Structure and magnetic properties of the cubic oxide fluoride BaFeO2F

Frank Berry; FC Coomer; Cathryn Hancock; O Helgason; EA Moore; Peter Slater; Adrian Wright; MF Thomas

doi:10.1016/j.jssc.2011.04.011

Structure and magnetic properties of the cubic oxide fluoride BaFeO2F

Frank Berry, FC Coomer, Cathryn Hancock, O Helgason, EA Moore, Peter Slater, Adrian Wright, MF Thomas

Chemistry

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Abstract

Fluorination of the parent oxide, BaFeO3- δ, with polyvinylidine fluoride gives rise to a cubic compound with a = 4.0603(4) Å at 298K. 57Fe Mössbauer spectra confirmed that all the iron is present as Fe3+. Neutron diffraction data showed complete occupancy of the anion sites indicating a composition BaFeO2F, with a large displacement of the iron off-site. The magnetic ordering temperature was determined as TN = 645±5K. Neutron diffraction data at 4.2K established G-type antiferromagnetism with a magnetic moment per Fe3+ ion of 3.95μB. However, magnetisation measurements indicated the presence of a weak ferromagnetic moment which is assigned to the canting of the antiferromagnetic structure. 57Fe Mössbauer spectra in the temperature range 10 to 300K were fitted with a model of fluoride ion distribution that retains charge neutrality of the perovskite unit cell

Original language	English
Pages (from-to)	1361-1366
Number of pages	6
Journal	Journal of Solid State Chemistry
Volume	184
Issue number	6
DOIs	https://doi.org/10.1016/j.jssc.2011.04.011
Publication status	Published - 1 Jun 2011

Keywords

Canted antiferromagnet
Oxide fluoride
BaFeO2F

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title = "Structure and magnetic properties of the cubic oxide fluoride BaFeO2F",

abstract = "Fluorination of the parent oxide, BaFeO3- δ, with polyvinylidine fluoride gives rise to a cubic compound with a = 4.0603(4) {\AA} at 298K. 57Fe M{\"o}ssbauer spectra confirmed that all the iron is present as Fe3+. Neutron diffraction data showed complete occupancy of the anion sites indicating a composition BaFeO2F, with a large displacement of the iron off-site. The magnetic ordering temperature was determined as TN = 645±5K. Neutron diffraction data at 4.2K established G-type antiferromagnetism with a magnetic moment per Fe3+ ion of 3.95μB. However, magnetisation measurements indicated the presence of a weak ferromagnetic moment which is assigned to the canting of the antiferromagnetic structure. 57Fe M{\"o}ssbauer spectra in the temperature range 10 to 300K were fitted with a model of fluoride ion distribution that retains charge neutrality of the perovskite unit cell",

keywords = "Canted antiferromagnet, Oxide fluoride, BaFeO2F",

author = "Frank Berry and FC Coomer and Cathryn Hancock and O Helgason and EA Moore and Peter Slater and Adrian Wright and MF Thomas",

year = "2011",

month = jun,

day = "1",

doi = "10.1016/j.jssc.2011.04.011",

language = "English",

volume = "184",

pages = "1361--1366",

journal = "Journal of Solid State Chemistry",

publisher = "Elsevier",

number = "6",

}

TY - JOUR

T1 - Structure and magnetic properties of the cubic oxide fluoride BaFeO2F

AU - Berry, Frank

AU - Coomer, FC

AU - Hancock, Cathryn

AU - Helgason, O

AU - Moore, EA

AU - Slater, Peter

AU - Wright, Adrian

AU - Thomas, MF

PY - 2011/6/1

Y1 - 2011/6/1

N2 - Fluorination of the parent oxide, BaFeO3- δ, with polyvinylidine fluoride gives rise to a cubic compound with a = 4.0603(4) Å at 298K. 57Fe Mössbauer spectra confirmed that all the iron is present as Fe3+. Neutron diffraction data showed complete occupancy of the anion sites indicating a composition BaFeO2F, with a large displacement of the iron off-site. The magnetic ordering temperature was determined as TN = 645±5K. Neutron diffraction data at 4.2K established G-type antiferromagnetism with a magnetic moment per Fe3+ ion of 3.95μB. However, magnetisation measurements indicated the presence of a weak ferromagnetic moment which is assigned to the canting of the antiferromagnetic structure. 57Fe Mössbauer spectra in the temperature range 10 to 300K were fitted with a model of fluoride ion distribution that retains charge neutrality of the perovskite unit cell

AB - Fluorination of the parent oxide, BaFeO3- δ, with polyvinylidine fluoride gives rise to a cubic compound with a = 4.0603(4) Å at 298K. 57Fe Mössbauer spectra confirmed that all the iron is present as Fe3+. Neutron diffraction data showed complete occupancy of the anion sites indicating a composition BaFeO2F, with a large displacement of the iron off-site. The magnetic ordering temperature was determined as TN = 645±5K. Neutron diffraction data at 4.2K established G-type antiferromagnetism with a magnetic moment per Fe3+ ion of 3.95μB. However, magnetisation measurements indicated the presence of a weak ferromagnetic moment which is assigned to the canting of the antiferromagnetic structure. 57Fe Mössbauer spectra in the temperature range 10 to 300K were fitted with a model of fluoride ion distribution that retains charge neutrality of the perovskite unit cell

KW - Canted antiferromagnet

KW - Oxide fluoride

KW - BaFeO2F

U2 - 10.1016/j.jssc.2011.04.011

DO - 10.1016/j.jssc.2011.04.011

M3 - Article

VL - 184

SP - 1361

EP - 1366

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 6

ER -

Structure and magnetic properties of the cubic oxide fluoride BaFeO2F

Abstract

Keywords

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