Abstract
We have studied the contribution induced by a low magnetic field (0.6T and 1.2T) on the frequency dependent permittivity, impedance and conductivity recorded at room temperature for La0.4Gd0.1Ca0.5MnO3 polycrystalline compound. Strong magnetodielectric (MD) coupling has been detected at room temperature. Colossal value of negative MD (more than 50%) has been observed under 1.2T field. The MD response is found to be stable in the studied frequency range (up to 2 MHz) suggesting the possibility of using this compound for technological applications at room temperature. The significant MD coupling has been correlated with the presence of charge ordering transition near room temperature.
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