Configuracion y montaje de instrumento para la caracterizacion magnetoelectrica de compuestos ceramicos multiferroicos

CAMARGO, J.; LERE, M.; CASTRO, M.; RAMAJO, L.

REVISTA MEXICANA DE FíSICA

SOC MEXICANA FISICA

Año: 2020 vol. 66 p. 462 - 474

0035-001X

In the present work, the configuration and assembly of a device used to quantify the dynamic magnetoelectric coefficient (®) of multiferroic lead-free ceramic is analyzed. In particular, the magnetoelectric properties of Bi0,5(Na0,8K0,2)0,5TiO3-Ni0,5Co0,5Fe2O4 (BNKT-NCF) ceramics are studied. In the dynamic method, the magnetoelectric signal (ME) is recorded measuring the electrical potential across the sample under a DC magnetic field in the presence of an AC magnetic field. The measuring elements consist of a polarization system (electric and magnetic), to polarize the magnetoelectric ceramics, and a lock-in to generate the alternating signal and filter out the noise. Besides due to the low ME signal, adequate shielding and a thin electrode section are necessary close to the lock-in amplifier. The performance of the manufactured devices is satisfactory to perform the dynamic measurement of the ME effect for magnetoelectric materials based on multiferroic ceramics.