TY - JOUR
T1 - Exchange-striction associated with the elliptical proper helical magnetic structure in the ferroelectric phase of CuFe1-yGayO 2
AU - Terada, N.
AU - Nakajima, T.
AU - Mitsuda, S.
AU - Matsuda, M.
AU - Kakurai, K.
AU - Tanaka, Y.
AU - Kitazawa, H.
PY - 2010
Y1 - 2010
N2 - Recently, the detail magnetic structure in the ferroelectric phase of CuFe1-yGayO2 has been determined to be the proper helical structure with the ellipticity of ∼ 0.9 by the comprehensive neutron diffraction study.[Nakajima et al. Phys. Rev. B 79 214423 (2009)] In the present study, we have investigated the lattice modulation associated with the elliptical magnetic structure, using the resonant X-ray diffraction measurements on CuFe0.965Ga0.035O2. We observed the superlattice reflection indexed as (0 1 + 2qm 0), where qm is the wave number of the magnetic modulation. The energy spectrum near the Fe-K absorption edge for the (0 1 + 2qm 0) intensity conforms with that for the fundamental (0 2 0) intensity within experimental accuracy, suggesting that the superlattice modulation is at least associated with displacements of the Fe ions. We discuss the origin of the superlattice modulation with the exchange striction model.
AB - Recently, the detail magnetic structure in the ferroelectric phase of CuFe1-yGayO2 has been determined to be the proper helical structure with the ellipticity of ∼ 0.9 by the comprehensive neutron diffraction study.[Nakajima et al. Phys. Rev. B 79 214423 (2009)] In the present study, we have investigated the lattice modulation associated with the elliptical magnetic structure, using the resonant X-ray diffraction measurements on CuFe0.965Ga0.035O2. We observed the superlattice reflection indexed as (0 1 + 2qm 0), where qm is the wave number of the magnetic modulation. The energy spectrum near the Fe-K absorption edge for the (0 1 + 2qm 0) intensity conforms with that for the fundamental (0 2 0) intensity within experimental accuracy, suggesting that the superlattice modulation is at least associated with displacements of the Fe ions. We discuss the origin of the superlattice modulation with the exchange striction model.
UR - http://www.scopus.com/inward/record.url?scp=77950462622&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/211/1/012005
DO - 10.1088/1742-6596/211/1/012005
M3 - Article
AN - SCOPUS:77950462622
SN - 1742-6588
VL - 211
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
M1 - 012005
ER -