Setup for Magnetoelectric Measurement in a Wide Temperature Range.

An experimental setup is designed and developed to measure magnetoelectric (ME) voltage, following the dynamic method. Excitation magnetic field of frequency 220Hz and amplitude of 20Oe is employed to induce the ME voltage which in turn is measured using the lock-in technique. Field dependence of the ME voltage is also measured in the magnetic field ranging -10kOe to +10kOe. In this setup the measurement can be carried out in the temperature range 400K to 125K using the combination of heater and liquid nitrogen. Calibration of the setup is done using Cr₂O₃ as standard. After calibration, a test measurement is done on BiFeO₃; a well know ME material. Temperature and magnetic field dependence of ME voltage measurement on polycrystalline BiFeO₃ is carried out. Theoretically predicted linear behavior of ME in case of BiFeO3, is well reproduced here. [ABSTRACT FROM AUTHOR]