Origin of magnetic excitation gap in double perovskite Sr2FeOsO6

A. E. Taylor; R. Morrow; M. D. Lumsden; S. Calder; M. H. Upton; A. I. Kolesnikov; M. B. Stone; R. S. Fishman; A. Paramekanti; P. M. Woodward; A. D. Christianson

doi:10.1103/PhysRevB.98.214422

Origin of magnetic excitation gap in double perovskite Sr2FeOsO6

A. E. Taylor, R. Morrow, M. D. Lumsden, S. Calder, M. H. Upton, A. I. Kolesnikov, M. B. Stone, R. S. Fishman, A. Paramekanti, P. M. Woodward, A. D. Christianson

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Abstract

Sr2FeOsO6 is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 (TN1) and 67 K (TN2). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr2FeOsO6. The INS data reveal that the spectrum of spin excitations remains ungapped below TN1, however below TN2 a gap of 6.8 meV develops. The RIXS data reveals splitting of the T2g multiplet consistent with that seen in other 5d3 osmium based double perovskites. Together these results suggest that spin-orbit coupling is important for ground state selection in 3d-5d3 double perovskite materials.

Original language	English
Article number	214422
Journal	Physical Review B
Volume	98
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.98.214422
State	Published - Dec 12 2018

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© 2018 American Physical Society.

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title = "Origin of magnetic excitation gap in double perovskite Sr2FeOsO6",

abstract = "Sr2FeOsO6 is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 (TN1) and 67 K (TN2). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr2FeOsO6. The INS data reveal that the spectrum of spin excitations remains ungapped below TN1, however below TN2 a gap of 6.8 meV develops. The RIXS data reveals splitting of the T2g multiplet consistent with that seen in other 5d3 osmium based double perovskites. Together these results suggest that spin-orbit coupling is important for ground state selection in 3d-5d3 double perovskite materials.",

author = "Taylor, {A. E.} and R. Morrow and Lumsden, {M. D.} and S. Calder and Upton, {M. H.} and Kolesnikov, {A. I.} and Stone, {M. B.} and Fishman, {R. S.} and A. Paramekanti and Woodward, {P. M.} and Christianson, {A. D.}",

note = "Publisher Copyright: {\textcopyright} 2018 American Physical Society.",

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doi = "10.1103/PhysRevB.98.214422",

language = "English",

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T1 - Origin of magnetic excitation gap in double perovskite Sr2FeOsO6

AU - Taylor, A. E.

AU - Morrow, R.

AU - Lumsden, M. D.

AU - Calder, S.

AU - Upton, M. H.

AU - Kolesnikov, A. I.

AU - Stone, M. B.

AU - Fishman, R. S.

AU - Paramekanti, A.

AU - Woodward, P. M.

AU - Christianson, A. D.

PY - 2018/12/12

Y1 - 2018/12/12

N2 - Sr2FeOsO6 is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 (TN1) and 67 K (TN2). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr2FeOsO6. The INS data reveal that the spectrum of spin excitations remains ungapped below TN1, however below TN2 a gap of 6.8 meV develops. The RIXS data reveals splitting of the T2g multiplet consistent with that seen in other 5d3 osmium based double perovskites. Together these results suggest that spin-orbit coupling is important for ground state selection in 3d-5d3 double perovskite materials.

AB - Sr2FeOsO6 is an insulating double perovskite compound which undergoes antiferromagnetic transitions at 140 (TN1) and 67 K (TN2). To study the underlying electronic and magnetic interactions giving rise to this behavior we have performed inelastic neutron scattering (INS) and resonant inelastic x-ray scattering (RIXS) experiments on polycrystalline samples of Sr2FeOsO6. The INS data reveal that the spectrum of spin excitations remains ungapped below TN1, however below TN2 a gap of 6.8 meV develops. The RIXS data reveals splitting of the T2g multiplet consistent with that seen in other 5d3 osmium based double perovskites. Together these results suggest that spin-orbit coupling is important for ground state selection in 3d-5d3 double perovskite materials.

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DO - 10.1103/PhysRevB.98.214422

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JO - Physical Review B

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ER -

Origin of magnetic excitation gap in double perovskite Sr2FeOsO6

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