Effects of Structural Collapse and Magnetic Moment on Magnetization in } (\leq 0.1) Multiferroics

• Published in: IEEE transactions on magnetics 2012-11, Vol.48 (11), p.4022-4025
• Main Authors: Cheng, G. F., Lv, B., Ruan, Y. J., Huang, Y. H., Wu, X. S.
• Format: Article
• Language: English
• Subjects: Barium; BiFeO _{3} co-doping with Pr and Ba; Conductivity; electromagnetic coupling; Magnetic hysteresis; magnetic moment; Magnetic moments; Magnetism; Magnetization; Materials science; structural collapse; Temperature measurement; X-ray scattering
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2012.2204729

The structural, magnetic, and ferroelectric properties of polycrystalline Bi 0.8-x Pr x Ba 0.2 FeO 3 (0.0 ≤ x ≤ 0.1) ceramics are studied systematically. The symmetry of the unit cell with Ba and Pr substitution in BiFeO 3 in the substitution range remains the cubic with the space group of Pm 3 m . The additive of Pr in (BiBa)FeO 3 reduces the unit cell volume together with varying the lattice parameters without changing the unit cell symmetry. The distortion of FeO 6 octahedron resulting from the additive of Pr may induce the collapse of the spatial spin structure, which may enhance the spontaneous magnetization significantly. The remnant magnetization ( Mr ) increases monotonically with increasing the content of Pr, which probably originates from the ferromagnetic arrangement of Pr-ions and Fe-ions in the unit cell. The conductivity increases in a wide temperature regime result in an obvious leakage observed with increasing the Pr concentration.