Conduction Mechanism and Magnetic Property of Ag-Doped LaFeO3 Nanofibers

LaFeO3 nanofibers and Ag-doped LaFeO3 nanofibers were fabricated via an approach combining electrospinning with calcination. Their crystal structures, micro-morphologies, and chemical compositions were determined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. In addition, the conduction mechanisms and magnetic properties of the two samples were investigated using a semiconductor analyzer and a vibrating sample magnetometer. Rietveld refined X-ray diffraction analyses confirmed the orthorhombic structure. The two samples showed a nanofibrous structure. For Ag-doped LaFeO3, the conduction was dominated by the ohmic conduction mechanism in a low-resistance state, while it was governed by space-charge-limited current conduction in a high-resistance state. It also showed a high on/off ratio of 3.6 × 103. The coercivity and remanence values of Ag-doped LaFeO3 were 200 Oe and 0.000404 emu g−1. This, thus, indicates the considerable application potential of Ag-doped LaFeO3 for resistive random-access memory devices and magnetoresistive random-access memory devices.