Radhakrishnan, SrinivasanSrinivasanRadhakrishnanRangarajan, JagannathanJagannathanRangarajanBaerner, KlausKlausBaerner2018-11-072018-11-072014https://resolver.sub.uni-goettingen.de/purl?gro-2/33171EuMnO3 nanocrystals (Phi(av) similar to 5 nm) synthesized using sol-gel thermolysis exhibit significant difference in magnetic structure in comparison to their bulk-counterpart (Phi(av) similar to 3 mu m). Opto- and magneto-impedance techniques are successful local probes to bring out the difference between the bulk, nano-manganites with the latter manifesting in multiplicity of spin-defect ensembles attributed to pronounced difference between surface and core states. Electron paramagnetic resonance spectra also confirm the variety of spin-defect ensembles arising from pronounced surface states. Upon optical perturbation, there is significant drop in resistivity (approximately four orders) at room temperature observed for the bulk EuMnO3, an otherwise insulating system, which suggests an interesting scope for possible application. (C) 2014 Society of Photo-Optical Instrumentation Engineers (SPIE).journal_article10.1117/1.JNP.8.083086000338417000001