Abstract
Abstract The ESR spectra of spin-Peierls crystal CuGeO3 and Haldane magnet PbNi2V2O8 doped with Mg revealed the coexistence of paramagnetic and antiferromagnetic spin resonance modes below the points of the impurity induced ordering. The ordering is known to be due to the restoring of the AFM staggered magnetization near impurities. The surprising paramagnetic component observed at low doping indicates a nonuniform structure of the ordered phase with a portion of clusters of staggered magnetization which are isolated from the merged clusters by slightly disturbed spin-gap matrix. Isolated clusters provide paramagnetic signals due to their net spin.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
