Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr3Ru2O7 by inelastic neutron scattering

L  Capogna; E M  Forgan; S M  Hayden; A  Wildes; J A  Duffy; A P  Mackenzie; R S  Perry; S  Ikeda; Y  Maeno; S P  Brown

doi:10.1103/PhysRevB.67.012504

Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr₃Ru₂O₇ by inelastic neutron scattering

L Capogna, E M Forgan, S M Hayden, A Wildes, J A Duffy, A P Mackenzie, R S Perry, S Ikeda, Y Maeno, S P Brown

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Abstract

We report an observation of two-dimensional incommensurate magnetic fluctuations in the layered metallic perovskiteSr₃Ru₂O₇. The wave vectors where the magnetic fluctuations are strongest are different from those observed in the superconducting single layer ruthenate Sr₂RuO₄ and appear to be determined by Fermi surface nesting. No antiferromagnetic ordering is observed for temperatures down to 1.5 K. For temperatures T greater than or similar to20 K, the fluctuations become predominately ferromagnetic. Our inelastic neutron scattering measurements provide concrete evidence of the coexistence of competing interactions in Sr₃Ru₂O₇ and of the low-energy scale of the fluctuations.

Original language	English
Article number	012504
Number of pages	4
Journal	Physical Review. B, Condensed matter and materials physics
Volume	67
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.67.012504
Publication status	Published - 1 Jan 2003

Keywords

ELECTRONIC-STRUCTURE
SINGLE-CRYSTALS
MAGNETIC ORDER
STATE
FERROMAGNETISM
CA2-XSRXRUO4
EXCITATIONS
INSTABILITY
PEROVSKITE
TRANSITION

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Capogna, L., Forgan, E. M., Hayden, S. M., Wildes, A., Duffy, J. A., Mackenzie, A. P., Perry, R. S., Ikeda, S., Maeno, Y., & Brown, S. P. (2003). Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr₃Ru₂O₇ by inelastic neutron scattering. Physical Review. B, Condensed matter and materials physics, 67(1), Article 012504. https://doi.org/10.1103/PhysRevB.67.012504

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abstract = "We report an observation of two-dimensional incommensurate magnetic fluctuations in the layered metallic perovskiteSr3Ru2O7. The wave vectors where the magnetic fluctuations are strongest are different from those observed in the superconducting single layer ruthenate Sr2RuO4 and appear to be determined by Fermi surface nesting. No antiferromagnetic ordering is observed for temperatures down to 1.5 K. For temperatures T greater than or similar to20 K, the fluctuations become predominately ferromagnetic. Our inelastic neutron scattering measurements provide concrete evidence of the coexistence of competing interactions in Sr3Ru2O7 and of the low-energy scale of the fluctuations. ",

keywords = "ELECTRONIC-STRUCTURE, SINGLE-CRYSTALS, MAGNETIC ORDER, STATE, FERROMAGNETISM, CA2-XSRXRUO4, EXCITATIONS, INSTABILITY, PEROVSKITE, TRANSITION",

author = "L Capogna and Forgan, {E M} and Hayden, {S M} and A Wildes and Duffy, {J A} and Mackenzie, {A P} and Perry, {R S} and S Ikeda and Y Maeno and Brown, {S P}",

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T1 - Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr3Ru2O7 by inelastic neutron scattering

AU - Capogna, L

AU - Forgan, E M

AU - Hayden, S M

AU - Wildes, A

AU - Duffy, J A

AU - Mackenzie, A P

AU - Perry, R S

AU - Ikeda, S

AU - Maeno, Y

AU - Brown, S P

PY - 2003/1/1

Y1 - 2003/1/1

N2 - We report an observation of two-dimensional incommensurate magnetic fluctuations in the layered metallic perovskiteSr3Ru2O7. The wave vectors where the magnetic fluctuations are strongest are different from those observed in the superconducting single layer ruthenate Sr2RuO4 and appear to be determined by Fermi surface nesting. No antiferromagnetic ordering is observed for temperatures down to 1.5 K. For temperatures T greater than or similar to20 K, the fluctuations become predominately ferromagnetic. Our inelastic neutron scattering measurements provide concrete evidence of the coexistence of competing interactions in Sr3Ru2O7 and of the low-energy scale of the fluctuations.

AB - We report an observation of two-dimensional incommensurate magnetic fluctuations in the layered metallic perovskiteSr3Ru2O7. The wave vectors where the magnetic fluctuations are strongest are different from those observed in the superconducting single layer ruthenate Sr2RuO4 and appear to be determined by Fermi surface nesting. No antiferromagnetic ordering is observed for temperatures down to 1.5 K. For temperatures T greater than or similar to20 K, the fluctuations become predominately ferromagnetic. Our inelastic neutron scattering measurements provide concrete evidence of the coexistence of competing interactions in Sr3Ru2O7 and of the low-energy scale of the fluctuations.

KW - ELECTRONIC-STRUCTURE

KW - SINGLE-CRYSTALS

KW - MAGNETIC ORDER

KW - STATE

KW - FERROMAGNETISM

KW - CA2-XSRXRUO4

KW - EXCITATIONS

KW - INSTABILITY

KW - PEROVSKITE

KW - TRANSITION

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U2 - 10.1103/PhysRevB.67.012504

DO - 10.1103/PhysRevB.67.012504

M3 - Article

SN - 1098-0121

VL - 67

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 1

M1 - 012504

ER -

Observation of two-dimensional spin fluctuations in the bilayer ruthenate Sr₃Ru₂O₇ by inelastic neutron scattering

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