Abstract
The injection of ferromagnetism properties to ferroelectric materials is a feasible strategy for integrating new functionalities to create next-generation electronic devices. In this study, Ni-doped lead-free ferroelectric Na0.5Bi0.5TiO3 materials were synthesized using the sol-gel method. The optical band gap was reduced from 3.12 eV to 2.23 eV for un-doped and 9 mol% Ni-doped Na0.5Bi0.5TiO3 materials, respectively, when Ni was substituted at the Ti site. The Ni-doped Na0.5Bi0.5TiO3 materials exhibited ferromagnetism at room temperature. The maximum magnetization was found to be 0.91 μB/Ni. Our work offers insight into the role of transition metals in room temperature ferromagnetism in lead-free ferroelectric materials for the creation of new types of green multiferroic materials.
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