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Spin-cluster effects and frustration in the uniaxial spin glass Fe2−xTi1+xO5 |
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| Authors: | C. Boekema I. M. Suarez J. C. Lam T. J. Hoffman E. N. La Joie S. F. Weathersby J. A. Flint R. L. Lichti C. P. Wang D. W. Cooke |
| Affiliation: | (1) Physics Department, San Jose State University, 95192 San Jose, CA, USA;(2) Texas Tech University, Lubbock, TX, USA;(3) Los Alamos National Laboratory, Los Alamos, NM, USA |
| Abstract: | Transverse-field (TF) muon-spin-relaxation (μSR) and Mössbauer experiments on the uniaxial insulating spin glass Fe2?xTi1+xO5 (x=0.25) have been performed near and below the spin-glass temperature (T g). The effect of a transverse field on the spin-freezing process and spin-glass state has been investigated by measuring the field-and temperature-dependencies of the μSR parameters. Spin-cluster effects signaled by anomalous μ-spin relaxation have been observed in a temperature region just aboveT g. An interpretation supported by recently developed theoretical models addressing non-linear relaxation in an intermediate Griffiths phase is offered. |
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