Structural, magnetic and electrochemical characterization of La0.83A0.17Fe0.5Cr0.5O3_δ (A = Ba, Ca) perovskites

AK Azad; CG Eriksson; John Thomas Sirr Irvine

doi:10.1016/j.materresbull.2009.03.008

Structural, magnetic and electrochemical characterization of La_0.83A_0.17Fe_0.5Cr_0.5O₃__δ (A = Ba, Ca) perovskites

AK Azad, CG Eriksson, John Thomas Sirr Irvine

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

11 Citations (Scopus)

Abstract

The structural, magnetic and electrical properties of the perovskite-type compound La(0.83)A(0.17)Fe(0.5)Cr(0.5)O(3-delta) (A = Ba, Ca) have been investigated by neutron diffraction, magnetization measurements and conductivity measurements. Rietveld refinement of X-ray and neutron diffraction data shows that the compound adopts an orthorhombic crystal structure with Pbnm symmetry with a random positioning of the iron and chromium cations on the B sublattice. The magnetic structures at 10 K are collinear antiferromagnetic with the magnetic moment per site being equal to 2.91(2)mu(B) (for Ba) and 3.05(2)mu(B) (for Ca). Magnetization measurements confirm the overall antiferromagnetic behavior. The magnetic structure is based Oil a unit cell related to that of the nuclear structure and the magnetic cell can be considered the same as nuclear cell. Barium doped samples show lower oxygen deficiency and higher conductivity than calcium doped samples. At low oxygen pressure, both compounds show p-type electronic conduction. (c) 2009 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	1451–1457
Number of pages	7
Journal	Materials Research Bulletin
Volume	44
Issue number	7
Early online date	26 Mar 2009
DOIs	https://doi.org/10.1016/j.materresbull.2009.03.008
Publication status	Published - 1 Jul 2009

Keywords

Oxides
Chemical synthesis
Impedance spectroscopy
Crystal structure
Electrochemical properties
Magnetic properties
TEMPERATURE ELECTRICAL-CONDUCTIVITY
TRANSPORT-PROPERTIES
IONIC TRANSPORT
LA1-XSRXFEO3-DELTA
OXYGEN
NONSTOICHIOMETRY
DIFFRACTION
OXIDES
FILMS

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10.1016/j.materresbull.2009.03.008

Cite this

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title = "Structural, magnetic and electrochemical characterization of La0.83A0.17Fe0.5Cr0.5O3_δ (A = Ba, Ca) perovskites",

abstract = "The structural, magnetic and electrical properties of the perovskite-type compound La(0.83)A(0.17)Fe(0.5)Cr(0.5)O(3-delta) (A = Ba, Ca) have been investigated by neutron diffraction, magnetization measurements and conductivity measurements. Rietveld refinement of X-ray and neutron diffraction data shows that the compound adopts an orthorhombic crystal structure with Pbnm symmetry with a random positioning of the iron and chromium cations on the B sublattice. The magnetic structures at 10 K are collinear antiferromagnetic with the magnetic moment per site being equal to 2.91(2)mu(B) (for Ba) and 3.05(2)mu(B) (for Ca). Magnetization measurements confirm the overall antiferromagnetic behavior. The magnetic structure is based Oil a unit cell related to that of the nuclear structure and the magnetic cell can be considered the same as nuclear cell. Barium doped samples show lower oxygen deficiency and higher conductivity than calcium doped samples. At low oxygen pressure, both compounds show p-type electronic conduction. (c) 2009 Elsevier Ltd. All rights reserved.",

keywords = "Oxides, Chemical synthesis, Impedance spectroscopy, Crystal structure, Electrochemical properties, Magnetic properties, TEMPERATURE ELECTRICAL-CONDUCTIVITY, TRANSPORT-PROPERTIES, IONIC TRANSPORT, LA1-XSRXFEO3-DELTA, OXYGEN, NONSTOICHIOMETRY, DIFFRACTION, OXIDES, FILMS",

author = "AK Azad and CG Eriksson and Irvine, {John Thomas Sirr}",

year = "2009",

month = jul,

day = "1",

doi = "10.1016/j.materresbull.2009.03.008",

language = "English",

volume = "44",

pages = "1451–1457",

journal = "Materials Research Bulletin",

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TY - JOUR

T1 - Structural, magnetic and electrochemical characterization of La0.83A0.17Fe0.5Cr0.5O3_δ (A = Ba, Ca) perovskites

