Electron spin resonance (ESR) in multiferroic TbMnO3

We report temperature dependent X-Band (v similar to 9.4 GHz) electron spin resonance (ESR) measurement in a single crystal of TbMnO3. A single Lorentzian ESR line with an isotropic g similar to 1.96 was observed for T >= 120K up to 600K. The ESR signal is attributed to the Mn3+ ions in a insulator environment. For the three crystallographic axes the temperature dependence ESR linewidth shows a strong broadening as the temperature decreases due to the presence of short range magnetic correlations. (c) 2006 Elsevier B.V. All rights reserved.