Far-Infrared Spectroscopic Study of Electron Spin Resonance in LaMnO3

1
Far-Infrared Spectroscopic Study of Electron Spin
Resonance in LaMnO3
Diyar Talbayev
May 2004

• High field ESR spectrometer with continuous
  frequency coverage in the far-infrared frequency
  domain was built
• Antiferromagnetic resonance (AFMR) measurements
  on LaMnO3 single crystal were performed
• The AFMR frequencies calculated from the uniaxial
  antiferromagnet model (black squares on the
  figures) do not agree with the experiment when
  the static field is perpendicular to the easy
  axis (b direction in the figures)
• A canted antiferromagnet model fully explains the
  measurements (white diamonds)

H parallel to b