High field ESR study of frustrated spinel system LiCrTiO 4

High field ESR measurements of LiCrTiO4 polycrystalline have been performed in the frequency region from 60 GHz to 160 GHz and in the temperature region from 1.8 K to 265 K. An isotropic absorption line is observed. The g-value in the high temperature region is determined to be 1.98 which is a typical value for Cr3+ ion. The g-shift is observed below 20 K, and it continues blow 2.7 K which corresponds to the temperature of the spinglass phase transition. The increase of linewidth is observed below 50 K. These temperature dependences are discussed in connection with other frustrated systems. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)