Crystal structure and phase transition in the doped super‐ionic conductor bismuth vanadate Bi4(V, Fe)2O11 revealed by neutron diffraction. Issue 7 (8th January 2013)

• Record Type: Journal Article
• Authors: Golosovsky, I. V.; Golubko, N. V.; Mosunov, A. V.; Politova, E. D.; Murasheva, V. V.; Fortalnova, E. A.; Rusakov, V. S.; André, G.; Porcher, F.
• Is Part Of: Physica status solidi. Volume 250:Issue 7(2013:Jul.)
• Page Start: 1345
• Page End: 1351
• Publication Date: 2013-01-08
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201248257
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Bismuth vanadate Bi₄V₂O_{11−<italic>y</italic>} doped with Fe was studied by neutron diffraction. It was shown that Fe substitutes V only partially and the redundant iron forms an impurity hematite phase. In the sample with nominal content Bi₄(V_0.96Fe_0.04)₂O_{11−<italic>y</italic>} a new phase transition within the frame of the monoclinic structure with the appearing of inversion center was discovered in the temperature region 200–300 °C. This transition was also confirmed by DTA experiments. Slow stabilization of the crystal structure with stabilization times of the order of hours, accompanied by a decrease of the unit cell volume, was observed. At high level of Fe doping, in addition to the dominant tetragonal γ‐phase some amount of the nanosized monoclinic α‐phase was detected.</p> </abstract>