We report on an investigation into the dynamics of the stripe phase of La5/3Sr1/3CoO4, a material recently shown to have an hour-glass magnetic excitation spectrum. A combination of magnetic susceptibility, muon-spin relaxation and nuclear magnetic resonance measurements strongly suggest that the physics is determined by a disordered configuration of charge and spin stripes whose frustrated magnetic degrees of freedom are strongly dynamic at high temperature and which freeze out in a glassy manner as the temperature is lowered. Our results broadly confirm a recent theoretical prediction, but show that the charge quenching remains incomplete well below the charge ordering temperature and reveal, in detail, the manner in which the magnetic degrees of freedom are frozen.
@article{arxiv.1301.5124,
title = {Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO4},
author = {T. Lancaster and S. R. Giblin and G. Allodi and S. Bordignon and M. Mazzani and R. De Renzi and P. G. Freeman and P. J. Baker and F. L. Pratt and P. Babkevich and S. J. Blundell and A. T. Boothroyd and J. S. Moeller and D. Prabhakaran},
journal= {arXiv preprint arXiv:1301.5124},
year = {2017}
}
Comments
5 pages, 4 figures. (Revised data analysis, discussion and supplemental information is now included)