Magnetic Augment in the Nitrogen Substituted Bismuth Ferrite
Magnetic Augment in the Nitrogen Substituted Bismuth Ferrite
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DOI：
10.1109/tmag.2015.2447546
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发表时间：
2015-05
影响因子：
2.1
通讯作者：
Longsheng Chen;Xiaolong Li;Z. Mao;Jiang Zhang;X. Chen
中科院分区：
文献类型：
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作者：
Longsheng Chen;Xiaolong Li;Z. Mao;Jiang Zhang;X. Chen
采用溶胶-凝胶法成功合成了氮取代铁酸铋多晶样品BiFeO2.1N0.9。研究了其结构和磁性能。从X射线光电子能谱中发现BiFeO2.1N0.9中由于电荷补偿而形成了Fe4+。 BiFeO3的晶体结构几乎不受N掺杂的影响，而磁性能得到了很好的改善。我们认为，正是不同超交换（Fe-N-Fe 和 Fe-O-Fe）的共存打破了自旋螺旋的磁抵消效应，从而增加了宏观磁化强度。
The nitrogen substituted bismuth ferrite polycrystal sample BiFeO2.1N0.9 has been successfully synthesized using sol-gel method. Its structural and magnetic properties are investigated. The formation of Fe4+ due to charge compensation is found in BiFeO2.1N0.9 from X-ray photoelectron spectra. The crystal structure of BiFeO3 is barely affected by N doping while the magnetic property is well improved. We propose that it is the coexistence of different superexchanges (Fe-N-Fe and Fe-O-Fe) that breaks the magnetic cancellation effect of the spin spiral, hence increasing the macroscopic magnetization.