High frequency ESR measurements on the chromium spinel compound CdCr2O4 have been performed. The observed ESR modes below Hcâ€â‰ 5.7T can be explained well by the calculated resonance modes based on a molecular field theory assuming a helical spin structure. Other than the fundamental ones, we have succeeded in observing the higher-harmonic modes for the first time. A large change of the ESR modes above Hcâ€ indicate that a variation of the spin structure from the helical to the four-sublattice canted one takes place around Hcâ€.
ASJC Scopus subject areas
- Physics and Astronomy(all)