Dielectric, Ferroelectric, and Magnetic Properties of Sm-Doped BiFeO3 Ceramics Prepared by a Modified Solid-State-Reaction Method

Abstract

Sm-doped BiFeO3 (BFO) material was prepared using a modified solid-state-reaction method, which used fast heating and cooling during the sintering process. The Sm doping level varied between 1 mol % to 8 mol %. Processing parameters, such as sintering temperature and annealing temperature, were optimized to obtain high-quality samples. Based on their dielectric properties, the optimum sintering and annealing temperatures were found to be 300 °C and 825 °C, respectively. Leakage-free square-shaped ferroelectric hysteresis loops were observed in all samples. The remnant polarization was maximized in the 5 mol %-doped sample (~35 μC/cm2). Furthermore, remnant magnetization was increased after the Sm doping and the 8 mol%-doped sample possessed the largest remnant magnetization of 0.007 emu/g. Our results demonstrated how the modified solid-state-reaction method proved to be an effective method for preparing high-quality BiFeO3 ceramics, as well as how the Sm dopant can efficiently improve ferroelectric and magnetic properties.

XPS Study in BiFeO3 Surface Modified by Argon Etching

“…Despite these appealing properties, the pure phase BFO is difficult to synthesize thanks to its high sensitivity to manufacturing conditions due to its narrow phase diagram, which increases the probability of achieving it with other recurring phases like Bi 25 FeO 39 and Bi 2 Fe 4 O 9 [5][6][7].…”

Optimizing Structural, Optical, Dielectric, and Magnetic Properties of (Bi1–xLax)FeO3 (0.00 ≤ x ≤ 0.06) Sintered Ceramics

“…The magnetoelectric effect (ME) has been observed in BFO ceramics by switching electric magnetization and polarization mutually . It is considered that BFO ceramics are a candidate material for many applications i.e., data storage devices, spintronics, transducers, and electromagnetic devices. − However, synthesis of BFO (single phase) is very difficult to perform due to (i) current leakage in samples arising due to impurity contents; (ii) formation of a thin thermal window; and (iii) oxygen vacancies and improper stoichiometric ratios. − Furthermore, the AFM behavior in BFO ceramics is the main obstacle in obtaining a larger ME effect and hence avoiding its current leakage. The doping procedure and modified synthesis method of BFO ceramics help a certain amount in restraining the aforesaid impairments.…”

Low Temperature Magnetic Transition of BiFeO3 Ceramics Sintered by Electric Field-Assisted Methods: Flash and Spark Plasma Sintering

“…Multiferroic ceramic bismuth iron oxide (BiFeO 3 ) has received considerable attention in the research community due to its unique properties of co-existence of ferroelectricity and ferromagnetism [1,2]. BiFeO 3 , in its bulk form, is a ferroelectric ceramic with a theoretical saturated polarization of 90 µC/cm 2 and a relatively high Curie temperature T C ∼1100 K [3].…”