Magnetic properties of single crystalline Lu $_{2}$ Fe $_{3}$ O $_{7}$

Yoshii, Kenji ; Ikeda, Naoshi*; Fukuyama, Ryota*; Nagata, Tomoko*; Kambe, Takashi*; Yoneda, Yasuhiro ; Fukuda, Tatsuo ; Mori, Shigeo*

The rare-earth iron oxides R $_{2}$ Fe $_{3}$ O $_{7}$ (R=Yb and Lu) are materials closely related to a multiferroic system RFe $_{2}$ O $_{4}$ , which shows a new type of ferroelectiricy (i.e., electronic ferroelectiricy) at 330 K owing to real-space charge ordering of Fe ions. In this work, we have investigated detailed magnetic properties of a single crystalline LuFe $_{3}$ O $_{7}$ . It was found that this oxide shows the magnetic transition temperature of 270 K, which is higher than that of the corresponding RFe $_{2}$ O $_{4}$ (LuFe $_{2}$ O $_{4}$ ), 240-250 K. AC magnetic susceptibility measurements exhibited spin-glass behavior at around the magnetic transition temperature. In addition, exchange bias and magnetocaloric effect were observed at low temperatures, similarly to RFe $_{2}$ O $_{4}$ . These phenomena are explained in connection with several factors, such as a coexistence of ferromagnetic and antiferromagnetic interactions between Fe ions.

Language	:	English
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Meeting title	:	International Conference on Strongly Correlated Electron Systems (SCES 2013)
Held date	:	2013/08
Location (city)	:	Tokyo
Location (country)	:	Japan
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Registration No. : BB20131011
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Magnetic properties of single crystalline LuFeO

Magnetic properties of single crystalline Lu $_{2}$ Fe $_{3}$ O $_{7}$