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Phys. Rev. Lett. 94, 237202 (2005) [4 pages]

Quest for Frustration Driven Distortion in Y2Mo2O7

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Eva Sagi, Oren Ofer, and Amit Keren
Physics Department, Technion, Israel Institute of Technology, Haifa 32000, Israel

Jason S. Gardner
Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA and NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8562, USA

Received 22 March 2005; published 14 June 2005

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 muon spin relaxation 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 magnetoelastic coupling at T>0.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.237202
DOI:
10.1103/PhysRevLett.94.237202
PACS:
75.50.Lk, 75.10.Nr, 76.75.+i
 
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