Magnetic behaviour of layered Ag(II) fluorides

Sylvia E. McLain; Michelle R. Dolgos; D. Alan Tennant; John F.C. Turner; T. E.D. Barnes; Thomas Proffen; Brian C. Sales; Robert I. Bewley

Magnetic behaviour of layered Ag(II) fluorides

Sylvia E. McLain, Michelle R. Dolgos, D. Alan Tennant, John F.C. Turner, T. E.D. Barnes, Thomas Proffen, Brian C. Sales, Robert I. Bewley

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

5 Scopus citations

Abstract

Fluoride phases that contain the spin-1/2 Ad⁹ Ag(II) ion have recently been predicted to have interesting or unusual magnetochemistry, owing to their structural similarity to the 3d⁹ Cu(II) cuprates and the covalence associated with this unusual oxidation state of silver. Here we present a comprehensive study of structure and magnetism in the layered Ag(II) fluoride Cs₂AgF₄, using magnetic susceptometry, inelastic neutron scattering techniques and both X-ray and neutron powder diffraction. We find that this material is well described as a two-dimensional ferromagnet, in sharp contrast to the high-Tc cuprates and a previous report in the literature. Analyses of the structural data show that Cs₂AgF₄ is orbitally ordered at all temperatures of measurement. Therefore, we suggest that orbital ordering may be the origin of the ferromagnetism we observe in this material.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Nature Materials
Volume	5
Issue number	7
State	Published - Jul 2006
Externally published	Yes

Cite this

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title = "Magnetic behaviour of layered Ag(II) fluorides",

abstract = "Fluoride phases that contain the spin-1/2 Ad9 Ag(II) ion have recently been predicted to have interesting or unusual magnetochemistry, owing to their structural similarity to the 3d9 Cu(II) cuprates and the covalence associated with this unusual oxidation state of silver. Here we present a comprehensive study of structure and magnetism in the layered Ag(II) fluoride Cs2AgF4, using magnetic susceptometry, inelastic neutron scattering techniques and both X-ray and neutron powder diffraction. We find that this material is well described as a two-dimensional ferromagnet, in sharp contrast to the high-Tc cuprates and a previous report in the literature. Analyses of the structural data show that Cs2AgF4 is orbitally ordered at all temperatures of measurement. Therefore, we suggest that orbital ordering may be the origin of the ferromagnetism we observe in this material.",

author = "McLain, {Sylvia E.} and Dolgos, {Michelle R.} and {Alan Tennant}, D. and Turner, {John F.C.} and Barnes, {T. E.D.} and Thomas Proffen and Sales, {Brian C.} and Bewley, {Robert I.}",

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AU - McLain, Sylvia E.

AU - Dolgos, Michelle R.

AU - Alan Tennant, D.

AU - Turner, John F.C.

AU - Barnes, T. E.D.

AU - Proffen, Thomas

AU - Sales, Brian C.

AU - Bewley, Robert I.

PY - 2006/7

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N2 - Fluoride phases that contain the spin-1/2 Ad9 Ag(II) ion have recently been predicted to have interesting or unusual magnetochemistry, owing to their structural similarity to the 3d9 Cu(II) cuprates and the covalence associated with this unusual oxidation state of silver. Here we present a comprehensive study of structure and magnetism in the layered Ag(II) fluoride Cs2AgF4, using magnetic susceptometry, inelastic neutron scattering techniques and both X-ray and neutron powder diffraction. We find that this material is well described as a two-dimensional ferromagnet, in sharp contrast to the high-Tc cuprates and a previous report in the literature. Analyses of the structural data show that Cs2AgF4 is orbitally ordered at all temperatures of measurement. Therefore, we suggest that orbital ordering may be the origin of the ferromagnetism we observe in this material.

AB - Fluoride phases that contain the spin-1/2 Ad9 Ag(II) ion have recently been predicted to have interesting or unusual magnetochemistry, owing to their structural similarity to the 3d9 Cu(II) cuprates and the covalence associated with this unusual oxidation state of silver. Here we present a comprehensive study of structure and magnetism in the layered Ag(II) fluoride Cs2AgF4, using magnetic susceptometry, inelastic neutron scattering techniques and both X-ray and neutron powder diffraction. We find that this material is well described as a two-dimensional ferromagnet, in sharp contrast to the high-Tc cuprates and a previous report in the literature. Analyses of the structural data show that Cs2AgF4 is orbitally ordered at all temperatures of measurement. Therefore, we suggest that orbital ordering may be the origin of the ferromagnetism we observe in this material.

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Magnetic behaviour of layered Ag(II) fluorides

Abstract

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