Eu$_{0.5}$Sr$_{1.5}$MnO$_4$: a three-dimensional XY spin glass

Details Eu$_{0.5}$Sr$_{1.5}$MnO$_4$: a three-dimensional XY spin glass Eu$_{0.5}$Sr$_{1.5}$MnO$_4$: a three-dimensional XY spin glass

2005-07-16

arxiv.org/abs/cond-mat/0507389v1

Phys. Rev. B 72, 014436 (2005).

Physics

Condensed Matter

Materials Science

REVTeX 4 style; 5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.72.014436

The frequency, temperature, and dc-bias dependence of the ac-susceptibility of a high quality single crystal of the Eu$_{0.5}$Sr$_{1.5}$MnO$_4$ layered manganite is investigated. Eu$_{0.5}$Sr$_{1.5}$MnO$_4$ behaves like a XY spin glass with a strong basal anisotropy. Dynamical and static scalings reveal a three-dimensional phase transition near $T_g$ = 18 K, and yield critical exponent values between those of Heisenberg- and Ising-like systems, albeit slightly closer to the Ising case. Interestingly, as in the latter system, the here observed rejuvenation effects are rather weak. The origin and nature of the low temperature XY spin glass state is discussed.

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