Exchange-striction associated with the elliptical proper helical magnetic structure in the ferroelectric phase of CuFe $_{1-y}$ Ga $_{y}$ O $_{2}$

Terada, Noriki*; Nakajima, Taro*; Mitsuda, Setsuo*; Matsuda, Masaaki; Kakurai, Kazuhisa; Tanaka, Yoshihito*; Kitazawa, Hideaki*

Detailed magnetic structure in the ferroelectric phase of CuFe $_{1-y}$ Ga $_{y}$ O $_{2}$ has been recently determined to be proper helical structure with the ellipcity of 0.9 by the comprehensive neutron diffraction study. In the present study, we have investigated the lattice modulation associated with the elliptical magnetic structure, using resonant X-ray diffraction measurements on CuFe $_{0.965}$ Ga $_{0.035}$ O $_{2}$ . We observed the superlattice reflection indexed as (0, 1+2 $_{rm m}$ , 0), where $_{rm m}$ is the wave number of the magnetic modulation. The energy spectrum near the Fe- absorption edge for the superlattice peak intensity conforms with that for the fundamental (0, 2, 0) intensity, suggesting that the superlattice modulation is at least associated with the displacements of the Fe ions, The origin of the superlattice modulation is discussed within the exchange-striction model.

Language	:	English
Journal	:	Journal of Physics; Conference Series
Volume	:	211
Number	:	1
Pages	:	p.012005_1 - 012005_6
Publication Year/Month	:	2010/01
Meeting title	:	Polarized Neutrons and Synchrotron X-rays for Magnetism 2009 (PNSXM 2009)
Held date	:	2009/08
Location (city)	:	Bonn
Location (country)	:	Germany
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1088/1742-6596/211/1/012005
DOI for research data	:
Keywords	:	no keyword
Research Facility	:	JRR-3M(研究炉3)
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:	理化学研究所; 東京理科大学; 物質・材料研究機構

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Registration No. : BB20103950
JAEA Abstracts No. :
Paper Submission No. : 12123

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Exchange-striction associated with the elliptical proper helical magnetic structure in the ferroelectric phase of CuFeGaO

Exchange-striction associated with the elliptical proper helical magnetic structure in the ferroelectric phase of CuFe $_{1-y}$ Ga $_{y}$ O $_{2}$