In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 52, No. 7S ( 2013-07-01), p. 07HB05-
Abstract:
A picosecond ultrasound system for measuring the elastic stiffness of thin films at high temperatures is developed, and the elastic stiffness of Co films is measured up to 771 K during heating and cooling processes. The elastic stiffness of an as-deposited film is smaller than that of bulk Co. However, during heating, stiffening due to crystallization is observed, and in the cooling process, the elastic stiffness follows the temperature dependence of bulk Co. These results indicate that the as-deposited film is softer than the bulk and that once stiffening has occurred upon annealing, the Co thin film shows a similar elastic property to the bulk. The temperature dependence of acoustic attenuation is also discussed.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.7567/JJAP.52.07HB05
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2013
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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