Static magnetic order in metallic triangular antiferromagnet Ag&lt;sub&gt;2&lt;/sub&gt;MnO&lt;sub&gt;2&lt;/sub&gt; detected by muon-spin spectroscopy

Sugiyama, Jun; Nozaki, Hiroshi; Ikedo, Yutaka; Mukai, Kazuhiko; Russo, Peter L.; Andreica, Daniel; Amato, Alex; Yoshida, Hiroaki; Hiroi, Zenji

doi:10.1103/PhysRevB.78.104427

Static magnetic order in metallic triangular antiferromagnet Ag₂MnO₂ detected by muon-spin spectroscopy

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

Citation

Sugiyama, J., Nozaki, H., Ikedo, Y., Mukai, K., Russo, P. L., Andreica, D., … Hiroi, Z. (2008). Static magnetic order in metallic triangular antiferromagnet Ag₂MnO₂ detected by muon-spin spectroscopy. Physical Review B, 78(10), 104427 (10 pp.). https://doi.org/10.1103/PhysRevB.78.104427

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:19124

The magnetic nature of the triangular antiferromagnet Ag₂MnO₂, which exhibits two magnetic transitions at T_m1∼80 K and T_m2∼30 K, has been studied with positive muon-spin rotation and relaxation (μ⁺SR) spectroscopy using a polycrystalline sample in the temperature (T) range between 300 and 1.8 K. Weak transverse-field μ⁺SR measurements suggest the appearance of a random internal magnetic field at T below T_m1, while zero-field (ZF) μ⁺SR measurements indicate the existence of static internal magnetic fields below T_m2. Furthermore, two components with ∼10 times different precession frequencies but almost equivalent amplitudes in the ZF spectrum indicate the formation of a static but complex antiferromagnetic order below T_m2. The overall magnetic behavior is therefore clarified that the disordered moments appear below T_m1=T_N^on, whereas static short-range antiferromagnetic order completes below T_m2=T_N^end.