Spin-wave excitation in the antiferromagnetic bilayer ruthenate Ca 3Ru2O7

X. Ke, Tao Hong, J. Peng, S. E. Nagler, G. E. Granroth, M. D. Lumsden, Z. Q. Mao

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We study the spin-wave excitation spectrum of the antiferromagnetic bilayer ruthenate Ca3Ru2O7 through inelastic neutron scattering measurements. The material behaves as a quasi-two-dimensional ferromagnetic bilayer system with very weak interbilayer antiferromagnetic coupling, and its magnetic dispersion can be well described with a nearest-neighbor Heisenberg model. We find that the intrabilayer exchange interaction along the out-of-plane c-axis is much stronger than the in-plane intralayer interaction, in sharp contrast to the previously reported bilayer manganite system. And our study reveals a finite lifetime effect of the magnetic excitation, presumably attributable to the existence of a small number of itinerant charge carriers within the planes.

Original languageEnglish (US)
Article number014422
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number1
DOIs
StatePublished - Jul 11 2011

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Inelastic neutron scattering
Spin waves
Exchange interactions
wave excitation
Charge carriers
magnons
magnetic dispersion
charge carriers
inelastic scattering
neutron scattering
interactions
life (durability)
excitation
manganite

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Ke, X. ; Hong, Tao ; Peng, J. ; Nagler, S. E. ; Granroth, G. E. ; Lumsden, M. D. ; Mao, Z. Q. / Spin-wave excitation in the antiferromagnetic bilayer ruthenate Ca 3Ru2O7. In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 84, No. 1.
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Spin-wave excitation in the antiferromagnetic bilayer ruthenate Ca 3Ru2O7. / Ke, X.; Hong, Tao; Peng, J.; Nagler, S. E.; Granroth, G. E.; Lumsden, M. D.; Mao, Z. Q.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 1, 014422, 11.07.2011.

Research output: Contribution to journalArticle

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AU - Lumsden, M. D.

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AB - We study the spin-wave excitation spectrum of the antiferromagnetic bilayer ruthenate Ca3Ru2O7 through inelastic neutron scattering measurements. The material behaves as a quasi-two-dimensional ferromagnetic bilayer system with very weak interbilayer antiferromagnetic coupling, and its magnetic dispersion can be well described with a nearest-neighbor Heisenberg model. We find that the intrabilayer exchange interaction along the out-of-plane c-axis is much stronger than the in-plane intralayer interaction, in sharp contrast to the previously reported bilayer manganite system. And our study reveals a finite lifetime effect of the magnetic excitation, presumably attributable to the existence of a small number of itinerant charge carriers within the planes.

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