2003/11/30 by V. N. Glazkov, A. I. Smirnov, H. Tanaka +3
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Organic and Molecular Conductors Research #Physics of Superconductivity and Magnetism #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.69.184410
published as Physical Review B 69, 184410 (2004) · v.2: typo correction (one of the field directions was misprinted in the v.1)
arxiv created 2003/12/25 · openalex publication_date 2004/05/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Three kinds of magnetic-resonance signals were detected in crystals of the spin-gap magnet TlCuCl3. First, we have found antiferromagnetic resonance absorption in the field-induced antiferromagnetic phase above the critical field Hc. This resonance frequency is strongly anisotropic with respect to the direction of the magnetic field. The field dependence of the induced order parameter is determined. Second, we have observed the microwave absorption due to the transitions between the singlet ground state and the excited collective triplet states. Finally, the thermally activated resonance absorption due to the transitions between the spin sublevels of the triplet excitations was found. These sublevels are split by the crystal field and external magnetic field.