High frequency ESR measurements of one‐dimensional edge‐sharing CuO 2 chain system Ca 2 Y 2 Cu 5 O 10

Submillimeter and millimeter wave ESR measurements of one-dimensional CuO2 chain system Ca2Y2Cu5O10 have been performed using the pulsed magnetic field up to 16 T. The g-values are estimated to be g‖ = 2.31 and g⊥ = 2.03 from the powder pattern analysis. Obtained frequency-field diagram at 1.8 K is well described by an antiferromagnetic resonance mode with an uniaxial anisotropy. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)