Spin waves in an Invar alloy (Fe0.65Ni0.35) |
| |
Authors: | M Kohgi Y Ishikawa N Wakabayashi |
| |
Institution: | Physics Department, Tohoku University, Sendai, Japan;Solid State Division, Oak Ridge National Laboratory, Oak Ridge, TN, U.S.A. |
| |
Abstract: | The spin wave dispersion relation in an Invar alloy Fe0.65Ni0.35 has been measured at 4.2 K in the 111] direction by neutron inelastic scattering.Well defined magnon groups have been observed up to an energy transfer of about 80 meV. The spin wave dispersion is well described by ?ω=Dq2(1?βq2) with and . The value of D is in accord with the value extrapolated from other neutron scattering results at higher contents of Ni and disagrees with spin wave resonance results.No trace of γ-iron type antiferromagnetic order could be detected at 4.2 K in this alloy by elastic neutron scattering measurements. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|