Low magnetic field response single-phase multiferroics under high temperature
Low magnetic field response single-phase multiferroics under high temperature
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DOI：
10.1039/c4mh00202d
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发表时间：
2015-03-01
影响因子：
13.3
通讯作者：
Lu, Yalin
中科院分区：
文献类型：
--
作者：
Wang, Jianlin;Fu, Zhengping;Lu, Yalin
在室温（RT）下铁电性和铁磁性共存的单相材料目前几乎不可用，并且对于这样的材料来说，在高于RT的温度下进一步具有本征和低磁场响应磁电（ME）耦合更是罕见。在该通信中，一种新的单相Aurivillius化合物，SrBi_5Fe_（0.5）Co_（0.5）Ti_4O_（18）具有合理的内禀ME耦合。值得注意的是，这种性质出现在100摄氏度的高温下，超过了目前正在研究的所有单相多铁性材料。利用在100摄氏度和低响应磁场下可检测到的磁电容效应，证明了RT功能装置将外部磁场变化直接转换为电压输出。这种单相材料具有在高温下为多铁性的固有和低磁场响应，其可用性对于物理学的基本理解以及在感测、存储器件、量子控制等中的潜在应用是重要的。
A single-phase material where ferroelectricity and ferromagnetism coexist at roomtemperature (RT) is hardly available at present, and it is even more rare for such a material to further have an intrinsic and low magnetic field response magnetoelectric (ME) coupling at temperatures higher than RT. In this communication, a new single-phase Aurivillius compound, SrBi5Fe0.5Co0.5Ti4O18 has been discovered that exhibits a plausible intrinsic ME coupling. Remarkably, this property appears at a high temperature of 100 degrees C, surpassing all single-phase multiferroic materials currently under investigation. With a magneto-capacitance effect detectable at 100 degrees C and under a low response magnetic field, a RT functioning device was demonstrated to convert an external magnetic field variation directly into an electric voltage output. The availability of such a single-phase material with an intrinsic and low magnetic field response that is multiferroic at high temperature is important to the fundamental understanding of physics and to potential applications in sensing, memory devices, quantum control, etc.