Magnon spectrum and electron spin resonance in antiferromagnet with large single-ion easy plane anisotropy

Microwave dynamics of the stoichiometric and bond-disordered anisotropic S=1 chain antiferromagnet NiCl2−4SC(NH2Soldatov1, Смирнов2, Povarov3 et al. 2020Phys. Rev. B5190View full textAdd to dashboardCite

“…Recently another approach for the calculation of the AFMR spectrum in the field-induced antiferromagneti- cally ordered phase was suggested, which implies a 1/S expansion for the order parameter and resonance frequencies [22]. Here a significant influence of the interchain exchange is predicted while the effects of parameters J and D on the gap ∆ 2 and H res are of the same sign as in the theory of Ref.…”