Enhanced multiferroic and magnetocapacitive properties of (1 - X) Ba 0.7 Ca 0.3 TiO 3-x BiFeO 3 ceramics

Cai Xia Li, Bin Yang, Shan Tao Zhang, Rui Zhang, Ye Sun, Hong Jun Zhang, Wen Wu Cao

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The structures, Curie temperature, dielectric relaxor behaviors, ferroelectricity, ferromagnetism, and magnetocapacitance of the (1-x)Ba 0.70Ca0.30TiO3-xBiFeO3 [(1-x)BCT-xBF, x = 0-0.90] solid solutions have been systematically investigated. The ceramics have coexisted tetragonal (T) and orthorhombic (O) phases when x ≤ 0.06, coexisted pseudocubic (PC) and O phases when x = 0.065, coexisted cubic and O phases when 0.07 ≤ x ≤ 0.12, PC phase when 0.21 ≤ x ≤ 0.42, coexisted T and rhombohedral (R) phases when 0.52 ≤ x ≤ 0.70, and R phase when x ≥ 0.75. Significantly, composition-dependent microstructures and Curie temperature are observed, the average grain size increases from 1.9 μm for x = 0, reaches 12.0 μm for x = 0.67, and then decreases to 1.3 μm for x = 0.90. At room temperature, the ceramics with x = 0.42-0.70 show piezoelectric properties and multiferroic behaviors, characterized by the polarization-electric field, polarization current intensity-electric field, and magnetization-magnetic field curves, the composition with x = 0.67 has maximum polarization, remnant polarization, maximum magnetization, and remnant magnetization of 15.0 μC/cm2, 9.1 μC/cm2, 0.33 emu/g, and 0.14 emu/g, respectively. In addition, the magnetocapacitance is evidenced by the increased relative dielectric constant with increasing the applied magnetic field (H). With ΔH = 8 kOe, the composition with x = 0.67 shows the largest values of (εr(H) - εr(0))/εr(0) = 2.96% at room temperature. The structure-property relationship is discussed intensively.

Original languageEnglish (US)
Pages (from-to)816-825
Number of pages10
JournalJournal of the American Ceramic Society
Volume97
Issue number3
DOIs
StatePublished - Mar 1 2014

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ceramics
polarization
magnetization
Polarization
Magnetization
Curie temperature
electric field
temperature
Chemical analysis
Electric fields
Magnetic fields
magnetic field
Ferroelectricity
Ferromagnetism
solid solution
Solid solutions
microstructure
Permittivity
grain size
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Li, Cai Xia ; Yang, Bin ; Zhang, Shan Tao ; Zhang, Rui ; Sun, Ye ; Zhang, Hong Jun ; Cao, Wen Wu. / Enhanced multiferroic and magnetocapacitive properties of (1 - X) Ba 0.7 Ca 0.3 TiO 3-x BiFeO 3 ceramics. In: Journal of the American Ceramic Society. 2014 ; Vol. 97, No. 3. pp. 816-825.
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title = "Enhanced multiferroic and magnetocapacitive properties of (1 - X) Ba 0.7 Ca 0.3 TiO 3-x BiFeO 3 ceramics",
abstract = "The structures, Curie temperature, dielectric relaxor behaviors, ferroelectricity, ferromagnetism, and magnetocapacitance of the (1-x)Ba 0.70Ca0.30TiO3-xBiFeO3 [(1-x)BCT-xBF, x = 0-0.90] solid solutions have been systematically investigated. The ceramics have coexisted tetragonal (T) and orthorhombic (O) phases when x ≤ 0.06, coexisted pseudocubic (PC) and O phases when x = 0.065, coexisted cubic and O phases when 0.07 ≤ x ≤ 0.12, PC phase when 0.21 ≤ x ≤ 0.42, coexisted T and rhombohedral (R) phases when 0.52 ≤ x ≤ 0.70, and R phase when x ≥ 0.75. Significantly, composition-dependent microstructures and Curie temperature are observed, the average grain size increases from 1.9 μm for x = 0, reaches 12.0 μm for x = 0.67, and then decreases to 1.3 μm for x = 0.90. At room temperature, the ceramics with x = 0.42-0.70 show piezoelectric properties and multiferroic behaviors, characterized by the polarization-electric field, polarization current intensity-electric field, and magnetization-magnetic field curves, the composition with x = 0.67 has maximum polarization, remnant polarization, maximum magnetization, and remnant magnetization of 15.0 μC/cm2, 9.1 μC/cm2, 0.33 emu/g, and 0.14 emu/g, respectively. In addition, the magnetocapacitance is evidenced by the increased relative dielectric constant with increasing the applied magnetic field (H). With ΔH = 8 kOe, the composition with x = 0.67 shows the largest values of (εr(H) - εr(0))/εr(0) = 2.96{\%} at room temperature. The structure-property relationship is discussed intensively.",
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Enhanced multiferroic and magnetocapacitive properties of (1 - X) Ba 0.7 Ca 0.3 TiO 3-x BiFeO 3 ceramics. / Li, Cai Xia; Yang, Bin; Zhang, Shan Tao; Zhang, Rui; Sun, Ye; Zhang, Hong Jun; Cao, Wen Wu.

