Polycrystalline samples were tested under uniaxial mechanical compression at various temperatures in the vicinity of the polar tetragonal to nonpolar tetragonal phase boundary. They are shown to display double loop-like stress-strain behavior, marked by a closed ferroelastic hysteresis loop. Thus, it forms a mechanical analog to the polarization-electric field hysteresis behavior of barium titanate above the Curie temperature. As temperature is increased there is an apparent loss of macroscopically observable ferroelasticity, despite the persistence of tetragonality. Macroscopic experimental results are discussed in conjunction with temperature-dependent and stress-dependent high-energy x-ray diffraction data. This reveals a phase transition below the Curie temperature, marked by a discontinuous change in lattice parameters and octahedral tilting during compressive mechanical loading.
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1 July 2010
Research Article|
July 02 2010
High temperature stress-induced “double loop-like” phase transitions in Bi-based perovskites Available to Purchase
K. G. Webber;
K. G. Webber
a)
1Institute of Materials Science,
Technische Universität Darmstadt
, 64287 Darmstadt, Germany
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Y. Zhang;
Y. Zhang
1Institute of Materials Science,
Technische Universität Darmstadt
, 64287 Darmstadt, Germany
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Wook Jo;
Wook Jo
1Institute of Materials Science,
Technische Universität Darmstadt
, 64287 Darmstadt, Germany
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J. E. Daniels;
J. E. Daniels
2
European Synchrotron Radiation Facility
, F-38043 Grenoble, France
3School of Materials Science and Engineering,
University of New South Wales
, 2052 Sydney, Australia
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J. Rödel
J. Rödel
1Institute of Materials Science,
Technische Universität Darmstadt
, 64287 Darmstadt, Germany
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K. G. Webber
1,a)
Y. Zhang
1
Wook Jo
1
J. E. Daniels
2,3
J. Rödel
1
1Institute of Materials Science,
Technische Universität Darmstadt
, 64287 Darmstadt, Germany
2
European Synchrotron Radiation Facility
, F-38043 Grenoble, France
3School of Materials Science and Engineering,
University of New South Wales
, 2052 Sydney, Australia
a)
Electronic mail: [email protected].
J. Appl. Phys. 108, 014101 (2010)
Article history
Received:
March 11 2010
Accepted:
April 17 2010
Citation
K. G. Webber, Y. Zhang, Wook Jo, J. E. Daniels, J. Rödel; High temperature stress-induced “double loop-like” phase transitions in Bi-based perovskites. J. Appl. Phys. 1 July 2010; 108 (1): 014101. https://doi.org/10.1063/1.3428373
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