Magnetic excitations in the itinerant antiferromagnet Mn90Cu10

J. A. Fernandez-Baca; M. E. Hagen; R. M. Nicklow; Y. Tsunoda; S. M. Hayden

doi:10.1016/0304-8853(92)90991-V

Magnetic excitations in the itinerant antiferromagnet Mn₉₀Cu₁₀

J. A. Fernandez-Baca, M. E. Hagen, R. M. Nicklow, Y. Tsunoda, S. M. Hayden

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Abstract

We have performed a neutron scattering experiment in order to study the spin dynamics of the itinerant-electron-antiferromagnet Mn₉₀Cu₁₀ at room temperature. Strongly-damped spin waves of energies up to 68 meV have been observed. These excitations have been found to be consistent with a linear dispersion relation with a stiffness constant of about 251 meV Å and an energy gap of 7.5 meV. The spin-wave damping is consistent with theoretical calculations that predict a damping linear in the wavevector q. These results are consistent with recent measurements by Nicklow and Tsunoda, and qualitatively consistent with earlier measurements by Wiltshire and collaborators.

Original language	English
Pages (from-to)	699-700
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	104-107
Issue number	PART 1
DOIs	https://doi.org/10.1016/0304-8853(92)90991-V
State	Published - Feb 2 1992

Funding

The work at ORNL was supportedb y US DOE under contractD E-AC05-84OR2140w0 ith Martin Marietta Energy Systems,I nc. This work has also been partiallys upportedb y NATO grant GRC 900626.

Funders	Funder number
North Atlantic Treaty Organization	GRC 900626

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title = "Magnetic excitations in the itinerant antiferromagnet Mn90Cu10",

abstract = "We have performed a neutron scattering experiment in order to study the spin dynamics of the itinerant-electron-antiferromagnet Mn90Cu10 at room temperature. Strongly-damped spin waves of energies up to 68 meV have been observed. These excitations have been found to be consistent with a linear dispersion relation with a stiffness constant of about 251 meV {\AA} and an energy gap of 7.5 meV. The spin-wave damping is consistent with theoretical calculations that predict a damping linear in the wavevector q. These results are consistent with recent measurements by Nicklow and Tsunoda, and qualitatively consistent with earlier measurements by Wiltshire and collaborators.",

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T1 - Magnetic excitations in the itinerant antiferromagnet Mn90Cu10

AU - Fernandez-Baca, J. A.

AU - Hagen, M. E.

AU - Nicklow, R. M.

AU - Tsunoda, Y.

AU - Hayden, S. M.

PY - 1992/2/2

Y1 - 1992/2/2

N2 - We have performed a neutron scattering experiment in order to study the spin dynamics of the itinerant-electron-antiferromagnet Mn90Cu10 at room temperature. Strongly-damped spin waves of energies up to 68 meV have been observed. These excitations have been found to be consistent with a linear dispersion relation with a stiffness constant of about 251 meV Å and an energy gap of 7.5 meV. The spin-wave damping is consistent with theoretical calculations that predict a damping linear in the wavevector q. These results are consistent with recent measurements by Nicklow and Tsunoda, and qualitatively consistent with earlier measurements by Wiltshire and collaborators.

AB - We have performed a neutron scattering experiment in order to study the spin dynamics of the itinerant-electron-antiferromagnet Mn90Cu10 at room temperature. Strongly-damped spin waves of energies up to 68 meV have been observed. These excitations have been found to be consistent with a linear dispersion relation with a stiffness constant of about 251 meV Å and an energy gap of 7.5 meV. The spin-wave damping is consistent with theoretical calculations that predict a damping linear in the wavevector q. These results are consistent with recent measurements by Nicklow and Tsunoda, and qualitatively consistent with earlier measurements by Wiltshire and collaborators.

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - PART 1

ER -

Magnetic excitations in the itinerant antiferromagnet Mn₉₀Cu₁₀

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