Observation of antiferromagnetic resonance in GdBa2Cu3O<i>x</i>
A. G. AndersPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. G. BorisenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovS. V. VolotskiĭPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovA. I. ZvyaginPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovM. I. KobetsPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovМ. Б. КосмынаPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovВ. А. ПащенкоPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. M. PuzikovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. P. SeminozhenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovA. A. StepanovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
ABI
Abstract
The peculiarities of magnetic-resonance absorption in polycrystalline GdBa2Cu3O at a frequency ν0 = 37.35 GHz are investigated in the vicinity of the Néel temperature TN = 2.24 K. The temperature dependence of the position of resonance curve obtained for the antiferromagnetic phase makes it possible to determine the gap in the energy spectrum ϵ0 = 39 ± 2 GHz at zero temperature. It is shown that the broadening of the EPR line in the paramagnetic phase is described by the dependence Δ H ∝ (T−TN)−m for m ≃ 0.25.
Topics
Identifiers
Citations and references
Cited by 010 references