Charge Order, Dynamics, and Magnetostructural Transition in Multiferroic LuFe2O4

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.101.227602· OSTI ID:943547

Xu, S. U. ^[1]; Angst, Manuel ^[2]; Brinzari, T. V. ^[1]; Hermann, Raphael P. ^[3]; Musfeldt, J. L. ^[1]; Christianson, Andrew D ^[2]; Mandrus, David ^[2]; Mcgill, S. ^[4]; Kim, J. -W. ^[5]; Islam, Z. ^[6]

---

1. University of Tennessee, Knoxville (UTK)
2. ORNL
3. Forschungszentrum Julich, Julich, Germany
4. Florida State University
5. Ames Laboratory
6. Argonne National Laboratory (ANL)

The cascade of temperature and field-driven transitions in LuFe<2/>O<4/> was investigated byM Nossbauer and optical spectroscopies, magnetization, and x-ray scattering. A correlation of Fe2+ Fe3+ charge transfer excitations with the 320 K phase transition below which uperstructure reflections appear confirms its association with gradual charge carrier freezing. Fe2+ on-site excitations are sensitive to the 175 K magnetic transition, which Bragg splitting and large magneto optical contrast suggest involes a monoclinic distortion that can be driven by both temperature and magnetic field. PACS numbers: 71.30.+h,75.30.Kz,78.20.Ci,76.70.+y

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 943547
• Journal Information: Physical Review Letters, Vol. 101, Issue 22; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LUTETIUM OXIDES
IRON OXIDES
PHASE TRANSFORMATIONS
CHARGE CARRIERS
MAGNETIZATION
PRECURSOR
TEMPERATURE DEPENDENCE
MAGNETIC FIELDS