Magnetic and electrical properties of single-phase multiferroic BiFeO3

Pradhan, A. K.; Zhang, Kai; Hunter, D.; Dadson, J.B.; Loiutts, G.B.; Bhattacharya, P.; Katiyar, Rajesh K.; Zhang, Jun; Sellmyer, David J.; Roy, Utpal; Cui, Yu; Bürger, A.

doi:10.1063/1.1881775

Cited by 444 publications

(237 citation statements)

References 9 publications

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“…BiFeO 3 ͑BF͒ and PbTiO 3 ͑PT͒ were employed to form solid solutions with PFSW21 to improve the ferroelectric properties. BiFeO 3 is selected because of its multiferroism, 11,12 high ferroelectric and magnetic transition temperatures, [11][12][13][14][15] and large ferroelectric remanent polarization. 11,15 PbTiO 3 is used because of its high ferroelectric transition temperature, large polarization, and strong ability to stabilize the perovskite phase.…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric and magnetic properties of Pb(Fe2∕3W1∕3)O3-based multiferroic compounds with cation order

Tan

Wongmaneerung

McCallum

2007

Journal of Applied Physics

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BiFeO3 and PbTiO3 were introduced to a Sc-modified Pb(Fe2/3W1/3)O3 compound with strong cation order to improve the multiferroic properties. It is found that the degree of cation order decreases as the amount of BiFeO3 or PbTiO3 increases. As a result, the saturation magnetization deteriorates. Solid solutions with BiFeO3 show an increase in both ferroelectric and magnetic transition temperatures. However, the ferroelectric remanent polarization is dramatically suppressed. In contrast, solid solution with PbTiO3 leads to an increase in the ferroelectric transition temperature, a decrease in the magnetic transition temperature, and a significant enhancement of remanent polarization. BiFeO 3 and PbTiO 3 were introduced to a Sc-modified Pb͑Fe 2/3 W 1/3 ͒O 3 compound with strong cation order to improve the multiferroic properties. It is found that the degree of cation order decreases as the amount of BiFeO 3 or PbTiO 3 increases. As a result, the saturation magnetization deteriorates. Solid solutions with BiFeO 3 show an increase in both ferroelectric and magnetic transition temperatures. However, the ferroelectric remanent polarization is dramatically suppressed. In contrast, solid solution with PbTiO 3 leads to an increase in the ferroelectric transition temperature, a decrease in the magnetic transition temperature, and a significant enhancement of remanent polarization. The composition 0.93͓0.79Pb͑Fe 2/3 W 1/3 ͒O 3 -0.21Pb͑Sc 2/3 W 1/3 ͒O 3 ͔ -0.07PbTiO 3 shows the optimized properties of T max of 208 K, P r of 3.6 C / cm 2 between 120 and 210 K, T N of 209 K, and M s of 0.23 B / f.u. ͑3.7 emu/ g͒ at 10 K under 5 T.

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Section: Introductionmentioning

confidence: 99%

Ferroelectric and magnetic properties of Pb(Fe2∕3W1∕3)O3-based multiferroic compounds with cation order

Tan

Wongmaneerung

McCallum

2007

Journal of Applied Physics

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“…7,11 Both BiFeO 3 thin films and ceramics have been intensively investigated in the last years. [11][12][13][14][15][16][17][18][19] Multiferroic BiFeO 3 was discovered in the 1960s and its properties have been extensively studied. However, the electrical properties of pure BiFeO 3 have rarely been reported on and it has no commercial applications due to its room-temperature low resistivity, which may originate from uncertain oxygen stoichiometry, high defect density, and poor sample quality.…”

