The phase diagram of Sr3Ru2O7 contains a metamagnetic transition that bifurcates to enclose an anomalous phase with intriguing properties - a large resistivity with anisotropy that breaks the crystal-lattice symmetry. We propose that this is a magnetic analogue of the spatially inhomogeneous superconducting Fulde-Ferrell-Larkin-Ovchinnikov state. Based on a microscopic theory of Stoner magnetism we derive a Ginzburg-Landau expansion where the magnetisation transverse to the applied field can become spatially inhomogeneous. We show that this reproduces the observed phase diagram of Sr3Ru2O7.
@article{arxiv.0910.0612,
title = {Magnetic analogue of the LOFF phase in Sr3Ru2O7},
author = {A. M. Berridge and S. A. Grigera and B. D. Simons and A. G. Green},
journal= {arXiv preprint arXiv:0910.0612},
year = {2010}
}
Comments
20 pages, 16 figures; revisions to text and figures