Elemental substitution effects in multiferroic R Fe2O4 (R: Rare earths)
Elemental substitution effects in multiferroic R Fe2O4 (R: Rare earths)
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DOI：
10.1002/pssc.201400250
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
K. Yoshii;T. Funae;M. Mizumaki;Hiroki Ejiri;N. Ikeda;H. Saitoh;D. Matsumura
中科院分区：
文献类型：
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作者：
K. Yoshii;T. Funae;M. Mizumaki;Hiroki Ejiri;N. Ikeda;H. Saitoh;D. Matsumura
本文报道了多铁性R型Fe_2 O_4（R：Y，Ho-Lu，In）中元素替代的影响。到目前为止还没有报道的在Fe位置处被Ga 3+取代，显示亚铁磁转变温度（TN）急剧下降。这可能是由于铁离子之间的磁相互作用的抑制，根据我们以前的结果，其他取代系统，如R FeCoO 4。室温附近的介电常数与R Fe 2 O 4的介电常数相当。该系统的介质损耗抑制效果较好，具有一定的实用价值.还尝试了用大的R ~（3+）离子如Dy ~（3+）取代R位。溶解极限可达R ~+的~ 10%。Dy ~（3+）置换使TN提高5-10 K。（© 2015 WILEY-VCH Verlag GmbH & Co. KGaA，魏因海姆）
We report the effects of elemental substitutions in multiferroic R Fe2O4 (R: Y, Ho-Lu, In). The substitution by nonmagnetic Ga3+ at the Fe site, which has not been reported so far, shows a drastic decrease in the ferrimagnetic transition temperature (TN). This is plausibly owing to the suppression of magnetic interactions between Fe ions, based on our previous results of other substituted systems such as R FeCoO4. Dielectric constants near room temperature were comparable to those of R Fe2O4. The suppression of dielectric loss in this system is suitable to application. The R -site substitution was also attempted by the large R3+ ions such as Dy3+. The solubility limit was up to ∼10% of R ions. TN was raised by 5-10 K for Dy3+ substitution. (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)