AU - Azad, AK

AU - Eriksson, CG

AU - Irvine, John Thomas Sirr

PY - 2009/7/1

Y1 - 2009/7/1

N2 - The structural, magnetic and electrical properties of the perovskite-type compound La(0.83)A(0.17)Fe(0.5)Cr(0.5)O(3-delta) (A = Ba, Ca) have been investigated by neutron diffraction, magnetization measurements and conductivity measurements. Rietveld refinement of X-ray and neutron diffraction data shows that the compound adopts an orthorhombic crystal structure with Pbnm symmetry with a random positioning of the iron and chromium cations on the B sublattice. The magnetic structures at 10 K are collinear antiferromagnetic with the magnetic moment per site being equal to 2.91(2)mu(B) (for Ba) and 3.05(2)mu(B) (for Ca). Magnetization measurements confirm the overall antiferromagnetic behavior. The magnetic structure is based Oil a unit cell related to that of the nuclear structure and the magnetic cell can be considered the same as nuclear cell. Barium doped samples show lower oxygen deficiency and higher conductivity than calcium doped samples. At low oxygen pressure, both compounds show p-type electronic conduction. (c) 2009 Elsevier Ltd. All rights reserved.

AB - The structural, magnetic and electrical properties of the perovskite-type compound La(0.83)A(0.17)Fe(0.5)Cr(0.5)O(3-delta) (A = Ba, Ca) have been investigated by neutron diffraction, magnetization measurements and conductivity measurements. Rietveld refinement of X-ray and neutron diffraction data shows that the compound adopts an orthorhombic crystal structure with Pbnm symmetry with a random positioning of the iron and chromium cations on the B sublattice. The magnetic structures at 10 K are collinear antiferromagnetic with the magnetic moment per site being equal to 2.91(2)mu(B) (for Ba) and 3.05(2)mu(B) (for Ca). Magnetization measurements confirm the overall antiferromagnetic behavior. The magnetic structure is based Oil a unit cell related to that of the nuclear structure and the magnetic cell can be considered the same as nuclear cell. Barium doped samples show lower oxygen deficiency and higher conductivity than calcium doped samples. At low oxygen pressure, both compounds show p-type electronic conduction. (c) 2009 Elsevier Ltd. All rights reserved.

KW - Oxides

KW - Chemical synthesis

KW - Impedance spectroscopy

KW - Crystal structure

KW - Electrochemical properties

KW - Magnetic properties

KW - TEMPERATURE ELECTRICAL-CONDUCTIVITY

KW - TRANSPORT-PROPERTIES

KW - IONIC TRANSPORT

KW - LA1-XSRXFEO3-DELTA

KW - OXYGEN

KW - NONSTOICHIOMETRY

KW - DIFFRACTION

KW - OXIDES

KW - FILMS

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U2 - 10.1016/j.materresbull.2009.03.008

DO - 10.1016/j.materresbull.2009.03.008

M3 - Article

SN - 0025-5408

VL - 44

SP - 1451

EP - 1457

JO - Materials Research Bulletin

JF - Materials Research Bulletin

IS - 7

ER -

Structural, magnetic and electrochemical characterization of La_0.83A_0.17Fe_0.5Cr_0.5O₃__δ (A = Ba, Ca) perovskites

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Keywords

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Structural, magnetic and electrochemical characterization of La0.83A0.17Fe0.5Cr0.5O3_δ (A = Ba, Ca) perovskites

Abstract

Keywords

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Material for high Temp FCT EP/E064248/1: Materials for High Temperature Fuel Cell Technology

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Structural, magnetic and electrochemical characterization of La_0.83A_0.17Fe_0.5Cr_0.5O₃__δ (A = Ba, Ca) perovskites