A quest for frustration driven distortion in Y2Mo2O7
Eva Sagi, Oren Ofer, Amit Keren, and Jason S. Gardner
TL;DR
This study explores the magnetic freezing in Y2Mo2O7, revealing evidence of lattice deformation influencing spin-glass behavior through muSR measurements and numerical simulations.
Contribution
It introduces the role of frustration-driven lattice distortion in the spin-glass transition of Y2Mo2O7, supported by experimental and simulation data.
Findings
Evidence of lattice deformation above Tg
Inadequacy of spin susceptibility alone to explain data
Magneto-elastic coupling influences spin-glass behavior
Abstract
We investigated the nature of the freezing in the geometrically frustrated Heisenberg spin-glass Y2Mo2O7 by measuring the temperature dependence of the static internal magnetic field distribution above the spin-glass temperature, Tg, using the muSR technique. The evolution of the field distribution cannot be explained by changes in the spin susceptibility alone and suggests a lattice deformation. This possibility is addressed by numerical simulations of the Heisenberg Hamiltonian with magneto-elastic coupling at T>0.
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