X-ray diffraction analysis and specific heat capacity of (Bi1-xLax)FeO3 perovskites

J. R. Chen; W. L. Wang; J. B. Li; G. H. Rao

doi:10.1016/j.jallcom.2007.05.034

X-ray diffraction analysis and specific heat capacity of (Bi_1-xLa_x)FeO₃ perovskites

J. R. Chen, W. L. Wang, J. B. Li^*, G. H. Rao

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

65 Citations (Scopus)

Abstract

Phase relations of BiFeO₃-LaFeO₃ system at room temperature were investigated by X-ray powder diffraction. A rhombohedral (R3c) phase exists in the composition range of 0 ≤ x ≤ 0.1 and an orthorhombic (Pbnm) phase in the range of 0.6 < x ≤ 1.0. Thermal expansion of single-phase samples with x = 0, 0.1, 0.7, 0.9 and 1.0 was studied by temperature-dependent X-ray diffraction. The temperature dependences of expansion coefficients of the samples were obtained. Specific heat capacity of the samples with x = 0, 0.1, 0.8 and 1.0 was measured in the temperature range of 200-760 K by a modulated-temperature differential scanning calorimeter. The phase boundaries of the antiferromagnetic-paramagnetic transition were determined.

Original language	English
Pages (from-to)	66-70
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	459
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2007.05.034
Publication status	Published - 14 Jul 2008
Externally published	Yes

Keywords

(BiLa)FeO oxide materials
Heat capacity
Thermal analysis
X-ray diffraction

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10.1016/j.jallcom.2007.05.034

Cite this

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title = "X-ray diffraction analysis and specific heat capacity of (Bi1-xLax)FeO3 perovskites",

abstract = "Phase relations of BiFeO3-LaFeO3 system at room temperature were investigated by X-ray powder diffraction. A rhombohedral (R3c) phase exists in the composition range of 0 ≤ x ≤ 0.1 and an orthorhombic (Pbnm) phase in the range of 0.6 < x ≤ 1.0. Thermal expansion of single-phase samples with x = 0, 0.1, 0.7, 0.9 and 1.0 was studied by temperature-dependent X-ray diffraction. The temperature dependences of expansion coefficients of the samples were obtained. Specific heat capacity of the samples with x = 0, 0.1, 0.8 and 1.0 was measured in the temperature range of 200-760 K by a modulated-temperature differential scanning calorimeter. The phase boundaries of the antiferromagnetic-paramagnetic transition were determined.",

keywords = "(BiLa)FeO oxide materials, Heat capacity, Thermal analysis, X-ray diffraction",

author = "Chen, {J. R.} and Wang, {W. L.} and Li, {J. B.} and Rao, {G. H.}",

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doi = "10.1016/j.jallcom.2007.05.034",

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T1 - X-ray diffraction analysis and specific heat capacity of (Bi1-xLax)FeO3 perovskites

AU - Chen, J. R.

AU - Wang, W. L.

AU - Li, J. B.

AU - Rao, G. H.

PY - 2008/7/14

Y1 - 2008/7/14

N2 - Phase relations of BiFeO3-LaFeO3 system at room temperature were investigated by X-ray powder diffraction. A rhombohedral (R3c) phase exists in the composition range of 0 ≤ x ≤ 0.1 and an orthorhombic (Pbnm) phase in the range of 0.6 < x ≤ 1.0. Thermal expansion of single-phase samples with x = 0, 0.1, 0.7, 0.9 and 1.0 was studied by temperature-dependent X-ray diffraction. The temperature dependences of expansion coefficients of the samples were obtained. Specific heat capacity of the samples with x = 0, 0.1, 0.8 and 1.0 was measured in the temperature range of 200-760 K by a modulated-temperature differential scanning calorimeter. The phase boundaries of the antiferromagnetic-paramagnetic transition were determined.

AB - Phase relations of BiFeO3-LaFeO3 system at room temperature were investigated by X-ray powder diffraction. A rhombohedral (R3c) phase exists in the composition range of 0 ≤ x ≤ 0.1 and an orthorhombic (Pbnm) phase in the range of 0.6 < x ≤ 1.0. Thermal expansion of single-phase samples with x = 0, 0.1, 0.7, 0.9 and 1.0 was studied by temperature-dependent X-ray diffraction. The temperature dependences of expansion coefficients of the samples were obtained. Specific heat capacity of the samples with x = 0, 0.1, 0.8 and 1.0 was measured in the temperature range of 200-760 K by a modulated-temperature differential scanning calorimeter. The phase boundaries of the antiferromagnetic-paramagnetic transition were determined.

KW - (BiLa)FeO oxide materials

KW - Heat capacity

KW - Thermal analysis

KW - X-ray diffraction

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U2 - 10.1016/j.jallcom.2007.05.034

DO - 10.1016/j.jallcom.2007.05.034

M3 - Article

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SN - 0925-8388

VL - 459

SP - 66

EP - 70

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

X-ray diffraction analysis and specific heat capacity of (Bi_1-xLa_x)FeO₃ perovskites

Abstract

Keywords

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