Low-temperature spin waves in amorphous Fe90-xNi xZr10

J. A. Fernandez-Baca; J. W. Lynn; J. J. Rhyne; G. E. Fish

doi:10.1063/1.340655

Low-temperature spin waves in amorphous Fe_90-xNi _xZr₁₀

J. A. Fernandez-Baca, J. W. Lynn, J. J. Rhyne, G. E. Fish

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Abstract

Inelastic neutron scattering measurements have been performed on rapid-quenched ribbons of Fe_90-xNi_xZr₁ ₀ (x=1,5,10) to measure the small wave-vector spin-wave spectrum. At all three concentrations a quadratic dispersion relation typical of an isotropic ferromagnet is observed, but with anomalous properties at low temperatures. For x=5 and 10 the excitations are found to broaden considerably for temperatures ≤0.3 T_c. For x=1 the spin waves not only broaden for T≤0.5T_c, but the spin-wave energies decrease monotonically with decreasing temperature while a resolution-limited quasielastic component of the scattering develops. These results are consistent with a picture of competing ferromagnetic and antiferromagnetic interactions, with reentrant spin-glass behavior evident if the frustration is sufficiently strong.

Original language	English
Pages (from-to)	3749-3751
Number of pages	3
Journal	Journal of Applied Physics
Volume	63
Issue number	8
DOIs	https://doi.org/10.1063/1.340655
State	Published - 1988

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title = "Low-temperature spin waves in amorphous Fe90-xNi xZr10",

abstract = "Inelastic neutron scattering measurements have been performed on rapid-quenched ribbons of Fe90-xNixZr1 0 (x=1,5,10) to measure the small wave-vector spin-wave spectrum. At all three concentrations a quadratic dispersion relation typical of an isotropic ferromagnet is observed, but with anomalous properties at low temperatures. For x=5 and 10 the excitations are found to broaden considerably for temperatures ≤0.3 Tc. For x=1 the spin waves not only broaden for T≤0.5Tc, but the spin-wave energies decrease monotonically with decreasing temperature while a resolution-limited quasielastic component of the scattering develops. These results are consistent with a picture of competing ferromagnetic and antiferromagnetic interactions, with reentrant spin-glass behavior evident if the frustration is sufficiently strong.",

author = "Fernandez-Baca, {J. A.} and Lynn, {J. W.} and Rhyne, {J. J.} and Fish, {G. E.}",

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T1 - Low-temperature spin waves in amorphous Fe90-xNi xZr10

AU - Fernandez-Baca, J. A.

AU - Lynn, J. W.

AU - Rhyne, J. J.

AU - Fish, G. E.

PY - 1988

Y1 - 1988

N2 - Inelastic neutron scattering measurements have been performed on rapid-quenched ribbons of Fe90-xNixZr1 0 (x=1,5,10) to measure the small wave-vector spin-wave spectrum. At all three concentrations a quadratic dispersion relation typical of an isotropic ferromagnet is observed, but with anomalous properties at low temperatures. For x=5 and 10 the excitations are found to broaden considerably for temperatures ≤0.3 Tc. For x=1 the spin waves not only broaden for T≤0.5Tc, but the spin-wave energies decrease monotonically with decreasing temperature while a resolution-limited quasielastic component of the scattering develops. These results are consistent with a picture of competing ferromagnetic and antiferromagnetic interactions, with reentrant spin-glass behavior evident if the frustration is sufficiently strong.

AB - Inelastic neutron scattering measurements have been performed on rapid-quenched ribbons of Fe90-xNixZr1 0 (x=1,5,10) to measure the small wave-vector spin-wave spectrum. At all three concentrations a quadratic dispersion relation typical of an isotropic ferromagnet is observed, but with anomalous properties at low temperatures. For x=5 and 10 the excitations are found to broaden considerably for temperatures ≤0.3 Tc. For x=1 the spin waves not only broaden for T≤0.5Tc, but the spin-wave energies decrease monotonically with decreasing temperature while a resolution-limited quasielastic component of the scattering develops. These results are consistent with a picture of competing ferromagnetic and antiferromagnetic interactions, with reentrant spin-glass behavior evident if the frustration is sufficiently strong.

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

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Low-temperature spin waves in amorphous Fe_90-xNi _xZr₁₀

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