The effect of interlayer cations on the magnetic properties of the mixed-metal pnictide oxides: A2MnZn2As2O2 (A = Sr, Ba)

T. C. Ozawa, S. M. Kauzlarich, M. Bieringer, C. R. Wiebe, J. E. Greedan, J. S. Gardner

Research output: Contribution to journalArticle

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Abstract

The new pnictide oxide Sr2MnZn2As2O2 is reported. The crystal structure of this compound consists of a 1:1 intergrowth of square-planar MnO2 2- layers and ThCr2Si2-type Zn2As2 2- layers interspersed by Sr cations. This compound has been prepared by sintering the stoichiometric ratio of SrO, Mn, Zn, and As in a fused-silica ampule under 0.2 atm of Ar at 1000 °C for 1 week. The sample quality has been examined by Rietveld refinement of the powder X-ray diffraction data, and the transition metal site (2a and 4d) selectivity has been analyzed by Rietveld refinement of powder neutron diffraction data. Furthermore, effects of this structural order on the magnetic susceptibility and interaction between the magnetic layers have been analyzed by temperature-dependent magnetization measurements. The magnetic structures of both phases, A2MnZn2As2O2 (A = Sr, Ba), have been investigated by temperature-dependent powder neutron diffraction. The Ba analogue exhibits two-dimensional short-range order below about 40 K, whereas for the Sr analogue, no evidence for either long- or short-range order was found over the 2θ range investigated down to 4 K. The results of these characterizations are compared with those of the previously studied phase, Sr2Mn3As2O2.

Original languageEnglish (US)
Pages (from-to)973-980
Number of pages8
JournalChemistry of Materials
Volume13
Issue number3
DOIs
StatePublished - 2001

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Rietveld refinement
Neutron powder diffraction
Oxides
Cations
Magnetic properties
Positive ions
Metals
Magnetic structure
Fused silica
Magnetic susceptibility
X ray powder diffraction
Transition metals
Magnetization
Sintering
Crystal structure
Temperature

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

Ozawa, T. C., Kauzlarich, S. M., Bieringer, M., Wiebe, C. R., Greedan, J. E., & Gardner, J. S. (2001). The effect of interlayer cations on the magnetic properties of the mixed-metal pnictide oxides: A2MnZn2As2O2 (A = Sr, Ba). Chemistry of Materials, 13(3), 973-980. https://doi.org/10.1021/cm000743j

The effect of interlayer cations on the magnetic properties of the mixed-metal pnictide oxides : A2MnZn2As2O2 (A = Sr, Ba). / Ozawa, T. C.; Kauzlarich, S. M.; Bieringer, M.; Wiebe, C. R.; Greedan, J. E.; Gardner, J. S.

In: Chemistry of Materials, Vol. 13, No. 3, 2001, p. 973-980.

Research output: Contribution to journalArticle

Ozawa, TC, Kauzlarich, SM, Bieringer, M, Wiebe, CR, Greedan, JE & Gardner, JS 2001, 'The effect of interlayer cations on the magnetic properties of the mixed-metal pnictide oxides: A2MnZn2As2O2 (A = Sr, Ba)', Chemistry of Materials, vol. 13, no. 3, pp. 973-980. https://doi.org/10.1021/cm000743j
Ozawa, T. C. ; Kauzlarich, S. M. ; Bieringer, M. ; Wiebe, C. R. ; Greedan, J. E. ; Gardner, J. S. / The effect of interlayer cations on the magnetic properties of the mixed-metal pnictide oxides : A2MnZn2As2O2 (A = Sr, Ba). In: Chemistry of Materials. 2001 ; Vol. 13, No. 3. pp. 973-980.
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AB - The new pnictide oxide Sr2MnZn2As2O2 is reported. The crystal structure of this compound consists of a 1:1 intergrowth of square-planar MnO2 2- layers and ThCr2Si2-type Zn2As2 2- layers interspersed by Sr cations. This compound has been prepared by sintering the stoichiometric ratio of SrO, Mn, Zn, and As in a fused-silica ampule under 0.2 atm of Ar at 1000 °C for 1 week. The sample quality has been examined by Rietveld refinement of the powder X-ray diffraction data, and the transition metal site (2a and 4d) selectivity has been analyzed by Rietveld refinement of powder neutron diffraction data. Furthermore, effects of this structural order on the magnetic susceptibility and interaction between the magnetic layers have been analyzed by temperature-dependent magnetization measurements. The magnetic structures of both phases, A2MnZn2As2O2 (A = Sr, Ba), have been investigated by temperature-dependent powder neutron diffraction. The Ba analogue exhibits two-dimensional short-range order below about 40 K, whereas for the Sr analogue, no evidence for either long- or short-range order was found over the 2θ range investigated down to 4 K. The results of these characterizations are compared with those of the previously studied phase, Sr2Mn3As2O2.

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