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

被引：37
|
作者：
Xu, Qingyu [1 ,2 ,3 ,4 ]
Sheng, Yan [1 ]
Khalid, M. [5 ]
Cao, Yanqiang [6 ]
Wang, Yutian [5 ]
Qiu, Xiangbiao [6 ]
Zhang, Wen [1 ]
He, Maocheng [7 ,8 ]
Wang, Shuangbao [8 ,9 ]
Zhou, Shengqiang [5 ]
Li, Qi [1 ]
Wu, Di [6 ]
Zhai, Ya [1 ]
Liu, Wenqing [10 ]
Wang, Peng [8 ,9 ]
Xu, Y. B. [10 ]
Du, Jun [2 ,7 ,8 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China
[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[3] Southeast Univ, Key Lab MEMS, Minist Educ, Nanjing 210096, Jiangsu, Peoples R China
[4] Soochow Univ, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215123, Peoples R China
[5] Helmholtz Zentrum Dresden Rossendorf, Inst Ion BeamPhys & Mat Res, D-01328 Dresden, Germany
[6] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210008, Jiangsu, Peoples R China
[7] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
[8] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China
[9] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China
[10] Nanjing Univ, Sch Elect Sci & Engn, York Nanjing Joint Ctr, Nanjing 210093, Jiangsu, Peoples R China
来源：
SCIENTIFIC REPORTS | 2015年 / 5卷
基金：
中国国家自然科学基金;
关键词：
SPIN-GLASS BEHAVIOR;
D O I：
10.1038/srep09093
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
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 andFMMn-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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页数：8
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