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Issue 27, 2011
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Structural phase transitions and magnetic order in SrTcO3

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The structure of the perovskite SrTcO3 has been investigated using both synchrotron X-ray and neutron powder diffraction. At room temperature SrTcO3 is orthorhombic as a consequence of cooperative tilting of the corner sharing TcO6 octahedra. The tilts are sequentially removed as the sample is heated with the oxide displaying the sequence of structres PnmaImmaI4/mcmPm[3 with combining macron]m. Neutron powder diffraction data collected in the temperature range 4–1023 K indicate that SrTcO3 has G-type antiferromagnetic structure, in which each Tc moment is antiparallel to its six nearest neighbours, below ∼1000 K. The magnetic structure is collinear antiferromagnetic with the technetium moments parallel to c-axis and can be described by the propagation vector k = [0,0,0] and the basis vector (0,0,Az). The same magnetic structure is observed in each of the four crystal structures.

Graphical abstract: Structural phase transitions and magnetic order in SrTcO3

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Publication details

The article was received on 16 Mar 2011, accepted on 13 May 2011 and first published on 08 Jun 2011

Article type: Paper
DOI: 10.1039/C1DT10445D
Dalton Trans., 2011,40, 7228-7233

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    Structural phase transitions and magnetic order in SrTcO3

    G. J. Thorogood, M. Avdeev, M. L. Carter, B. J. Kennedy, J. Ting and K. S. Wallwork, Dalton Trans., 2011, 40, 7228
    DOI: 10.1039/C1DT10445D

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