Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb

A. E. Taylor; T. Berlijn; S. E. Hahn; A. F. May; T. J. Williams; L. Poudel; S. Calder; R. S. Fishman; M. B. Stone; A. A. Aczel; H. B. Cao; M. D. Lumsden; A. D. Christianson

doi:10.1103/PhysRevB.91.224418

Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb

A. E. Taylor, T. Berlijn, S. E. Hahn, A. F. May, T. J. Williams, L. Poudel, S. Calder, R. S. Fishman, M. B. Stone, A. A. Aczel, H. B. Cao, M. D. Lumsden, A. D. Christianson

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Abstract

We report elastic and inelastic neutron-scattering measurements of the high-TC ferromagnet Mn1+δSb. Measurements were performed on a large, TC=434 K, single crystal with an interstitial Mn content of δ≈0.13. The neutron-diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn and find the interstitial to be magnetic, in agreement with the diffraction data. The inelastic neutron-scattering measurements reveal two features in the magnetic dynamics: (i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (HK2n), and (ii) a broad, nondispersive signal centered at forbidden Bragg positions (HK2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave-theory calculations and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the interstitial Mn on the magnetic state in this system is more important than previously understood.

Original language	English
Article number	224418
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.91.224418
State	Published - Jun 15 2015

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© 2015 American Physical Society.

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Taylor, A. E., Berlijn, T., Hahn, S. E., May, A. F., Williams, T. J., Poudel, L., Calder, S., Fishman, R. S., Stone, M. B., Aczel, A. A., Cao, H. B., Lumsden, M. D., & Christianson, A. D. (2015). Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb. Physical Review B - Condensed Matter and Materials Physics, 91(22), Article 224418. https://doi.org/10.1103/PhysRevB.91.224418

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title = "Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb",

abstract = "We report elastic and inelastic neutron-scattering measurements of the high-TC ferromagnet Mn1+δSb. Measurements were performed on a large, TC=434 K, single crystal with an interstitial Mn content of δ≈0.13. The neutron-diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn and find the interstitial to be magnetic, in agreement with the diffraction data. The inelastic neutron-scattering measurements reveal two features in the magnetic dynamics: (i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (HK2n), and (ii) a broad, nondispersive signal centered at forbidden Bragg positions (HK2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave-theory calculations and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the interstitial Mn on the magnetic state in this system is more important than previously understood.",

author = "Taylor, {A. E.} and T. Berlijn and Hahn, {S. E.} and May, {A. F.} and Williams, {T. J.} and L. Poudel and S. Calder and Fishman, {R. S.} and Stone, {M. B.} and Aczel, {A. A.} and Cao, {H. B.} and Lumsden, {M. D.} and Christianson, {A. D.}",

note = "Publisher Copyright: {\textcopyright} 2015 American Physical Society.",

year = "2015",

month = jun,

day = "15",

doi = "10.1103/PhysRevB.91.224418",

language = "English",

volume = "91",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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Taylor, AE, Berlijn, T , Hahn, SE , May, AF, Williams, TJ, Poudel, L, Calder, S, Fishman, RS, Stone, MB , Aczel, AA , Cao, HB , Lumsden, MD & Christianson, AD 2015, 'Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb', Physical Review B - Condensed Matter and Materials Physics, vol. 91, no. 22, 224418. https://doi.org/10.1103/PhysRevB.91.224418

TY - JOUR

T1 - Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb

AU - Taylor, A. E.

AU - Berlijn, T.

AU - Hahn, S. E.

AU - May, A. F.

AU - Williams, T. J.

AU - Poudel, L.

AU - Calder, S.

AU - Fishman, R. S.

AU - Stone, M. B.

AU - Aczel, A. A.

AU - Cao, H. B.

AU - Lumsden, M. D.

AU - Christianson, A. D.

PY - 2015/6/15

Y1 - 2015/6/15

N2 - We report elastic and inelastic neutron-scattering measurements of the high-TC ferromagnet Mn1+δSb. Measurements were performed on a large, TC=434 K, single crystal with an interstitial Mn content of δ≈0.13. The neutron-diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn and find the interstitial to be magnetic, in agreement with the diffraction data. The inelastic neutron-scattering measurements reveal two features in the magnetic dynamics: (i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (HK2n), and (ii) a broad, nondispersive signal centered at forbidden Bragg positions (HK2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave-theory calculations and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the interstitial Mn on the magnetic state in this system is more important than previously understood.

AB - We report elastic and inelastic neutron-scattering measurements of the high-TC ferromagnet Mn1+δSb. Measurements were performed on a large, TC=434 K, single crystal with an interstitial Mn content of δ≈0.13. The neutron-diffraction results reveal that the interstitial Mn has a magnetic moment, and that it is aligned antiparallel to the main Mn moment. We perform density functional theory calculations including the interstitial Mn and find the interstitial to be magnetic, in agreement with the diffraction data. The inelastic neutron-scattering measurements reveal two features in the magnetic dynamics: (i) a spin-wave-like dispersion emanating from ferromagnetic Bragg positions (HK2n), and (ii) a broad, nondispersive signal centered at forbidden Bragg positions (HK2n+1). The inelastic spectrum cannot be modeled by simple linear spin-wave-theory calculations and appears to be significantly altered by the presence of the interstitial Mn ions. The results show that the influence of the interstitial Mn on the magnetic state in this system is more important than previously understood.

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DO - 10.1103/PhysRevB.91.224418

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SN - 1098-0121

VL - 91

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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M1 - 224418

ER -

Influence of interstitial Mn on magnetism in the room-temperature ferromagnet Mn1+δSb

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