Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Control of Multiferroic properties in BiFeO3 nanoparticles.
Scientific Reports ( IF 3.8 ) Pub Date : 2019-02-28 , DOI: 10.1038/s41598-019-39517-3 Diego Carranza-Celis 1 , Alexander Cardona-Rodríguez 1 , Jackeline Narváez 1 , Oscar Moscoso-Londono 2, 3 , Diego Muraca 2 , Marcelo Knobel 2 , Nancy Ornelas-Soto 4 , Andreas Reiber 5 , Juan Gabriel Ramírez 1
Scientific Reports ( IF 3.8 ) Pub Date : 2019-02-28 , DOI: 10.1038/s41598-019-39517-3 Diego Carranza-Celis 1 , Alexander Cardona-Rodríguez 1 , Jackeline Narváez 1 , Oscar Moscoso-Londono 2, 3 , Diego Muraca 2 , Marcelo Knobel 2 , Nancy Ornelas-Soto 4 , Andreas Reiber 5 , Juan Gabriel Ramírez 1
Affiliation
|
BiFeO3 (BFO) nanoparticles (NPs) were synthesized using the sol-gel method at different calcination temperatures from 400 °C to 600 °C. XRD studies have confirmed that all BFO NPs show distorted rhombohedral crystals that match the R3c space group. We found evidence of local structural strain that develops with increasing particle size as suggested by TEM and Raman spectroscopy measurements. Magnetic measurements suggest that NPs have two distinct regimes: a ferromagnetic-like one at low temperatures and a superparamagnetic-like one at room temperature. The crossover temperature increases with NPs size, suggesting a size-dependent blocking magnetic regime. Similarly, local piezoelectric measurements at room temperature in single NP have confirmed a ferroelectric order with a NP size-dependent d33 coefficient. An analysis of both the ferroelectric and the magnetic results suggest that ferromagnetism and ferroelectricity coexist at room temperature in NPs. Our results lead to the possibility of tailoring the ferroic order in multifunctional materials by means of NP size.
更新日期：2019-02-28
京公网安备 11010802027423号