Multiferroic ceramics in BaO–Y2O3–Fe2O3–Nb2O5 system

Wu, Yong; Gu, Shuqing; Lin, Yiran; Hong, Zhanglian; Liu, Xiao Qiang; Chen, X.M.

doi:10.1016/j.ceramint.2010.07.022

Cited by 22 publications

(9 citation statements)

References 32 publications

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“…The filled tungsten bronze ceramics have also been investigated as the possible multiferroic materials by introducing magnetic elements [11][12][13][14][15][16][17] Sm, Eu, Gd, and Pr) [12]. In Ba 4 Ln 2 Fe 2 Nb 8 O 30 compounds, the ordered tungsten bronze structure is generally indicated, in which Ba and Ln ions properly occupy the A2 and A1 site, respectively.…”

Section: R 2 Ti 4 Nb 6 O 30 and M 5 Rti 3 Nb 7 O 30 Tungsten Bronmentioning

confidence: 99%

Structural, dielectric and magnetic properties of Ba3SrLn2Fe2Nb8O30 (Ln = La, Nd, Sm) filled tungsten bronze ceramics

Chen

Yang

Liu

et al. 2016

Journal of Alloys and Compounds

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Structural, dielectric and magnetic properties have been investigated for Ba 3 SrLn 2 Fe 2 Nb 8 O 30 (Ln=La, Nd, Sm) ceramics. The single phase tetragonal filled tungsten bronze structure in space group P4/mbm is obtained for Ba 3 SrLa 2 Fe 2 Nb 8 O 30 , while such tungsten bronze major phase is determined together with minor amount of secondary phases in Ba 3 SrNd 2 Fe 2 Nb 8 O 30 and Ba 3 SrSm 2 Fe 2 Nb 8 O 30. The saturated magnetic hysteresis loops with enhanced M r are obtained in the present ceramics at room temperature comparing to the Ba 4 Ln 2 Fe 2 Nb 8 O 30 (Ln=La, Nd, Sm) ceramics. Meanwhile, the typical relaxor behaviors are determined: a broad dielectric peak with strong frequency dispersion and the peak temperature following well with the Vogel-Fulcher relationship.

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Section: R 2 Ti 4 Nb 6 O 30 and M 5 Rti 3 Nb 7 O 30 Tungsten Bronmentioning

confidence: 99%

Structural, dielectric and magnetic properties of Ba3SrLn2Fe2Nb8O30 (Ln = La, Nd, Sm) filled tungsten bronze ceramics

Chen

Yang

Liu

et al. 2016

Journal of Alloys and Compounds

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“…Because of the great flexibility of structure, the filled tungsten bronze ceramics have been investigated as the possible multiferroic materials by introducing magnetic Fe 3+ ions into B site . An essential way to design the multiferroic tungsten bronzes is to substitute the magnetic ions such as Fe 3+ for Ti 4+ in Ba 4 R 2 Ti 4 Nb 6 O 30 (R = rear earth) and Ba 4 Bi 2 Ti 4 Nb 6 O 30 , and then a number of possible multiferroic materials with the formula of Ba 4 R 2 Fe 2 Nb 8 O 30 and Ba 4 Bi 2 Fe 2 Nb 8 O 30 can be expected.…”

Section: Possible Multiferroicity In Filled Tungsten Bronze Ceramicsmentioning

confidence: 99%

Ferroelectric Transition and Low‐Temperature Dielectric Relaxations in Filled Tungsten Bronzes

Zhu

Chen

2014

J. Am. Ceram. Soc.

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A comprehensive review on the latest development of the ferroelectric transition and low-temperature dielectric relaxations of filled tungsten bronze ceramics are presented together with some new issues. In the filled tungsten bronze ceramics M 6 -p R p Ti 2+p Nb 8 -p O 30 (p = 1, 2; M = Ba or Sr; R = rare earth or Bi), a ferroelectric transition is generally indicated together with up to three low-temperature dielectric relaxations. The ferroelectric transition is determined as 4/ mmm ? 4 mm, and the low-temperature dielectric relaxations are deeply concerned with the structure modulations due to the order/disorder of ions in A1 and A2 sites, their random cross occupancy, and the order/disorder of B-site ions. Both the ferroelectric transition and low-temperature dielectric relaxations are dominated by the composition and radius difference between A1and A2-site ions, Δr. The normal ferroelectric transition might be expected if the ratio of the biggest ion and second big ion is 2:1, otherwise the diffuse or relaxor ferroelectric is expected. Meanwhile, the larger Δr generally results in the normal ferroelectric, and the smaller Δr will lead to the diffuse or relaxor ferroelectric. Moreover, the effects of A sites order/disorder and the random cross occupancy of A-site ions are primary, and the effects of B-site ordering/disordering are secondary. The right ratio of 2:1 for A2-and A1-site ions and the large Δr should be the guidelines for designing the possible multiferroic tungsten bronzes.

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“…So the tungsten bronze ceramic have received increasing scientific attention. Usually, compounds with general formula M 5 [19]. Josse et al [20] reported that Ba 2 NdFeNb 4 O 15 with a barium ferrite secondary phase exhibited both ferroelectric and magnetic hysteresis loops at room temperature.…”

Section: Introductionmentioning

confidence: 98%

Crystal structure, dielectric and magnetic properties of Ba5NdNi1.5Nb8.5O30 tungsten bronze ceramic

Tan

Zhao

et al. 2012

Materials Chemistry and Physics

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Multiferroic ceramics in BaO–Y2O3–Fe2O3–Nb2O5 system

Cited by 22 publications

References 32 publications

Structural, dielectric and magnetic properties of Ba3SrLn2Fe2Nb8O30 (Ln = La, Nd, Sm) filled tungsten bronze ceramics

Structural, dielectric and magnetic properties of Ba3SrLn2Fe2Nb8O30 (Ln = La, Nd, Sm) filled tungsten bronze ceramics

Ferroelectric Transition and Low‐Temperature Dielectric Relaxations in Filled Tungsten Bronzes

Crystal structure, dielectric and magnetic properties of Ba5NdNi1.5Nb8.5O30 tungsten bronze ceramic

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