Local moments and suppression of antiferromagnetism in correlated Zr 4Fe4Si7

J. W. Simonson; M. E. Pezzoli; V. O. Garlea; G. J. Smith; J. E. Grose; J. C. Misuraca; G. Kotliar; M. C. Aronson

doi:10.1103/PhysRevB.88.081107

Local moments and suppression of antiferromagnetism in correlated Zr ⁴Fe⁴Si⁷

J. W. Simonson, M. E. Pezzoli, V. O. Garlea, G. J. Smith, J. E. Grose, J. C. Misuraca, G. Kotliar, M. C. Aronson

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Abstract

We report magnetic, transport, and neutron diffraction measurements as well as a doping study of the V-phase compound Zr⁴Fe⁴Si ⁷. This compound exhibits collinear antiferromagnetic order below T_N=98±1 K with a staggered moment of 0.57(3)μ_B/ Fe as T→ 0. The magnetic order can be quenched with Co substitution to the Fe site, but even then a 1.5μ_B/Fe paramagnetic moment remains. The resistivity and heat capacity of Zr⁴Fe⁴Si⁷ are Fermi-liquid-like below 16 and 7 K, respectively, and reveal correlations on the scale of those observed in superconducting Fe pnictides and chalcogenides. Electronic structure calculations overestimate the ordered moment, suggesting the importance of dynamical effects. The existence of magnetic order, electronic correlations, and spin fluctuations make Zr⁴Fe⁴Si ⁷ distinct from the majority of Fe-Si compounds, fostering comparison instead with the parent compounds of Fe-based superconductors.

Original language	English
Article number	081107
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	88
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevB.88.081107
State	Published - Aug 29 2013

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title = "Local moments and suppression of antiferromagnetism in correlated Zr 4Fe4Si7",

abstract = "We report magnetic, transport, and neutron diffraction measurements as well as a doping study of the V-phase compound Zr4Fe4Si 7. This compound exhibits collinear antiferromagnetic order below TN=98±1 K with a staggered moment of 0.57(3)μB/ Fe as T→ 0. The magnetic order can be quenched with Co substitution to the Fe site, but even then a 1.5μB/Fe paramagnetic moment remains. The resistivity and heat capacity of Zr4Fe4Si7 are Fermi-liquid-like below 16 and 7 K, respectively, and reveal correlations on the scale of those observed in superconducting Fe pnictides and chalcogenides. Electronic structure calculations overestimate the ordered moment, suggesting the importance of dynamical effects. The existence of magnetic order, electronic correlations, and spin fluctuations make Zr4Fe4Si 7 distinct from the majority of Fe-Si compounds, fostering comparison instead with the parent compounds of Fe-based superconductors.",

author = "Simonson, {J. W.} and Pezzoli, {M. E.} and Garlea, {V. O.} and Smith, {G. J.} and Grose, {J. E.} and Misuraca, {J. C.} and G. Kotliar and Aronson, {M. C.}",

year = "2013",

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doi = "10.1103/PhysRevB.88.081107",

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T1 - Local moments and suppression of antiferromagnetism in correlated Zr 4Fe4Si7

AU - Simonson, J. W.

AU - Pezzoli, M. E.

AU - Garlea, V. O.

AU - Smith, G. J.

AU - Grose, J. E.

AU - Misuraca, J. C.

AU - Kotliar, G.

AU - Aronson, M. C.

PY - 2013/8/29

Y1 - 2013/8/29

N2 - We report magnetic, transport, and neutron diffraction measurements as well as a doping study of the V-phase compound Zr4Fe4Si 7. This compound exhibits collinear antiferromagnetic order below TN=98±1 K with a staggered moment of 0.57(3)μB/ Fe as T→ 0. The magnetic order can be quenched with Co substitution to the Fe site, but even then a 1.5μB/Fe paramagnetic moment remains. The resistivity and heat capacity of Zr4Fe4Si7 are Fermi-liquid-like below 16 and 7 K, respectively, and reveal correlations on the scale of those observed in superconducting Fe pnictides and chalcogenides. Electronic structure calculations overestimate the ordered moment, suggesting the importance of dynamical effects. The existence of magnetic order, electronic correlations, and spin fluctuations make Zr4Fe4Si 7 distinct from the majority of Fe-Si compounds, fostering comparison instead with the parent compounds of Fe-based superconductors.

AB - We report magnetic, transport, and neutron diffraction measurements as well as a doping study of the V-phase compound Zr4Fe4Si 7. This compound exhibits collinear antiferromagnetic order below TN=98±1 K with a staggered moment of 0.57(3)μB/ Fe as T→ 0. The magnetic order can be quenched with Co substitution to the Fe site, but even then a 1.5μB/Fe paramagnetic moment remains. The resistivity and heat capacity of Zr4Fe4Si7 are Fermi-liquid-like below 16 and 7 K, respectively, and reveal correlations on the scale of those observed in superconducting Fe pnictides and chalcogenides. Electronic structure calculations overestimate the ordered moment, suggesting the importance of dynamical effects. The existence of magnetic order, electronic correlations, and spin fluctuations make Zr4Fe4Si 7 distinct from the majority of Fe-Si compounds, fostering comparison instead with the parent compounds of Fe-based superconductors.

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DO - 10.1103/PhysRevB.88.081107

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 8

M1 - 081107

ER -

Local moments and suppression of antiferromagnetism in correlated Zr ⁴Fe⁴Si⁷

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