Non-Resonant and Resonant X-Ray Scattering Studies on Multiferroic TbMn{sub 2}O{sub 5}

Journal Article · Fri Nov 09 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.197601· OSTI ID:21024427

Koo, J; Song, C; Ji, S; Lee, J -S; Park, J; Jang, T -H; Yang, C -H; Jeong, Y H ^[1]; Park, J -H; Lee, K -B ^[2]; Koo, T Y; Park, Y J; Kim, J -Y ^[3]; Wermeille, D; Goldman, A I ^[4]; Srajer, G ^[5]; Park, S ^[6]; Cheong, S -W ^[6]

---

1. eSSC and Department of Physics, POSTECH, Pohang 790-784, Korea (Korea, Republic of)
2. eSSC and Department of Physics, POSTECH, Pohang 790-784 (Korea, Republic of)
3. Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Korea (Korea, Republic of)
4. Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
5. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
6. Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)

Comprehensive x-ray scattering studies, including resonant scattering at Mn L, Tb L, and M edges, were performed on single crystals of TbMn{sub 2}O{sub 5} for crystallographic data to elucidate the nature of its commensurate and incommensurate phases. The scattering results provide direct evidence of symmetry lowering to the ferroelectric phase driven by magnetically induced lattice modulations and show the presence of multiple magnetic orders. The competing orders under spin-frustrated geometry are believed to cause discommensuration and result in the commensurate-to-incommensurate phase transition around 24 K. It is proposed that the low temperature incommensurate phase consists of commensurate domains separated by antiphase domain walls which change both signs of spontaneous polarizations and x-ray scattering amplitudes for forbidden reflections.

• OSTI ID: 21024427
• Journal Information: Physical Review Letters, Vol. 99, Issue 19; Other Information: DOI: 10.1103/PhysRevLett.99.197601; (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
CRYSTALLOGRAPHY
FERROELECTRIC MATERIALS
MANGANATES
MONOCRYSTALS
PHASE TRANSFORMATIONS
POLARIZATION
RESONANCE SCATTERING
SPIN
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0013-0065 K
TERBIUM COMPOUNDS
X-RAY DIFFRACTION