Incommensurate Charge Order Phase in Fe{sub 2}OBO{sub 3} due to Geometrical Frustration

Journal Article · Fri Dec 21 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.256402· OSTI ID:21024621

Angst, M; Kim, D -H; Sales, B C; Mandrus, D ^[1]; Hermann, R P ^[2]; Schweika, W ^[2]; Kim, J -W ^[3]; Khalifah, P ^[4]; Xiang, H J; Whangbo, M -H ^[5]

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1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
2. Institut fuer Festkoerperforschung, Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany)
3. Ames Laboratory, Ames, Iowa 50010 (United States)
4. Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003 (United States)
5. Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695 (United States)

The temperature dependence of charge order in Fe{sub 2}OBO{sub 3} was investigated by resistivity and differential scanning calorimetry measurements, Moessbauer spectroscopy, and synchrotron x-ray scattering, revealing an intermediate phase between room temperature and 340 K, characterized by coexisting mobile and immobile carriers, and by incommensurate superstructure modulations with temperature-dependent propagation vector ((1/2),0,{tau}). The incommensurate modulations arise from specific antiphase boundaries with low energy cost due to geometrical charge frustration.

• OSTI ID: 21024621
• Journal Information: Physical Review Letters, Vol. 99, Issue 25; Other Information: DOI: 10.1103/PhysRevLett.99.256402; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORATES
CALORIMETRY
ENERGY ACCOUNTING
IRON COMPOUNDS
MODULATION
MOESSBAUER EFFECT
SYNCHROTRONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0273-0400 K
X-RAY DIFFRACTION