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Magnetoelectric properties of CoFe_2O_4-BaTiO_3 core-shell structure composite studied by a magnetic pulse method

机译:Cofe_2O_4-BATIO_3磁壳结构复合材料的磁电性能通过磁脉冲法研究

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A new method using a magnetic pulse field in order to measure the ME effect of CoFe_2O_4-BaTiO_3 core-shell structure composite has been developed. This new method combines advantages of both quasi-static and dynamic ones and allows quantifying the whole ME response of the materials. The maximum ME coefficient of this composite is 5.5 and 4.2 mV/cm Oe for longitudinal and transverse measurements, respectively. These values are bigger than those measured by the lock-in technique and can be attributed to the fact that the pulse field method determines the full magnetoelectric coefficient whereas the AC method determines only the part that corresponds to the amplitude of the AC field. Both pulse duration and field sweep rate dH/dt are found to affect the ME response of the composite.
机译:已经开发了一种使用磁脉冲场的新方法,以测量Cofe_2O_4-Batio_3核 - 壳结构复合材料的ME效果。这种新方法结合了准静态和动态和动态和动态的优点,并允许量化材料的整体响应。对于纵向和横向测量,该复合材料的最大ME系数为5.5和4.2mV / cm OE。这些值大于通过锁定技术测量的值,并且可以归因于脉冲场方法确定完全磁电系数,而AC方法仅确定对应于交流场的幅度的部分。发现脉冲持续时间和场扫描速率DH / DT会影响复合材料的ME响应。

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