Elemental substitution effects in the electronic ferroelectric RFe $_{2}$ O $_{4}$ (R=rare earths)

Yoshii, Kenji ; Yoneda, Yasuhiro ; Ikeda, Naoshi*; Matsuo, Yoji*; Hoshiyama, Takuya*; Horibe, Yoichi*; Mori, Shigeo*

We have investigated the Fe-site substitution effects in the electronic ferroelectric RFe $_{2}$ O $_{4}$ (R=rare earths). It was found that continuous solid solutions were formed for the Mn substitution; RFe $_{2-x}$ Mn $_{x}$ O $_{4}$ was synthesized for 0x1. On the other hand, the substitution of other cations (such as Cu and Ga) was possible in limited x regions; e.g., Ga could be substituted for 0x0.4-0.5 It was also found that the low-temperature magnetization and the dielectric constant were reduced by the substitution. Considering the mechanism of dielectric response in RFe $_{2}$ O $_{4}$ , the change of the physical properties likely arises from a change of electron transfer between the Fe-site ions.

Language	:	English
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Meeting title	:	第19回日本MRS学術シンポジウム
Held date	:	2009/12
Location (city)	:	横浜
Location (country)	:	日本
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Registration No. : BB20092848
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Elemental substitution effects in the electronic ferroelectric RFeO (R=rare earths)

Elemental substitution effects in the electronic ferroelectric RFe $_{2}$ O $_{4}$ (R=rare earths)