skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: X-band EPR studies of ferroelectric lead titanate (PT), piezoelectric lead magnesium niobate (PMN), and PMN/PT powders at 10 and 85 K

Abstract

X-band EPR spectra of lead titanate (PT) and lead magnesium niobate (PMN) powders prepared by different synthetic methods and a PMN/PT powder of the composition 0.9 PMN/01 PT were obtained at 85 and 10 K. Several EPR signals due to adventitious Fe{sup 3+} ion impurities, a signal due to the Ti{sup 3+} ion, and a signal due to the Pb{sup 3+} ion are observed for PT, PMN, and PMN/PT powders. The EPR signals observed at g = 2.0 and 6.0 are assigned to Fe{sup 3+} ions in the B-sites of the perovskite lattice structure of lad titanate with axial symmetry. The EPR signals observed at g = 1.99 and 4.25 are assigned to Fe{sup 3+} ions in the B-sites of the perovskite lattice structure of PMN and 0.9 PMN/0.1 PT materials with cubic and rhombic symmetries, respectively. The sharp EPR signal observed at g = 1.94 is assigned to Ti{sup 3=} ion for PT and 0.9 PMN/0.1 PT powders. In addition, a broader EPR signal at g = 2.28--2.30 for PMN obtained by the molten salt method is assigned to axial Pb{sup 3+} ion sites in this PMN material. EPR results obtained here for the e{sup 3+} ions in themore » B-sites of the PMN materials, in particular, suggest that both cubic and rhombic symmetry sites corresponding to a range of Nb(OMg){sub x}(ONb){sub 6{minus}x} site configurations exist in the PMN. These EPR results indicate that PMN likely exists with partial B-site cation (Mg/Nb) ordering in the perovskite lattice structure.« less

Authors:
;  [1];  [2]
  1. South Dakota State Univ., Brookings, SD (United States). Dept. of Chemistry and Biochemistry
  2. Univ. of New Hampshire, Durham, NH (United States). Dept. of Chemistry
Publication Date:
OSTI Identifier:
328229
Resource Type:
Journal Article
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 10; Journal Issue: 12; Other Information: PBD: Dec 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; LEAD OXIDES; TITANIUM OXIDES; MAGNESIUM OXIDES; NIOBIUM OXIDES; PEROVSKITES; ELECTRON SPIN RESONANCE; ORDER PARAMETERS

Citation Formats

Huang, J, Fitzgerald, J J, and Chasteen, N D. X-band EPR studies of ferroelectric lead titanate (PT), piezoelectric lead magnesium niobate (PMN), and PMN/PT powders at 10 and 85 K. United States: N. p., 1998. Web. doi:10.1021/cm980206n.
Huang, J, Fitzgerald, J J, & Chasteen, N D. X-band EPR studies of ferroelectric lead titanate (PT), piezoelectric lead magnesium niobate (PMN), and PMN/PT powders at 10 and 85 K. United States. https://doi.org/10.1021/cm980206n
Huang, J, Fitzgerald, J J, and Chasteen, N D. 1998. "X-band EPR studies of ferroelectric lead titanate (PT), piezoelectric lead magnesium niobate (PMN), and PMN/PT powders at 10 and 85 K". United States. https://doi.org/10.1021/cm980206n.
@article{osti_328229,
title = {X-band EPR studies of ferroelectric lead titanate (PT), piezoelectric lead magnesium niobate (PMN), and PMN/PT powders at 10 and 85 K},
author = {Huang, J and Fitzgerald, J J and Chasteen, N D},
abstractNote = {X-band EPR spectra of lead titanate (PT) and lead magnesium niobate (PMN) powders prepared by different synthetic methods and a PMN/PT powder of the composition 0.9 PMN/01 PT were obtained at 85 and 10 K. Several EPR signals due to adventitious Fe{sup 3+} ion impurities, a signal due to the Ti{sup 3+} ion, and a signal due to the Pb{sup 3+} ion are observed for PT, PMN, and PMN/PT powders. The EPR signals observed at g = 2.0 and 6.0 are assigned to Fe{sup 3+} ions in the B-sites of the perovskite lattice structure of lad titanate with axial symmetry. The EPR signals observed at g = 1.99 and 4.25 are assigned to Fe{sup 3+} ions in the B-sites of the perovskite lattice structure of PMN and 0.9 PMN/0.1 PT materials with cubic and rhombic symmetries, respectively. The sharp EPR signal observed at g = 1.94 is assigned to Ti{sup 3=} ion for PT and 0.9 PMN/0.1 PT powders. In addition, a broader EPR signal at g = 2.28--2.30 for PMN obtained by the molten salt method is assigned to axial Pb{sup 3+} ion sites in this PMN material. EPR results obtained here for the e{sup 3+} ions in the B-sites of the PMN materials, in particular, suggest that both cubic and rhombic symmetry sites corresponding to a range of Nb(OMg){sub x}(ONb){sub 6{minus}x} site configurations exist in the PMN. These EPR results indicate that PMN likely exists with partial B-site cation (Mg/Nb) ordering in the perovskite lattice structure.},
doi = {10.1021/cm980206n},
url = {https://www.osti.gov/biblio/328229}, journal = {Chemistry of Materials},
number = 12,
volume = 10,
place = {United States},
year = {Tue Dec 01 00:00:00 EST 1998},
month = {Tue Dec 01 00:00:00 EST 1998}
}