Preparation, characterization and ESR studies of bulk and nano sized pyrochlore La2-xGdxZr2O7 (x=0.025, 0.05, 0.075 and 0.1)

K Koteswara Rao; N Anantharamulu; M Salagram; M Vithal

doi:10.1016/j.saa.2006.04.005

Preparation, characterization and ESR studies of bulk and nano sized pyrochlore La2-xGdxZr2O7 (x=0.025, 0.05, 0.075 and 0.1)

Spectrochim Acta A Mol Biomol Spectrosc. 2007 Mar;66(3):646-9. doi: 10.1016/j.saa.2006.04.005. Epub 2006 Apr 28.

Authors

K Koteswara Rao¹, N Anantharamulu, M Salagram, M Vithal

Affiliation

¹ Department of Chemistry, Osmania University, Hyderabad 500 007, India.

PMID: 16870499
DOI: 10.1016/j.saa.2006.04.005

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Electron Spin Resonance Spectroscopy
Nanoparticles / chemistry*
Niobium / chemistry*
Particle Size*
Spectrophotometry, Infrared
X-Ray Diffraction

Substances

Niobium
pyrochlore