Magnetic interactions in BiFe0.5Mn0.5O3 films and BiFeO3/BiMnO3 superlattices

被引：0
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作者：
Qingyu Xu
Yan Sheng
M. Khalid
Yanqiang Cao
Yutian Wang
Xiangbiao Qiu
Wen Zhang
Maocheng He
Shuangbao Wang
Shengqiang Zhou
Qi Li
Di Wu
Ya Zhai
Wenqing Liu
Peng Wang
Y. B. Xu
Jun Du
机构：
[1] Southeast University,Department of Physics
[2] Key Laboratory of MEMS of the Ministry of Education,Department of Materials Science and Engineering
[3] Southeast University,Department of Physics and Collaborative Innovation Center of Advanced Microstructures
[4] Collaborative Innovation Center of Suzhou Nano Science and Technology,undefined
[5] Soochow University,undefined
[6] National Laboratory of Solid State Microstructures,undefined
[7] Nanjing University,undefined
[8] Helmholtz-Zentrum Dresden-Rossendorf,undefined
[9] Institute of Ion Beam Physics and Materials Research,undefined
[10] Nanjing University,undefined
[11] Nanjing University,undefined
[12] College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures,undefined
[13] Nanjing University,undefined
[14] York-Nanjing Joint Centre,undefined
[15] School of Electronic Science and Engineering,undefined
[16] Nanjing University,undefined
来源：
Scientific Reports | / 5卷
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摘要：
The clear understanding of exchange interactions between magnetic ions in substituted BiFeO3 is the prerequisite for the comprehensive studies on magnetic properties. BiFe0.5Mn0.5O3 films and BiFeO3/BiMnO3 superlattices have been fabricated by pulsed laser deposition on (001) SrTiO3 substrates. Using piezoresponse force microscopy (PFM), the ferroelectricity at room temperature has been inferred from the observation of PFM hysteresis loops and electrical writing of ferroelectric domains for both samples. Spin glass behavior has been observed in both samples by temperature dependent magnetization curves and decay of thermo-remnant magnetization with time. The magnetic ordering has been studied by X-ray magnetic circular dichroism measurements and Fe-O-Mn interaction has been confirmed to be antiferromagnetic (AF). The observed spin glass in BiFe0.5Mn0.5O3 films has been attributed to cluster spin glass due to Mn-rich ferromagnetic (FM) clusters in AF matrix, while spin glass in BiFeO3/BiMnO3 superlattices is due to competition between AF Fe-O-Fe, AF Fe-O-Mn and FM Mn-O-Mn interactions in the well ordered square lattice with two Fe ions in BiFeO3 layer and two Mn ions in BiMnO3 layer at interfaces.
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