Wrzesińska Angelika, Khort Alexander, Witkowski Marcin, Szczytko Jacek, Ryl Jacek, Gurgul Jacek, Kharitonov Dmitry S, Łątka Kazimierz, Szumiata Tadeusz, Wypych-Puszkarz Aleksandra
Lodz University of Technology, Zeromskiego 116, 90-924, Lodz, Poland.
KTH Royal Institute of Technology, Stockholm, Sweden.
Sci Rep. 2021 Nov 23;11(1):22746. doi: 10.1038/s41598-021-01983-z.
In this work, the multiferroic bismuth ferrite materials BiREFeO doped by rare-earth (RE = La, Eu, and Er) elements were obtained by the solution combustion synthesis. Structure, electrical, and magnetic properties of prepared samples were investigated by X-ray photoelectron spectroscopy, Mössbauer spectroscopy, electrical hysteresis measurement, broadband dielectric spectroscopy, and SQUID magnetometry. All obtained nanomaterials are characterized by spontaneous electrical polarization, which confirmed their ferroelectric properties. Investigation of magnetic properties at 300.0 K and 2.0 K showed that all investigated BiREFeO ferrites possess significantly higher magnetization in comparison to bismuth ferrites obtained by different methods. The highest saturation magnetisation of 5.161 emu/g at 300.0 K was observed for the BLaFO sample, while at 2.0 K it was 12.07 emu/g for the BErFO sample. Several possible reasons for these phenomena were proposed and discussed.
在本工作中，通过溶液燃烧合成法获得了由稀土元素（RE = La、Eu和Er）掺杂的多铁性铋铁氧体材料BiREFeO。通过X射线光电子能谱、穆斯堡尔谱、电滞回线测量、宽带介电谱和超导量子干涉仪磁强计对制备样品的结构、电学和磁学性质进行了研究。所有获得的纳米材料均具有自发电极化特性，这证实了它们的铁电性质。在300.0 K和2.0 K下对磁性质的研究表明，与通过不同方法获得的铋铁氧体相比，所有研究的BiREFeO铁氧体都具有显著更高的磁化强度。在300.0 K时，BLaFO样品的饱和磁化强度最高，为5.161 emu/g，而在2.0 K时，BErFO样品的饱和磁化强度为12.07 emu/g。针对这些现象提出并讨论了几个可能的原因。
