Evolution of structural transition, grain growth inhibition and collinear antiferromagnetism in (Bi1-xSmx)FeO3 (x=0 to 0.3) and their effects on dielectric and magnetic properties

被引:20
作者
Deka, Bipul [1 ]
Ravi, S. [1 ]
Pamu, D. [1 ]
机构
[1] Indian Inst Technol Guwahati, Dept Phys, Gauhati 781039, India
关键词
Sm substituted BiFeO3; Dielectric relaxation; Collinear antiferromagnetism; Exchange bias; ELECTRICAL-PROPERTIES; MULTIFERROIC BIFEO3; CRYSTAL-STRUCTURE; RAMAN-SCATTERING; SM-SUBSTITUTION; MICROSTRUCTURE;
D O I
10.1016/j.ceramint.2017.09.046
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Structural phase transition from rhombohedral (space group: R3c) to orthorhombic (space group: Pnma) cell is observed in Bi1-xSmxFeO3 (x = 0 - 0.3) compounds. The evolution of non-ferroelectric Prima phase reduces the dielectric strength and stabilizes the collinear antiferromagnetism. Temperature variations of dielectric permittivity and its loss component show the presence of Polomska transition and it is found to shift downward towards room temperature with increase in Sm concentration. The frequency dispersion of complex dielectric permittivity was best explained in terms of Havriliak-Negami equation and by invoking the conductivity contribution. The Cole-Cole plots of complex dielectric permittivity show two distinct semicircular arcs corresponding to dielectric relaxation due to grains and grain boundaries respectively. The relaxation dynamics is explained in terms of polaron hopping across Fe2+ and Fe3+ sites in grains and short range movement of oxygen vacancies at grain boundaries. The composition dependence of magnetization is explained in terms of evolution of weak ferromagnetism due to partial breaking of spiral spin structure and the growth of collinear anti ferromagnetism driven by Pnma phase. We have also observed the exchange bias behavior in some of Sm substituted samples due to the exchange interaction at the interface of coexisting weak ferromagnetic (R3c) and collinear antiferromagnetic (Pnma) phases.
引用
收藏
页码:16580 / 16592
页数:13
相关论文
共 55 条
  • [1] Large difference between the magnetic properties of Ba and Ti co-doped BiFeO3 bulk materials and their corresponding nanoparticles prepared by ultrasonication
    Ahmmad, Bashir
    Kanomata, Kensaku
    Koike, Kunihiro
    Kubota, Shigeru
    Kato, Hiroaki
    Hirose, Fumihiko
    Billah, Areef
    Jalil, M. A.
    Basith, M. A.
    [J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2016, 49 (26)
  • [2] Dielectric relaxor and ferroelectric relaxor:: Bi-doped paraelectric SrTiO3
    Ang, C
    Yu, Z
    [J]. JOURNAL OF APPLIED PHYSICS, 2002, 91 (03) : 1487 - 1494
  • [3] [Anonymous], J PHYS CONDENS MATTE
  • [4] Dielectric characterization of a thermotropic liquid crystalline copolyesteramide: 1. Relaxation peak assignment
    Boersma, A
    van Turnhout, J
    Wubbenhorst, M
    [J]. MACROMOLECULES, 1998, 31 (21) : 7453 - 7460
  • [5] Dynamics of electron density, spin-phonon coupling, and dielectric properties of SmFeO3 nanoparticles at the spin-reorientation temperature: Role of exchange striction
    Chaturvedi, Smita
    Shyam, Priyank
    Apte, Amey
    Kumar, Jitender
    Bhattacharyya, Arpan
    Awasthi, A. M.
    Kulkarni, Sulabha
    [J]. PHYSICAL REVIEW B, 2016, 93 (17)
  • [6] Grain growth in CeO2: Dopant effects, defect mechanism, and solute drag
    Chen, PL
    Chen, IW
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (07) : 1793 - 1800
  • [7] Influence of Mn and Nb dopants on electric properties of chemical-solution-deposited BiFeO3 films
    Chung, Chin-Feng
    Lin, Jen-Po
    Wu, Jenn-Ming
    [J]. APPLIED PHYSICS LETTERS, 2006, 88 (24)
  • [8] Microstructure and properties of Sm-substituted BiFeO3 ceramics
    Dai Haiyang
    Chen Zhenping
    Li Tao
    Li Yong
    [J]. JOURNAL OF RARE EARTHS, 2012, 30 (11) : 1123 - 1128
  • [9] Structural and multiferroic properties of La-modified BiFeO3 ceramics
    Das, S. R.
    Choudhary, R. N. P.
    Bhattacharya, P.
    Katiyar, R. S.
    Dutta, P.
    Manivannan, A.
    Seehra, M. S.
    [J]. JOURNAL OF APPLIED PHYSICS, 2007, 101 (03)
  • [10] Multiferroic and magnetoelectric materials
    Eerenstein, W.
    Mathur, N. D.
    Scott, J. F.
    [J]. NATURE, 2006, 442 (7104) : 759 - 765