&lt;em&gt;μ&lt;/em&gt;&lt;sup&gt;+&lt;/sup&gt;SR study on ferromagnetic hollandite K&lt;sub&gt;2&lt;/sub&gt;Cr&lt;sub&gt;8&lt;/sub&gt;O&lt;sub&gt;16&lt;/sub&gt; and Rb&lt;sub&gt;2&lt;/sub&gt;Cr&lt;sub&gt;8&lt;/sub&gt;O&lt;sub&gt;16&lt;/sub&gt;

Sugiyama, Jun; Nozaki, Hiroshi; Månsson, Martin; Prša, Krunoslav; Andreica, Daniel; Amato, Alex; Isobe, Masahiko; Ueda, Yutaka

doi:10.1103/PhysRevB.85.214407

μ⁺SR study on ferromagnetic hollandite K₂Cr₈O₁₆ and Rb₂Cr₈O₁₆

Sugiyama J, Nozaki H, Månsson M, Prša K, Andreica D, Amato A, Isobe M & Ueda Y

Citation

Sugiyama, J., Nozaki, H., Månsson, M., Prša, K., Andreica, D., Amato, A., … Ueda, Y. (2012). μ⁺SR study on ferromagnetic hollandite K₂Cr₈O₁₆ and Rb₂Cr₈O₁₆. Physical Review B, 85(21), 214407 (8 pp.). https://doi.org/10.1103/PhysRevB.85.214407

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:12520

The magnetism of a quasi-one-dimensional ferromagnetic (FM) compound, K₂Cr₈O₁₆, has been investigated by muon-spin rotation and relaxation (μ⁺SR) using a powder sample in the temperature range between 2 and 225 K. Below T_c = 163 K, muon-spin precession signals were clearly observed in the zero-field spectrum, indicating the formation of static FM order. It was also found that the internal field does not change drastically at the metal-to-insulator transition temperature, T_MI ∼ 100 K. Electrostatic potential calculations and dipole field calculations suggested that FM order is not parallel to the [100], [010], [001], and [110] directions but likely parallel to the [101], [011], and/or [111] directions. A very similar result was obtained for a related compound, Rb₂Cr₈O₁₆, while itsT_c is 254 K.