Muon spin relaxation study of the magnetism in unilluminated Prussian Blue analogue photomagnets

Z. Salman; T. J. Parolin; K. H. Chow; T. A. Keeler; R. I. Miller; D. Wang; W. A. MacFarlane

doi:10.1016/j.physb.2005.11.033

paper

Muon spin relaxation study of the magnetism in unilluminated Prussian Blue analogue photomagnets

arXiv:cond-mat/0511717 · doi:10.1016/j.physb.2005.11.033

Abstract

We present longitudinal field muon spin relaxation ( $μ$ SR) measurements in the unilluminated state of the photo-sensitive molecular magnetic Co-Fe Prussian blue analogues M $_{1 - 2 x}$ Co $_{1 + x}$ [Fe(CN) $_{6}$ ] $\cdot z$ H $_{2}$ O, where M=K and Rb with $x = 0.4$ and $≃ 0.17$ , respectively. These results are compared to those obtained in the $x = 0.5$ stoichiometric limit, Co $_{1.5}$ [Fe(CN) $_{6}$ ] $\cdot 6$ H $_{2}$ O, which is not photo-sensitive. We find evidence for correlation between the range of magnetic ordering and the value of $x$ in the unilluminated state which can be explained using a site percolation model.

7 pages, 12 figures