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Title: Three-layer Aurivillius phases containing magnetic transition metal cations : Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, M = Ru{sub 4+}, Ir{sub 4+}, Mn{sub 4+}, x {approx} 0.5.

Abstract

We report the synthesis of Aurivillius-type phases incorporating magnetic M{sup 4+} cations (M=Mn, Ru, Ir), based on the substitution of M{sup 4+} for Ti{sup 4+} in Bi{sub 2}Sr{sub 2}(Nb,Ta){sub 2}TiO{sub 12}. The key to incorporating these magnetic transition metal cations appears to be the partial substitution of Sr{sup 2+} for Bi{sup 3+} in the {alpha}-PbO-type layer of the Aurivillius phase, leading to a concomitant decrease in the M{sup 4+} content; i.e., the composition of the prepared compounds was Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, x {approx} 0.5. These compounds only exist over a narrow range of x, between an apparent minimum (x {approx} 0.4) Sr{sup 2+} content in the {alpha}-PbO-type [Bi{sub 2}O{sub 2}] layer required for Aurivillius phases to form with magnetic M{sup 4+} cations, and an apparent maximum (x {approx} 0.6) Sr{sup 2+} substitution in this [Bi{sub 2}O{sub 2}] layer. Rietveld-refinement of synchrotron X-ray powder diffraction data making use of anomalous dispersion at the Nb and Ru K edges show that the overwhelming majority of the incorporated M cations occupy the central of the three MO{sub 6} octahedral layers in the perovskite-type block. Magnetic susceptibility measurements are presented and discussed in the context of the potential for multiferroic (magnetoelectric)more » properties in these materials.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); AUSTRALIAN INST. OF SCIENCE AND ENGINEERING
OSTI Identifier:
940687
Report Number(s):
ANL/XSD/JA-57593
Journal ID: ISSN 0022-4596; JSSCBI; TRN: US0807182
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Solid State Chem.; Journal Volume: 180; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
43 PARTICLE ACCELERATORS; CATIONS; DIFFRACTION; MAGNETIC SUSCEPTIBILITY; SYNCHROTRONS; SYNTHESIS; TRANSITION ELEMENTS

Citation Formats

Sharma, N., Wrighter, G. E., Chen, P. Y., Kennedy, B. J., Lee, P.L., Ling, C. D., X-Ray Science Division, Univ. of Sydney, and Bragg Inst.. Three-layer Aurivillius phases containing magnetic transition metal cations : Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, M = Ru{sub 4+}, Ir{sub 4+}, Mn{sub 4+}, x {approx} 0.5.. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2006.10.031.
Sharma, N., Wrighter, G. E., Chen, P. Y., Kennedy, B. J., Lee, P.L., Ling, C. D., X-Ray Science Division, Univ. of Sydney, & Bragg Inst.. Three-layer Aurivillius phases containing magnetic transition metal cations : Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, M = Ru{sub 4+}, Ir{sub 4+}, Mn{sub 4+}, x {approx} 0.5.. United States. doi:10.1016/j.jssc.2006.10.031.
Sharma, N., Wrighter, G. E., Chen, P. Y., Kennedy, B. J., Lee, P.L., Ling, C. D., X-Ray Science Division, Univ. of Sydney, and Bragg Inst.. Mon . "Three-layer Aurivillius phases containing magnetic transition metal cations : Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, M = Ru{sub 4+}, Ir{sub 4+}, Mn{sub 4+}, x {approx} 0.5.". United States. doi:10.1016/j.jssc.2006.10.031.
@article{osti_940687,
title = {Three-layer Aurivillius phases containing magnetic transition metal cations : Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, M = Ru{sub 4+}, Ir{sub 4+}, Mn{sub 4+}, x {approx} 0.5.},
author = {Sharma, N. and Wrighter, G. E. and Chen, P. Y. and Kennedy, B. J. and Lee, P.L. and Ling, C. D. and X-Ray Science Division and Univ. of Sydney and Bragg Inst.},
abstractNote = {We report the synthesis of Aurivillius-type phases incorporating magnetic M{sup 4+} cations (M=Mn, Ru, Ir), based on the substitution of M{sup 4+} for Ti{sup 4+} in Bi{sub 2}Sr{sub 2}(Nb,Ta){sub 2}TiO{sub 12}. The key to incorporating these magnetic transition metal cations appears to be the partial substitution of Sr{sup 2+} for Bi{sup 3+} in the {alpha}-PbO-type layer of the Aurivillius phase, leading to a concomitant decrease in the M{sup 4+} content; i.e., the composition of the prepared compounds was Bi{sub 2-x}Sr{sub 2+x}(Nb,Ta){sub 2+x}M{sub 1-x}O{sub 12}, x {approx} 0.5. These compounds only exist over a narrow range of x, between an apparent minimum (x {approx} 0.4) Sr{sup 2+} content in the {alpha}-PbO-type [Bi{sub 2}O{sub 2}] layer required for Aurivillius phases to form with magnetic M{sup 4+} cations, and an apparent maximum (x {approx} 0.6) Sr{sup 2+} substitution in this [Bi{sub 2}O{sub 2}] layer. Rietveld-refinement of synchrotron X-ray powder diffraction data making use of anomalous dispersion at the Nb and Ru K edges show that the overwhelming majority of the incorporated M cations occupy the central of the three MO{sub 6} octahedral layers in the perovskite-type block. Magnetic susceptibility measurements are presented and discussed in the context of the potential for multiferroic (magnetoelectric) properties in these materials.},
doi = {10.1016/j.jssc.2006.10.031},
journal = {J. Solid State Chem.},
number = 2007,
volume = 180,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}