Abstract

CAMARGO, J.; LERE, M.; CASTRO, M.  and  RAMAJO, L.. Configuración y montaje de instrumento para la caracterización magnetoeléctrica de compuestos cerámicos multiferroicos. Rev. mex. fis. [online]. 2020, vol.66, n.4, pp.462-474.  Epub Jan 31, 2022. ISSN 0035-001X.  https://doi.org/10.31349/revmexfis.66.462.

In the present work, the configuration and assembly of a device used to quantify the dynamic magnetoelectric coefficient ($\alpha$) of multiferroic lead-free ceramic is analyzed. In particular, the magnetoelectric properties of Bi0.5 (Na0.8K0.2)0.5 TiO3-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.

Keywords : Instrumentation; magnetoelectric coefficient; multiferroic materials.

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