Multicaloric response tuned by electric field in cylindrical MnAs/PZT magnetoelectric composite

• Published in: Journal of applied physics 2024-09, Vol.136 (11)
• Main Authors: Amirov, Abdulkarim A., Koliushenkov, Maksim A., Mukhuchev, Abdula A., Yusupov, Dibir M., Govorina, Valeriya V., Neznakhin, Dmitriy S., Govor, Gennady A., Aliev, Akhmed M.
• Format: Article
• Language: English
• Subjects: Adiabatic flow; Electric fields; Electric potential; Finite element method; Magnetic properties; Numerical analysis; Phase transitions; Piezoelectricity; Voltage
• ISSN: 0021-8979; 1089-7550
• DOI: 10.1063/5.0231720

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.