Surface phase transitions in BiFeO3 below room temperature

R. Jarrier*, X. Marti, J. Herrero-Albillos, P. Ferrer, R. Haumont, P. Gemeiner, G. Geneste, P. Berthet, T. Schuelli, P. Cevc, R. Blinc, Stanislaus S. Wong, Tae-Jin Park, M. Alexe, M. A. Carpenter, J. F. Scott, G. Catalan, B. Dkhil

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

71 Citations (Scopus)

Abstract

We combine a wide variety of experimental techniques to analyze two heretofore mysterious phase transitions in multiferroic bismuth ferrite at low temperature. Raman spectroscopy, resonant ultrasound spectroscopy, electron paraelectric resonance, x-ray lattice constant measurements, conductivity and dielectric response, and specific heat and pyroelectric data have been collected for two different types of samples: single crystals and, in order to maximize surface/volume ratio to enhance surface phase transition effects, BiFeO3 nanotubes were also studied. The transition at T = 140.3Kis shownto be a surface phase transition, with an associated sharp change in lattice parameter and charge density at the surface. Meanwhile, the 201 K anomaly appears to signal the onset of glassy behavior.

Original languageEnglish
Article number184104
Number of pages10
JournalPhysical Review. B, Condensed matter and materials physics
Volume85
Issue number18
DOIs
Publication statusPublished - 16 May 2012

Keywords

  • MULTIFERROIC BIFEO3
  • MAGNETIC-PROPERTIES
  • NEUTRON-DIFFRACTION
  • BISMUTH FERRITE
  • FE-57 NMR
  • GROWTH
  • CRYSTALS
  • RELAXOR
  • OXIDE

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