Role of (La, Gd) co-doping on the enhanced dielectric and magnetic properties of BiFeO3 ceramics. Issue 3 (15th February 2016)

• Record Type: Journal Article
• Authors: Suresh, Pittala; Babu, P.D.; Srinath, S.
• Is Part Of: Ceramics international. Volume 42:Issue 3(2016)
• Page Start: 4176
• Page End: 4184
• Publication Date: 2016-02-15
• Subjects: C. Dielectric properties -- C. Magnetic properties -- Ceramics -- Ball milling; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.11.091
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The effect of the La 3+ and Gd 3+ co-doping on the structure, electric and magnetic properties of BiFeO3 (BFO) ceramics are investigated. For the compositions ( x =0 and 0≤ y ≤0.15) in the perovskite structured La x Gd y Bi1−( x + y ) FeO3 system, a tiny residual phase of Bi2 Fe4 O9 is noticed. Such a secondary phase is suppressed with the incorporation of 'La' content ( x ). The magnitude of dielectric constant ( ε r ) increases progressively by increasing the 'La' content from x =0 to 0.15 with a remarkable decrease of dielectric loss. For x =0.15, the system La x Gd y Bi1−( x + y ) FeO3 exhibits highest remanent magnetization ( Mr ) of 0.18 emu/g and coercive magnetic field ( HC ) of ~1 T in the presence of external magnetic field of 9 T at 300 K. The origin of enhanced dielectric and magnetic properties of La x Gd y Bi1−( x + y) FeO3 and the role of doping elements, La 3+, Gd 3+ has been discussed.