Details

Autor(en) / Beteiligte

• Dung, D.D.
• Doan, N.B.
• Dung, N.Q.
• Bac, L.H.
• Linh, N.H.
• Thanh, L.T.H.
• Thiet, D.V.
• Trung, N.N.
• Khang, N.C.
• Trung, T.V.
• Duc, N.V.

Titel

Role of Co dopants on the structural, optical and magnetic properties of lead-free ferroelectric Na0.5Bi0.5TiO3 materials

Ist Teil von

• Journal of science. Advanced materials and devices, 2019-12, Vol.4 (4), p.584-590

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Elektronische Zeitschriftenbibliothek - Freely accessible e-journals

Beschreibungen/Notizen

• Co-doped Na0.5Bi0.5TiO3 materials were fabricated by a sol-gel technique. The structural distortion of Co-doped Na0.5Bi0.5TiO3 materials was due to the difference between the radii of Co dopants and Ti hosts. The optical band gap decreased from 3.11 to 1.83 eV because of the local state of the Co cation in the band structure. Room temperature ferromagnetism emerged as compensation of diamagnetic background and possibly intrinsic ferromagnetic signals. The magnetic moment was determined to be ∼0.64 μB/Co at 5 K. The origin of the room temperature ferromagnetism in the Co-doped Na0.5Bi0.5TiO3 materials was also investigated through the first-principles calculation method. Our study provides physical insights into the complex magnetic nature of transition metal-doped ferroelectric perovskites and contributes to the integration of multifunctional materials into smart electronic devices. •Co-doped Na0.5Bi0.5TiO3 materials was synthesized by sol-gel method.•Magnetic properties of Na0.5Bi0.5TiO3 materials was tuned via amounts of Co.•The optical band gap values of Na0.5Bi0.5TiO3 compounds decreased from 3.11 eV to 1.83 eV for 9 mol% Co dopants.•The origin of ferromagnetism at room temperature of Co-doped Na0.5Bi0.5TiO3 materials were discussed.