Slow spin relaxation in a highly polarized cooperative paramagnet

B. G. Ueland, G. C. Lau, R. J. Cava, J. R. O'Brien, P. Schiffer

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


We report measurements of the ac susceptibility of the cooperative paramagnet Tb2Ti2O7 in a strong magnetic field. Our data show the expected saturation maximum in χ(T) and also an unexpected frequency dependence of this peak at low frequencies (<1Hz), suggesting very slow spin relaxations are occurring. Measurements on samples diluted with nonmagnetic Y3+ or Lu3+ and complementary measurements on pure and diluted Dy2Ti2O7 strongly suggest that the relaxation is associated with dipolar spin correlations, representing unusual cooperative behavior in a paramagnetic system.

Original languageEnglish (US)
Article number027216
JournalPhysical review letters
Issue number2
StatePublished - Jan 20 2006

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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