Quantum Phase Transition from a Spin-liquid State to a Spin-glass State in the Quasi-1D Spin-1 System Sr1-xCaxNi2V2O8

Abstract

We report a quantum phase transition from a spin-liquid state to a spin-glass state in the quasi-one dimensional (1D) spin-1 system Sr1-xCaxNi2V2O8, induced by a small amount of Ca-substitution at Sr site. The ground state of the parent compound (x = 0) is found to be a spin-liquid type with a finite energy gap of 26.6 K between singlet ground state and triplet excited state. Both dc-magnetization and ac-susceptibility studies on the highest Ca-substituted compound (x = 0.05) indicate a spin-glass type magnetic ground state. With increasing Ca-concentration, the spin-glass ordering temperature increases from 4.5 K (for the x = 0.015 compound) to 6.25 K (for the x = 0.05 compound). The observed results are discussed in the light of the earlier experimental reports and the theoretical predictions for a quasi-1D spin-1 system.

26 pages, 8 figures, 3 tables

References in corpus (6)

• Dynamics of coupled quantum spin chains
• Spin-Vacancy-Induced Long-Range Order in a New Haldane-Gap Antiferromagnet
• Magnetic excitations in coupled Haldane spin chains near the quantum critical point
• Continuum in the spin excitation spectrum of a Haldane chain, observed by neutron scattering in CsNiCl3
• Ordering in a spin glass under applied magnetic field
• Field-induced magnetic ordering in the Haldane system PbNi2V2O8

Cited by in corpus (10)

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• Li${}_2$RhO${}_3$: A spin-glassy relativistic Mott insulator
• Long-range and short-range magnetic correlations, and microscopic origin of net magnetization in the spin-1 trimer chain compound CaNi3P4O14
• Consequences of critical interchain couplings and anisotropy on a Haldane chain
• Low-energy magnetic excitations in the quasi-one-dimensional spin-1 chain compound SrNi2V2O8
• Synthesis and Characterization of Sodium Iron Antimonate Na2FeSbO5 One-Dimensional Antiferromagnetic Chain Compound with a Spin Glass Ground State
• Magnetic properties of the quasi-one-dimensional S = 1 spin chain antiferromagnet BaNiTe2O7
• Non-Abelian statistics in light scattering processes across interacting Haldane chains
• Magnetic excitations and exchange parameters of a nickel chain compound PbMn${}_2$Ni${}_6$Te${}_3$O${}_{18}$: Neutron scattering and density functional theory studies