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High Pressure Cryst...
High Pressure Crystal and Magnetic Phase Transitions in Multiferroic Bi0.9La0.1FeO3
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- Knee, Christopher, 1973 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Tucker, Matthew G. (författare)
- STFC Rutherford Appleton Laboratory
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- Manuel, P. (författare)
- STFC Rutherford Appleton Laboratory
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- Cai, Shengzhen (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bielecki, Johan, 1982 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Börjesson, Lars, 1957 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Eriksson, Sten, 1958 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2014-01-07
- 2014
- Engelska.
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Ingår i: Chemistry of Materials. - : American Chemical Society (ACS). - 1520-5002 .- 0897-4756. ; 26:2, s. 1180-1186
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The crystal and magnetic structures of multiferroic Bi0.9La0.1FeO3 have been studied using high resolution neutron powder diffraction in the pressure range 0-8 GPa. Two structural phase transitions are observed. The first, at similar to 1 GPa, transforms the polar R3c structure to an antipolar PbZrO3-like root 2a(p) x 2 root 2a(p) x 2a(p) perovskite superstructure; the second, at similar to 5 GPa, results in a smaller, root 2a(p) x root 2a(p) x 2a(p) unit cell and a structure described with Ibmm (nonstandard setting of Imma) symmetry, in which the a(-)a(-)b(0) octahedral tilt system is retained and the antipolar cation displacements lost. Accompanying the changes in the nuclear structure, the antiferromagnetic spin structure evolves from a cycloid, with a modulation length, lambda approximate to 770 angstrom, to collinear arrangements with the moments aligned along the b-axis (Pbam) and the a-axis (Ibmm) of the orthorhombic unit cells. In comparison with BiFeO3 the transition from a rhombohedral to an orthorhombic structure is suppressed by similar to 3 GPa, reflecting the dilution of the stereochemically active bismuth lone pair by lanthanum. A correlation between the cell contraction of Bi1-xLaxFeO3 (0.0
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- bifeo3
- neutron-diffraction
- structural-properties
- bi1-xtbxfeo3
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- art (ämneskategori)
- ref (ämneskategori)
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Knee, Christophe ...
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Tucker, Matthew ...
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Manuel, P.
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Cai, Shengzhen
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Bielecki, Johan, ...
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Börjesson, Lars, ...
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visa fler...
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Eriksson, Sten, ...
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visa färre...
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Chalmers tekniska högskola