ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The study of the magnetoelastic waves as a function of temperature appears as a useful method to be able to investigate both the magnetization critical point (particularly in amorphous metals) and structural relaxation effects. Our experimental apparatus1,2 used to produce and pick up standing magnetoelastic waves in ferromagnetic samples was modified by building an anti-inductive furnace and a water cooling system. This allows us to perform measurements "on line'' on the wave amplitude A versus temperature in the range ∼30–400 °C. By slowly increasing the temperature, one observes that the amplitude A falls to zero when the Curie point Tc is reached. Only if the samples were properly preannealed, during subsequent heating or cooling, the same A values were measured at any fixed temperature. When the annealing is unaccomplished, the thermal cycles revealed in the "as-produced'' samples can be correlated with the structural relaxation. In 2826 Metglas, magnetic anisotropy abatement, large increase of the wave amplitude, and sensitive increment to Tc agree with each other and represent, in this study, the most important consequence of the structural relaxation.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.342359
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