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Thermomechanical Behaviour of AgNi Multilayers and Magnetoelastic Effects

Published online by Cambridge University Press:  15 February 2011

V. Pelosin ,
B. Rodmacq ,
S.R. Teixeira ,
J. Hillairet  and
G. Carlotti
V. Pelosin
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée/SP2M/MP, 85X, 38041 Grenoble Cedex, France.
B. Rodmacq
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée/SP2M/MP, 85X, 38041 Grenoble Cedex, France.
S.R. Teixeira
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée/SP2M/MP, 85X, 38041 Grenoble Cedex, France.
J. Hillairet
Affiliation:
CEA/Département de Recherche Fondamentale sur la Matière Condensée/SP2M/MP, 85X, 38041 Grenoble Cedex, France.
G. Carlotti
Affiliation:
Dipartimento di Fisica, Università degli Studi di Perugia, Via Pascoli, 06100 Perugia, Italy.
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Abstract

The elastic and anelastic properties of AgNi multilayers prepared by sputtering were investigated during the course of anneal cycles. The respective temperature variations of some of the elastic constants and moduli were followed by Brillouin scattering and dynamical methods based on use of a torsion pendulum and a vibrating-reed system. The last two enabled to investigate the internal damping associated with the presence of two-dimensional defects. It appears that the motion of interfaces and grain boundaries is inhibited by the high defect density. In contrast, substantial effects associated with the motion of the magnetic domain walls were evidenced. Concurrently, internal stresses were studied by in situ deflection measurements. Flow stress values on the order of 1 GPa were observed. Dilatometry experiments showed that a large part of the non-recoverable modifications in the state of stress induced by thermal cycling originates in the densification of the material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 308: Symposium M1 – Thin Films: Stresses and Mechanical Properties IV , 1993 , 701
Copyright
Copyright © Materials Research Society 1993

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References

REFERENCES

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