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Structural, optical, and magnetic evaluation of Co-, Ni-, and Mn-modified multiferroic BiFeO3 ceramics

2021; Elsevier BV; Volume: 47; Issue: 17 Linguagem: Inglês

10.1016/j.ceramint.2021.05.176

1873-3956

Joel Neto Bispo de Sales, R.T. da Silva, Luciano Roni Silva Lara, Sérgio L. L. M. Ramos, Jaqueline S. Soares, Thiago A. S. Soares, Giovanna Machado, Sara Matte Manhabosco, Alan B. de Oliveira, H. B. de Carvalho, Ronaldo J. C. Batista, Humberto O. Stumpf, Taíse Matte Manhabosco,

Dielectric properties of ceramics

Co-, Ni-, and Mn-doped BiFeO3 (BFO) ceramics were synthesized herein through a solid-state reaction. All doped BFO samples exhibit visible-light response, and the Co- and Ni-doped BFO samples present enhanced ferromagnetic order at room temperature. All doped samples show secondary phases in minor quantities. Optical spectra reveal two absorptions bands, indicating multiple electron transitions for BFO and its secondary phases. M − H hysteresis loops suggest enhanced ferromagnetism in the Co- and Ni-doped BFO samples because of magnetic spinel CFP and NFO phases, respectively, whereas changes in oxygen vacancies and Fe–O–Fe bond angle play minor roles in the ferromagnetic behavior.