuations.

arXiv comment5 pages, 3 figures

References in corpus (12)

• Spin Ice State in Frustrated Magnetic Pyrochlore Materials
• Finite temperature properties and frustrated ferromagnetism in a square lattice Heisenberg model
• Exploring the spin-1/2 frustrated square lattice model with high-field magnetization measurements
• Magnetocaloric effect in the frustrated square lattice J1-J2 model
• Single Crystal 31P NMR Studies of the Frustrated Square Lattice Compound Pb2(VO)(PO4)2
• Detection of XY behaviour in weakly anisotropic quantum antiferromagnets on the square lattice
• The Two-Dimensional Square-Lattice S=1/2 Antiferromagnet Cu(pz)${}_2$(ClO${}_4$)${}_2$
• Field-induced XY behavior in the S=1/2 antiferromagnet on the square lattice
• Spin correlations and exchange in square lattice frustrated ferromagnets
• Fluctuations and correlations in a frustrated S=1/2 square lattice with competing ferromagnetic and antiferromagnetic interactions: a muSR study
• Experimental realization of field-induced XY and Ising ground states in a quasi-2D S=1/2 Heisenberg antiferromagnet
• Charge Order in NaV2O5 studied by EPR

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