Section: Introductionmentioning

confidence: 99%

Chemical characterization of BiFeO3 obtained by Pechini method

Ferri¹,

Santos²,

Radovanovic³

et al. 2008

J. Braz. Chem. Soc.

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Este trabalho descreve a síntese e a caracterização de BiFeO 3 obtido a partir da rota Pechini, utilizando-se nitrato de bismuto e nitrato de ferro como precursores. Os pós foram calcinados a 800 °C em ar durante 2 h. Os difratogramas de raios X mostraram que o material apresenta duas fases, BiFeO 3 (95%) e α-Bi 2 O 3 (5%). A transição de fase ferroelétrica da amostra em 821 °C foi detectada por análise térmica diferencial. Os resultados das análises por microscopia eletrônica de varredura (SEM), espectroscopia de energia dispersiva (EDS) e fluorescência de raios X por dispersão de energia (EDX) mostraram que a amostra é quimicamente homogênea. As imagens de microscopia eletrônica de transmissão revelaram que a amostra é uniforme e apresenta partículas com formato esférico e tamanho médio de 30 nm.This work describes the synthesis and characterization of BiFeO 3 obtained by the Pechini route using bismuth nitrate and iron nitrate as precursors. The powders were annealed at 800 °C in air for 2 h. X-ray diffraction patterns showed that the material presents two phases, BiFeO 3 (95%) and α-Bi 2 O 3 (5%). The ferroelectric transition of the sample at 821 °C was detected by differential thermal analysis. Results of analyses by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and energy dispersive X-ray fluorescence (EDX) showed that the sample is chemically homogeneous. Transmission electron microscopy images revealed that the sample is uniform and contains spherical particles with an average size of 30 nm. Keywords:Pechini method, X-ray diffraction, ferroelectricity, magnetic properties IntroductionMultiferroic magnetoelectric materials are known to exhibit magnetic (ferro, anti, or ferri) and electric (ferro) ordering simultaneously at room temperature, 1 as well as interesting physical properties with possible practical applications, as in new memory devices whose polarization and magnetization states and coupling can be simultaneously exploited.2-6 BiFeO 3 is one of these few materials, along with YMnO 3 and BiMnO 3 , that have all the potential applications of both their parent ferroelectric and ferromagnetic materials.Bismuth ferrite, BiFeO 3 , belongs to the perovskite class of materials with a rhombohedrally distorted unit cell. It has the polar R3c space group, whose ions are displaced along the [111] direction relative to the ideal centrosymmetric positions.7,8 Detailed structural investigations of BiFeO 3 can be found elsewhere.9,10 The interest in this compound is due to its ferroelectric behavior with a high Curie temperature (T C ca.1100 K) and its antiferromagnetic behavior with a relatively high Néel temperature (T N ca. 650 K).7,11 Both BiFeO 3 thin films and ceramics have been intensively investigated in the last years. 11-19Multiferroic BiFeO 3 was discovered in the 1960s and its properties have been extensively studied. However, the electrical properties of pure BiFeO 3 have rarely been reported on and it has no commercial applications due to its room-temperature low resist...

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“…A similar behavior has been observed at 150 K (Figs. 3b and c) could be due to the change in magnetic ordering [36]. As matter of coincidence the bottom electrode SRO has a ferromagnetic phase transition at 150 K. Note that none of these peaks is related to SRO and a modulated effect is highly unlikely, but not impossible.…”

Section: Weak Phonon-magnon Couplingmentioning

confidence: 99%

Phonon spectroscopy near phase transition temperatures in multiferroicBiFeO3epitaxial thin films

2010

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We report a Raman scattering investigation of multiferroic bismuth ferrite (BiFeO3) epitaxial (c-axis oriented) thin films from -192 to 1000 • C. Phonon anomalies have been observed in three temperature regions: in the γ-phase from 930 • C to 950 • C; at ∼ 370 • C, Néel temperature (TN), and at ∼ -123 • C, due to a phase transition of unknown type (magnetic or structural). An attempt has been made to understand the origin of the weak phonon-magnon coupling and the dynamics of the phase sequence. The disappearance of several Raman modes at ∼ 820 • C (Tc) is compatible with the known structural phase transition and the Pbnm orthoferrite space group assigned by Arnold et al. [1]. The spectra also revealed a non-cubic β-phase from 820-930 • C and the same non-cubic phase extends through the γ-phase between 930-950 • C, in agreement with Arnold et al. [2], and an evidence of a cubic δ-phase around 1000 • C in thin films that is not stable in powder and bulk. Such a cubic phase has been theoretically predicted in [3]. Micro-Raman scattering and X-ray diffraction showed no structural decomposition in thin films during the thermal cycling from 22-1000 • C.

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Magnetic and electrical properties of single-phase multiferroic BiFeO3

Cited by 444 publications

References 9 publications

Ferroelectric and magnetic properties of Pb(Fe2∕3W1∕3)O3-based multiferroic compounds with cation order

Ferroelectric and magnetic properties of Pb(Fe2∕3W1∕3)O3-based multiferroic compounds with cation order

Chemical characterization of BiFeO3 obtained by Pechini method

Phonon spectroscopy near phase transition temperatures in multiferroicBiFeO3epitaxial thin films

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