Anisotropy of the Neutron Scattering in the Paramagnetic Phase and on the Spin Waves in the Mn_{0.71}Ni_{0.29} Alloy

• Authors: J. Jankowska-Kisielińska , I. Fijał-Kirejczyk , K. Mikke
• Languages of publication: EN

Abstracts

EN

We have confirmed the significant anisotropy of the generalised magnetic susceptibility in the paramagnetic and antiferromagnetic phase of the fcc Mn-Ni alloys. In this paper the detailed account of the experiments performed on the Mn_{0.71}Ni_{0.29} alloy is given. Our main result for the paramagnetic phase is that the correlation length is larger for the direction parallel to the anisotropy axis than for the perpendicular one by a factor of 1.6. The spin-wave velocity observed at 15 K is higher for the direction parallel to the anisotropy axis than that for the perpendicular direction by a factor of 1.2. These results are similar to that for the Mn_{0.62}Ni_{0.38} alloy. Our results indicate that the magnetic carriers are more localized and the magnetic interactions are less extended in alloys with higher Ni concentration.

Keywords

EN

61.05.fm; 78.70.Nx; 75.30.Ds; 75.40.-s; 75.40.Gb

Discipline

• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 78.70.Nx: Neutron inelastic scattering
• 75.40.Gb: Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.)
• 61.05.fm: Neutron diffraction
• 75.40.-s: Critical-point effects, specific heats, short-range order(for equilibrium properties near critical points, see 64.60.F-; for dynamical critical phenomena, see 64.60.Ht)

• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 1
• Pages: 203-205

Dates

published

2009-01

Contributors

author

J. Jankowska-Kisielińska

• Institute of Atomic Energy, 05-400 Otwock-Świerk, Poland

author

I. Fijał-Kirejczyk

• Institute of Atomic Energy, 05-400 Otwock-Świerk, Poland

author

K. Mikke

• Institute of Atomic Energy, 05-400 Otwock-Świerk, Poland

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Identifiers

DOI

10.12693/APhysPolA.115.203