Doping effect on the charge ordering in LuFe $_{2}$ O $_{4}$

Matsuo, Yoji*; Horibe, Yoichi*; Mori, Shigeo*; Yoshii, Kenji ; Ikeda, Naoshi*

The magnetic and dielectric properties are investigated forTmFe $_{2}$ O $_{4}$ and TmFeCuO $_{4}$ . The properties of TmFe $_{2}$ O $_{4}$ , which shows the ferroelectricity from iron-valence ordering, are essentially the same as those of the other RFe $_{2}$ O $_{4}$ oxides, i.e., ferrimagnetic ordering at around 250 K and dielectric constants larger than 3000 at around room temperature. On the other hand, the Cu-substituted oxide TmFeCuO $_{4}$ shows no magnetic transition and considerably smaller dielectric constants. The change of the properties is likely attributable to a reduction of a charge transfer between the transition-metal ions.

Language	:	English
Journal	:	Journal of Magnetism and Magnetic Materials
Volume	:	310
Number	:	2, Part2
Pages	:	p.e349 - e351
Publication Year/Month	:	2007/03
Meeting title	:	17th International Conference on Magnetism (ICM 2006)
Held date	:	2006/08
Location (city)	:	Kyoto
Location (country)	:	Japan
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Keywords	:	no keyword
Research Facility	:	SPring-8(大型放射光施設)
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Registration No. : BB20063660
JAEA Abstracts No. : 35001021
Paper Submission No. : 2580

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Doping effect on the charge ordering in LuFeO

Doping effect on the charge ordering in LuFe $_{2}$ O $_{4}$