Effect of spatial spin modulation on the relaxation and NMR frequencies of 57Fe nuclei in a ferroelectric antiferromagnet BiFeO3

Zalesskii, A. V.; Frolov, A. A.; Zvezdin, A. K.; Gippius, A. A.; Морозова, Е. Н.; Khozeevc, D. F.; Bush, A. S.; Покатилов, В. С.

doi:10.1134/1.1499907

Cited by 59 publications

(32 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Indirect evidence of the existence of the spatially spin-modulated structure (SSMS) in BiFeO 3 was obtained [12] from the measurements of the magnetoelectric effect. The existence of SSMS with periodicity of 620Å was recently confirmed by 57 Fe NMR measurements [78].…”

Section: +mentioning

confidence: 78%

Theoretical investigation of magnetoelectric behavior inBiFeO3

et al. 2006

View full text Add to dashboard Cite

The magnetoelectric behavior of BiFeO3 has been explored on the basis of accurate density functional calculations. We are able to predict structural, electronic, magnetic, and ferroelectric properties of BiFeO3 correctly without including any strong correlation effect in the calculation. Unlike earlier calculations, the equilibrium structural parameters are found to be in very good agreement with the experimental findings. In particular, the present calculation correctly reproduced experimentally-observed elongation of cubic perovskite-like lattice along the [111] direction. At high pressure we predicted a pressure-induced structural transition from rhombohedral (R3c) to an orthorhombic (P nma) structure. The total energy calculations at expanded lattice show two lower energy ferroelectric phases (with monoclinic Cm and tetragonal P 4mm structures), closer in energy to the ground state phase. Spin-polarized band-structure calculations show that BiFeO3 will be an insulator in A-and G-type antiferromagnetic phases and a metal in C-type antiferromagnetic, ferromagnetic configurations, and in the nonmagnetic state. Chemical bonding in BiFeO3 has been analyzed using partial density-of-states, charge density, charge transfer, electron localization function, Born-effective-charge tensor, and crystal orbital Hamiltonian population analyses. Our electron localization function analysis shows that stereochemically active lone-pair electrons are present at the Bi sites which are responsible for displacements of the Bi atoms from the centro-symmetric to the noncentrosymmetric structure and hence the ferroelectricity. A large ferroelectric polarization of 88.7 µC/cm 2 is predicted in accordance with recent experimental findings, but differing by an order of magnitude from earlier experimental values. The strong spontaneous polarization is related to the large values of the Born-effective-charges at the Bi sites along with their large displacement along the [111] direction of the cubic perovskite-type reference structure. Our polarization analysis shows that partial contributions to polarization from the Fe and O atoms almost cancel each other and the net polarization present in BiFeO3 mainly (> 98%) originates from Bi atoms. We found that the large scatter in experimentally reported polarization values in BiFeO3 is associated with the large anisotropy in the spontaneous polarization.

show abstract

Section: +mentioning

confidence: 78%

Theoretical investigation of magnetoelectric behavior inBiFeO3

et al. 2006

View full text Add to dashboard Cite

show abstract

“…(2a) and (2b) reflects the behavior of changes of space modulated magnetic structure of the ferrite. An elliptic Jacobi function [16] was used to take into account the possibility of anharmonicity of Fe 3+ magnetic moments distribution in cycloid along x direction, i.e.,…”

Section: Figurementioning

confidence: 99%

Mössbauer investigations of hyperfine interactions features of 57Fe nuclei in BiFeO3 ferrite

Sobolev¹,

Presniakov²,

Rusakov³

et al. 2014

AIP Conference Proceedings

View full text Add to dashboard Cite

“…[18,19,[27][28][29][30] Using m=0.50, one obtains K u =(1.5-3)×10 −2 J/cm 3 =(0.6-1.2)×10 −5 eV/spin. This is about four times smaller than that obtained using the NMR value of m, and two times smaller than the value found using ESR.…”

Section: Methodsmentioning

confidence: 99%

“…Here f L is the relativistic inhomogeneous magne- indicated that the spin cycloid is strongly distorted at T =5 K (m=0.95), while it becomes essentially circular at room temperature (m=0.48). [18][19][20] Magnetic neutron diffraction signal is produced by the spin components normal to the scattering vector. In our experiment, the scattering vector is essentially parallel to (111), and therefore only the spin components along the cycloid propagation vector τ contribute to scattering.…”

Section: Methodsmentioning

confidence: 99%

“…Specifically, line shapes observed in NMR spin-echo measurements at T =5 K are inconsistent with this structure. [18][19][20] The NMR results were explained using an anharmonic cycloidal spin structure, which results from magnetic anisotropy in the plane of the spin rotation. Free energy density in BFO can be written [26] in the form f = f L +f exch +f an .…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Temperature-dependent properties of the magnetic order in single-crystal BiFeO3

et al. 2011

View full text Add to dashboard Cite

We report neutron diffraction and magnetization studies of the magnetic order in multiferroic BiFeO 3 . In ferroelectric monodomain single crystals, there are three magnetic cycloidal domains with propagation vectors equivalent by crystallographic symmetry. The cycloid period slowly grows with increasing temperature. The magnetic domain populations do not change with temperature except in the close vicinity of the Néel temperature, at which, in addition, a small jump in magnetization is observed. No evidence for the spin-reorientation transitions proposed in previous Raman and dielectric studies is found. The magnetic cycloid is slightly anharmonic for T =5 K. The anharmonicity is much smaller than previously reported in NMR studies. At room temperature, a circular cycloid is observed, within errors. We argue that the observed anharmonicity provides important clues for understanding electromagnons in BiFeO 3 .

show abstract

Effect of spatial spin modulation on the relaxation and NMR frequencies of 57Fe nuclei in a ferroelectric antiferromagnet BiFeO3

Cited by 59 publications

References 9 publications

Theoretical investigation of magnetoelectric behavior inBiFeO3

Theoretical investigation of magnetoelectric behavior inBiFeO3

Mössbauer investigations of hyperfine interactions features of 57Fe nuclei in BiFeO3 ferrite

Temperature-dependent properties of the magnetic order in single-crystal BiFeO3

Contact Info

Product

Resources

About