In: Journal of the American Ceramic Society, Vol. 97, No. 3, 01.03.2014, p. 816-825.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Enhanced multiferroic and magnetocapacitive properties of (1 - X) Ba 0.7 Ca 0.3 TiO 3-x BiFeO 3 ceramics

AU - Li, Cai Xia

AU - Yang, Bin

AU - Zhang, Shan Tao

AU - Zhang, Rui

AU - Sun, Ye

AU - Zhang, Hong Jun

AU - Cao, Wen Wu

PY - 2014/3/1

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N2 - The structures, Curie temperature, dielectric relaxor behaviors, ferroelectricity, ferromagnetism, and magnetocapacitance of the (1-x)Ba 0.70Ca0.30TiO3-xBiFeO3 [(1-x)BCT-xBF, x = 0-0.90] solid solutions have been systematically investigated. The ceramics have coexisted tetragonal (T) and orthorhombic (O) phases when x ≤ 0.06, coexisted pseudocubic (PC) and O phases when x = 0.065, coexisted cubic and O phases when 0.07 ≤ x ≤ 0.12, PC phase when 0.21 ≤ x ≤ 0.42, coexisted T and rhombohedral (R) phases when 0.52 ≤ x ≤ 0.70, and R phase when x ≥ 0.75. Significantly, composition-dependent microstructures and Curie temperature are observed, the average grain size increases from 1.9 μm for x = 0, reaches 12.0 μm for x = 0.67, and then decreases to 1.3 μm for x = 0.90. At room temperature, the ceramics with x = 0.42-0.70 show piezoelectric properties and multiferroic behaviors, characterized by the polarization-electric field, polarization current intensity-electric field, and magnetization-magnetic field curves, the composition with x = 0.67 has maximum polarization, remnant polarization, maximum magnetization, and remnant magnetization of 15.0 μC/cm2, 9.1 μC/cm2, 0.33 emu/g, and 0.14 emu/g, respectively. In addition, the magnetocapacitance is evidenced by the increased relative dielectric constant with increasing the applied magnetic field (H). With ΔH = 8 kOe, the composition with x = 0.67 shows the largest values of (εr(H) - εr(0))/εr(0) = 2.96% at room temperature. The structure-property relationship is discussed intensively.

AB - The structures, Curie temperature, dielectric relaxor behaviors, ferroelectricity, ferromagnetism, and magnetocapacitance of the (1-x)Ba 0.70Ca0.30TiO3-xBiFeO3 [(1-x)BCT-xBF, x = 0-0.90] solid solutions have been systematically investigated. The ceramics have coexisted tetragonal (T) and orthorhombic (O) phases when x ≤ 0.06, coexisted pseudocubic (PC) and O phases when x = 0.065, coexisted cubic and O phases when 0.07 ≤ x ≤ 0.12, PC phase when 0.21 ≤ x ≤ 0.42, coexisted T and rhombohedral (R) phases when 0.52 ≤ x ≤ 0.70, and R phase when x ≥ 0.75. Significantly, composition-dependent microstructures and Curie temperature are observed, the average grain size increases from 1.9 μm for x = 0, reaches 12.0 μm for x = 0.67, and then decreases to 1.3 μm for x = 0.90. At room temperature, the ceramics with x = 0.42-0.70 show piezoelectric properties and multiferroic behaviors, characterized by the polarization-electric field, polarization current intensity-electric field, and magnetization-magnetic field curves, the composition with x = 0.67 has maximum polarization, remnant polarization, maximum magnetization, and remnant magnetization of 15.0 μC/cm2, 9.1 μC/cm2, 0.33 emu/g, and 0.14 emu/g, respectively. In addition, the magnetocapacitance is evidenced by the increased relative dielectric constant with increasing the applied magnetic field (H). With ΔH = 8 kOe, the composition with x = 0.67 shows the largest values of (εr(H) - εr(0))/εr(0) = 2.96% at room temperature. The structure-property relationship is discussed intensively.

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