Electronic and local structures of Mn-doped BiFeO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow /><mml:mn>3</mml:mn></mml:msub></mml:math>crystals

Yoneda, Yasuhiro; Kitanaka, Yuuki; Noguchi, Yuji; Miyayama, Masaru

doi:10.1103/physrevb.86.184112

Cited by 62 publications

(35 citation statements)

References 39 publications

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“…Saturation magnetization (Ms) and remanent magnetization (Mr) of the compounds both decrease along with the Mn content increases from 5% to 10% as been observed in Bi 0.84 Pr 0.16 Fe 1À z Mn z O 3 [17]. Co-doping of 5% Mn and 5% Zn makes a difference to magnetic property indicating the phenomenon is due to the cooperation of Zn and Mn substitution effect [15]. In …”

Section: Resultsmentioning

confidence: 85%

“…97591), the Rietveld refinement shows the obtained BFO sample is in the rhombohedral symmetry (R3c) with lattice parameters a ¼ b ¼ 5.5810 Å and c ¼ 13.8709 Å. The introduction of Zn makes no change in crystal texture, but leads to a decrease in crystallinity, resulting from the relatively larger ionic radius of Zn 2 þ (0.75 Å) compared with Fe 3 þ (0.64 Å), Fe 2 þ (0.78 Å) [15]. Expanded scan of (104) and Further increasing the ratio of Zn to 10% also induces to the content increase of secondary phase Bi 2 O 3 compared with BFO.…”

Section: Resultsmentioning

confidence: 98%

“…When Fe is substituted by Mn and Zn in high-quality BFO crystal, the substituted Mn has various valence states depending on the environment, such as the presence of oxygen deficiency [15]. The replacement may suppress the formation of Fe 2 þ and oxygen vacancies because of the requirement of charge compensation.…”

Section: Introductionmentioning

confidence: 99%

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Substitution-driven structural, optical and magnetic transformation of Mn, Zn doped BiFeO

Han

Quan

et al. 2015

Ceramics International

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 98%

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Substitution-driven structural, optical and magnetic transformation of Mn, Zn doped BiFeO

Han

Quan

et al. 2015

Ceramics International

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“…Because the ferroelectricity in BFO originates from the Bi 3+ 6s 2 lone pair, Bi-site modification direct influences Bi-O bonding modifying the off-center displacement of the cation. Studies on Mn-doped BFO bulk materials showed that Mn substitution at the Fe site changed both structural and electronic properties, resulting in a phase transition from the R 3 c space group to the Pnma space group101112. Recent research demonstrated that Bi was also affected by Mn substitution due to Fe 3 d -O 2 p -Bi 6 s electron hybridization1112.…”

mentioning

confidence: 99%

“…Studies on Mn-doped BFO bulk materials showed that Mn substitution at the Fe site changed both structural and electronic properties, resulting in a phase transition from the R 3 c space group to the Pnma space group101112. Recent research demonstrated that Bi was also affected by Mn substitution due to Fe 3 d -O 2 p -Bi 6 s electron hybridization1112. Thus, while modification of the Bi-site in BFO lattice tends to induce an antiferroelectric structure, structural transitions are also promoted by Mn substitution at the Fe-site.…”

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confidence: 99%

Bi deficiency-tuned functionality in multiferroic Bi1-δFe0.95Mn0.05O3 films

Chen

Wang

et al. 2016

Sci Rep

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Structural evolution and ferroelectric (FE)-to-antiferroelectric (AFE) transition behaviors were observed in Bi1-δFe0.95Mn0.05O3 (100)-textured films with a carefully controlled Bi deficiency concentration δ. Raman spectra revealed an orthorhombic structural transition induced by Mn substitution. The polarization-electric field hysteresis loops and capacitance-voltage loops of Bi1-δFe0.95Mn0.05O3 films clearly demonstrated antiferroelectric behavior with increasing δ. The responses of the domain structure of the Bi1-δFe0.95Mn0.05O3 film under positive and negative applied voltages directly suggested the coexistence of FE and AFE phases. The existence of (100) superstructure reflections and antiparallel displacements of the Bi atoms along the [100] direction observed by transmission electron microscopy unambiguously reveal the AFE phase. The chemical substitution-induced orthorhombic structural transition in BiFe0.95Mn0.05O3 film implies that as the δ concentration increases, the changes in Bi-O bonding and the stereochemical activity of Bi 6s lone pair affect both the ferroelectric distortion and the antiferrodistortive rotation and therefore drive the Bi1-δFe0.95Mn0.05O3 crystal lattice to form a PbZrO3-type orthorhombic phase with an AFE order. A continuing increase in Bi deficiency creates defect dipole complexes which produce an internal field leading to a preferred direction of the ferroelectric domain. The Bi deficiency in multiferroic BiFeO3 provides a new route by which to tune functionality.

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Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Zheng

et al. 2022

Adv Elect Materials

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Mn‐doping is reported to be an effective strategy to obtain better electrical property in bismuth ferrite‐barium titanate (BF‐BT)‐based ceramics, while the property regulation principle and its potential physical mechanism is still poorly understood. For disclose the veil of Mn‐doping enhancing properties, the typical material system BF‐BT–xMnO2 mol% is designed and the effects of Mn‐doping on multilevel structures and external fields stimulated electrical properties are deeply investigated. Mn‐doping induced structure disorder and defect dipoles lead to the formation of nanodomain and the variation of local structure, contributing to intrinsic enhancement of polarization. Especially, electrical properties under different electric and temperature fields reveal that there is a competitive control of domain switching by defects and domain configuration, which is also verified by domain writing technology and switching spectroscopy piezore‐sponse force microscopy. That is, the defect dipoles have pinning effect on domain to hinder domain switching, leading to smaller polarization and indistinctive electrostrain at low fields. While the nanodomain reduces intrinsic coercive field and promotes domain switching, generating much larger polarization and electrostrain at high fields. lt is believed the decoding of domain switching behavior controlled by defect and domain can provide a paradigm to understand the property evolution in chemically modified BF‐BT.

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Electronic and local structures of Mn-doped BiFeO3crystals

Cited by 62 publications

References 39 publications

Substitution-driven structural, optical and magnetic transformation of Mn, Zn doped BiFeO

Substitution-driven structural, optical and magnetic transformation of Mn, Zn doped BiFeO

Bi deficiency-tuned functionality in multiferroic Bi1-δFe0.95Mn0.05O3 films

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

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