Analysis of the microstructural and magnetodielectric behavior in multiferrioc Cr1.3Fe0.7O3 nanoparticles

Single phase Cr _1.3Fe _0.7O ₃ has been successfully prepared by wet chemical method, accompanied by the surface morphology with pure diamond shaped structure of corundum and uniform grain growth. The splitting of magnetization curves at ∼220 K during varying temperature measurement indicates the magnetocrystalline anisotropy with the coexistence of antiferromagnetic and ferromagnetic phases. The obvious dielectric relaxation behavior has been determined above ∼125 K with the activation energy of 0.0318 eV, which is attributed to the dipolar relaxation caused by short-range polaron range hopping in the magnetic grains. The arresting magnetoelectric coupling effect near room temperature is certified in Cr _1.3Fe _0.7O ₃ from ∼125 K, with the maximum coupling coefficient of 5 % at ∼212 K. These characteristics mean that the sample has potential application value in fields such as spintronics devices and magnetoelectric memories.