title: Preparation, characterization and ESR studies of bulk and nano sized pyrochlore La2-xGdxZr2O7 (x=0.025, 0.05, 0.075 and 0.1).
abstract: Bulk and nano sized pyrochlore of composition La(2-x)Gd(x)Zr(2)O(7) (x=0.025, 0.05, 0.075 and 0.1) have been prepared by sol-gel method. They are characterized by powder X-ray diffraction and infrared spectroscopy. The sintering temperature influences the particle size of the sample. The room temperature powder ESR of La(1.95)Gd(0.05)Zr(2)O(7) gave characteristic "U" spectrum. The influence of particle size on the ESR of Gd(3+) is investigated. Possible reason for the disappearance of "U" spectrum with increase in the particle size is given.
authors.affiliation: Department of Chemistry, Osmania University, Hyderabad 500 007, India.
authors.forename: K
authors.initials: K
authors.lastname: Koteswara Rao
authors.forename: N
authors.initials: N
authors.lastname: Anantharamulu
authors.forename: M
authors.initials: M
authors.lastname: Salagram
authors.forename: M
authors.initials: M
authors.lastname: Vithal
mesh_terms: D004578:Electron Spin Resonance Spectroscopy; D053758:Nanoparticles / Q000737:chemistry*; D009556:Niobium / Q000737:chemistry*; D010316:Particle Size; D013055:Spectrophotometry, Infrared; D014961:X-Ray Diffraction
chemical_list: D009556:Niobium; C016709:pyrochlore