Abdulkarim A. Amirov, Maksim A. Koliushenkov, Abdula A. Mukhuchev, Dibir M. Yusupov, Valeriya V. Govorina, Dmitriy S. Neznakhin, Gennady A. Govor, Akhmed M. Aliev
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引用次数: 0
摘要
在圆柱型磁电复合材料 MnAs/PZT 上观察到了通过准等静压产生的反向压电效应来实现电场控制多磁性响应的可能性。研究表明,在 MnAs/PZT 复合材料的压电元件 PZT 的壁上施加 100 V 的电压(对应于 E ∼ 0.3 kV/mm 的电场),可使最大绝热温度变化增加 0.使用有限元法进行的数值分析表明,100 V 的电场电压能够在圆柱形 PZT 管内部区域产生 ∼3 MPa 的准等静压机械应力。此外,在高达 10 兆帕的微弱压力区域,压电机械压缩对总绝热温度变化的贡献与电场电压成线性关系,可用于控制多热体材料的磁性和热量特性。
Multicaloric response tuned by electric field in cylindrical MnAs/PZT magnetoelectric composite
The possibility observation of the electric field controlled multicaloric response through quasi-isostatic compression as a result of the converse piezoelectric effect was demonstrated on the cylindrical type magnetoelectric composite MnAs/PZT. It was shown that an electric voltage of 100 V corresponding to an electric field of E ∼0.3 kV/mm applied to the walls of the piezoelectric component PZT of the MnAs/PZT composite contributes to an increase in the maximum adiabatic temperature change by 0.2 K in the temperature range of the magnetostructural phase transition of MnAs ∼317 K at a magnetic field change of 1.8 T. Numerical analysis using the finite element method has shown that an electric field voltage of 100 V is capable of creating a quasi-isostatic mechanical stress in the region inside a cylindrical PZT tube of ∼3 MPa. Moreover, in the region of weak pressures up to 10 MPa, the contribution to the total adiabatic temperature change from piezo-mechanical compression linearly depends on the electrical voltage that can be used for control by magnetic and caloric properties of multicaloric materials.
期刊介绍:
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