Direct observation of magnetodielectric effect in type-I multiferroic PbFe0.5Ti0.25W0.25O3

•Examining magnetic and dielectric properties of a type-I multiferroic where ferroelectricity and magnetism arise from different origins.•Demonstrating explicit magnetic-field-driven change of dielectric constant.•Offering essential clues for magnetoelectric correlations.•Providing potential application utilizing magnetic and dielectric quantities in the type-I multiferroic

In type-I multiferroics, where ferroelectricity and magnetism arise from different origins, the explicit measurement of magnetoelectric effect is commonly prohibited due to the weak magnetoelectric coupling. From our investigation of magnetic and dielectric properties in a perovskite PbFe0.5Ti0.25W0.25O3, we have directly demonstrated magnetic-field-driven change of dielectric constant in a highly non-linear fashion. Our result offers a potential utilization of magnetoelectric functionality in type-I multiferroics.