High pressure μSR study on cobalt oxide spinel

Ikedo, Yutaka; Sugiyama, Jun; Nozaki, Hiroshi; Mukai, Kazuhiko; Itahara, Hiroshi; Russo, Peter L.; Andreica, Daniel; Amato, Alex

doi:10.1016/j.physb.2008.11.105

High pressure μSR study on cobalt oxide spinel

Ikedo Y, Sugiyama J, Nozaki H, Mukai K, Itahara H, Russo PL, Andreica D & Amato A

Citation

Ikedo, Y., Sugiyama, J., Nozaki, H., Mukai, K., Itahara, H., Russo, P. L., … Amato, A. (2009). High pressure μSR study on cobalt oxide spinel. Physica B: Condensed Matter, 404(5-7), 652-655. https://doi.org/10.1016/j.physb.2008.11.105

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:17317

The magnetic nature of the cobalt oxide spinel Co₃O₄ has been studied under hydrostatic pressure up to 1.34 GPa by means of zero field (ZF) and weak transverse field (wTF) μ⁺SR techniques using a polycrystalline sample. At ambient pressure, Co₃O₄ enters into an antiferromagnetic (AF) phase below 30 K, as evidenced by two distinct spontaneous muon-spin precessions in its ZF spectrum. wTF measurements show that AF transition temperature (T_N) clearly increases with increasing pressure. Since only the Co²⁺ ions at the tetrahedral site (A site) in the spinel lattice are magnetic, this indicates that the AF interaction between the Co²⁺ ions at A site is enhanced by applying pressure through the decrease in the distance between the adjacent A-site ions. On the other hand, ZF measurements show that the frequency of spontaneous muon-spin precession is almost independent of pressure. This could suggest that the AF structure is not altered by pressure at least up to 1.34 GPa.