Slow spin relaxation in a highly polarized cooperative paramagnet

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

doi:10.1103/PhysRevLett.96.027216

Slow spin relaxation in a highly polarized cooperative paramagnet

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

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Abstract

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 language	English (US)
Article number	027216
Journal	Physical review letters
Volume	96
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.96.027216
State	Published - Jan 20 2006

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.96.027216

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abstract = "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.",

author = "Ueland, {B. G.} and Lau, {G. C.} and Cava, {R. J.} and O'Brien, {J. R.} and P. Schiffer",

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T1 - Slow spin relaxation in a highly polarized cooperative paramagnet

AU - Ueland, B. G.

AU - Lau, G. C.

AU - Cava, R. J.

AU - O'Brien, J. R.

AU - Schiffer, P.

PY - 2006/1/20

Y1 - 2006/1/20

N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevLett.96.027216

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VL - 96

JO - Physical review letters

JF - Physical review letters

IS - 2

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Slow spin relaxation in a highly polarized cooperative paramagnet

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