Nd-doped BiFeO3 ceramics with antipolar order

Karimi, Sarah; Reaney, Ian M.; Levin, Igor; Sterianou, Iasmi

doi:10.1063/1.3097222

Cited by 171 publications

(140 citation statements)

References 14 publications

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“…The latter implies the "+ + −−" sequence for the corresponding axial vectors (Fig. 2) and has been observed before in some other perovskite systems such as NaNbO 3 [40], Bi 1−x Ln x FeO 3 (Ln = lanthanide) [12,[17][18][19], and BiFe 1−x Mn x O 3 [31].…”

Section: A Crystal and Magnetic Structures Of The Antipolar Phasementioning

confidence: 99%

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Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

et al. 2014

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A metastable perovskite BiFe 0.5 Sc 0.5 O 3 synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions was obtained in two different polymorphs, antipolar P nma and polar I ma2, through an irreversible behavior under a heating/cooling thermal cycling. The I ma2 phase represents an original type of a canted ferroelectric structure where Bi 3+ cations exhibit both polar and antipolar displacements along the orthogonal [110] p and [110] p pseudocubic directions, respectively, and are combined with antiphase octahedral tilting about the polar axis. Both the P nma and the I ma2 structural modifications exhibit a long-range antiferromagnetic ordering with a weak ferromagnetic component below T N ∼ 220 K. Analysis of the coupling between the dipole, magnetic, and elastic order parameters based on a general phenomenological approach revealed that the weak ferromagnetism in both phases is mainly caused by the presence of the antiphase octahedral tilting whose axial nature directly represents the relevant part of Dzyaloshinskii vector. The magnetoelectric contribution to the spontaneous magnetization allowed in the polar I ma2 phase is described by a fifth-degree free-energy invariant and is expected to be small.

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Section: A Crystal and Magnetic Structures Of The Antipolar Phasementioning

confidence: 99%

“…One of the main doping strategies applied to BiFeO 3 is focused on lanthanum [12][13][14] or rare-earth substitution of Bi [15][16][17][18][19]. This makes it possible to keep the charge balance without changing the charge state of the Fe sublattice or oxygen stoichiometry.…”

Section: Introductionmentioning

confidence: 99%

Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

et al. 2014

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“…6 At this critical doping, the film has features of a morphotropic phase boundary ͑MPB͒ solid solution, consisting of a cell-doubled orthorhombic Pnma phase beyond the MPB and a PbZrO 3 ͑PZO͒-like structural phase in local regions below the MPB. [6][7][8] Electron and laboratory x-ray diffraction studies in Ref. 7 show a superlattice peak at 1/2-order along b in pseudocubic notation that appears to be uniquely associated with the orthorhombic phase.…”

mentioning

confidence: 99%

Phase coexistence near a morphotropic phase boundary in Sm-doped BiFeO3 films

Emery¹,

Cheng²,

Kan³

et al. 2010

Applied Physics Letters

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We have investigated heteroepitaxial films of Sm-doped BiFeO 3 with a Sm-concentration near a morphotropic phase boundary. Our high-resolution synchrotron X-ray diffraction, carried out in a temperature range of 25°C to 700°C, reveals substantial phase coexistence as one changes temperature to crossover from a low-temperature PbZrO 3 -like phase to a high-temperature orthorhombic phase. We also examine changes due to strain for films exhibiting anisotropic misfit between film and substrate. Additionally, thicker films exhibit a substantial volume collapse associated with the structural transition that is suppressed in thinner films.

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“…At present, in literature the PbZrO3-like structure detected at the MPB for Bi1-xLaxFeO3 solid solutions is the subject of many discussions regarding its symmetry 12,15,17 . This peculiar structure are also discussed for Bi1-xNdxFeO3 system 18 and NaNbO3 19,20 .…”

mentioning

confidence: 99%

Interlayer strain effects on the structural behavior of BiFeO3/LaFeO3 superlattices

Carcan

Bouyanfif

Marssi

et al. 2018

Journal of Applied Physics

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Artificial (BiFeO3)0.5 /(LaFeO3)0.5 superlattices (SLs) have been grown by pulsed laser deposition. The periodicity was varied from 150 Å to 25 Å and the relative ratio between BFO and LFO is kept constant in each period. X-ray diffraction, transmission electron microscopy (TEM) and Raman spectroscopy investigations indicate antiferroelectric-like structures for large periodicity ( ≥76 Å) while Pnma LaFeO3-like structures are observed for small periodicity ≤50 Å. Room temperature Magnetic measurements were obtained by vibrating sample magnetometry and suggest antiferromagnetic ordering with weak ferromagnetism. Temperature dependent x-ray diffraction studies show an important shift 2 of paraelectric-antiferroelectric phase transition scaling with BFO thickness. Strain and size effects explain this behavior and discussion is also made of the possible role of the oxygen octahedral rotation/tilt degree of freedom.

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Nd-doped BiFeO3 ceramics with antipolar order

Cited by 171 publications

References 14 publications

Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

Polar and antipolar polymorphs of metastable perovskiteBiFe0.5Sc0.5O3

Phase coexistence near a morphotropic phase boundary in Sm-doped BiFeO3 films

Interlayer strain effects on the structural behavior of BiFeO3/LaFeO3 superlattices

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