2005/09/01 by V. N. Glazkov, A. I. Smirnov, A. Revcolevschi +1
Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Antiferromagnetism #Condensed matter physics #Magnetic anisotropy #Magnetic field #Magnetic properties of thin films #Magnetization #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Resonance (particle physics) #Spin (aerodynamics) #Spins #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.72.104401
published as Physical review B 72, 104401 (2005) · RevTeX, 9 pages, 7 figures
arxiv created 2005/09/01 · openalex publication_date 2005/09/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A quasi-one-dimensional antiferromagnet with a strong reduction of the ordered spin component, BaCu2Si2O7, is studied by the magnetic resonance technique in a wide field and frequency range. In addition to a conventional spin-flop transition at the magnetic field parallel to the easy axis of spin ordering, magnetic resonance spectra indicate additional spin-reorientation transitions in all three principal orientations of magnetic fields. At these additional transitions the spins rotate in a plane perpendicular to the magnetic field, keeping the mutual arrangement of ordered spin components. The observed magnetic resonance spectra and spin-reorientation phase transitions are quantitatively described by a model that includes the anisotropy of transverse susceptibility with respect to the order parameter orientation. The anisotropy of the transverse susceptibility and the strong reduction of the anisotropy energy due to the quantum spin fluctuations are proposed to be the reason for the observed spin reorientations.