2002/04/04 by D. Ivannikov, M. Biberacher, Markus Biberacher +6 · 1 citation
Materials Science · Mathematics · Physics and Astronomy · #Antiferromagnetism #Atomic physics #Condensed matter physics #Electron paramagnetic resonance #Ferromagnetic resonance #Ferromagnetism #Field (mathematics) #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetization #Materials science #Mathematics #Nuclear magnetic resonance #Physics #Quantum mechanics #Rare-earth and actinide compounds #Resonance (particle physics) #Solid-state spectroscopy and crystallography #Spectral line #Spectroscopy #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.65.214422
published as Phys. Rev. B 65, 214422 (2002) · 13 pages, figures included
arxiv created 2002/04/04 · openalex publication_date 2002/06/04 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
High-field electron-spin-resonance (ESR) experiments have been carried out in single crystals of La_1\ensuremath-xSrxMnO3 in the concentration range 0<~x<~0.175. Different quasioptical arrangements have been utilized for frequencies 40<~\ensuremathν<~700 GHz and for magnetic fields B<~12 T. A splitting of the antiferromagnetic resonance (AFMR) mode is observed in the magnetic field for the parent compound LaMnO3, in agreement with the antiferromagnetic structure of this material. Abrupt changes in the AFMR frequencies have been observed around x\ensuremath≃0.025, and were attributed to a transition between a pure antiferromagnetic and a canted state. For increasing Sr doping the observed AFMR modes are split even in a zero field, which can be naturally explained using a concept of a canted magnetic structure for x<0.1. In La0.825Sr0.175MnO3 the ESR spectra are consistent with the ferromagnetic and metallic state. The lines of ferromagnetic resonance and ferromagnetic antiresonance can be clearly observed. For intermediate concentrations 0.1<~x<~0.15 complicated ESR spectra were observed, which can be well explained by a single ferromagnetic resonance mode and taking electrodynamic effects into account.