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Logarithmic Relaxation of Resistance in Time of Annealed and Plastically Deformed Au80Fe20

Published online by Cambridge University Press:  14 March 2011

P. Allia ,
M. Baricco ,
E. Bosco ,
M. Coisson ,
D. Falletti ,
V. Selvaggini ,
P. Tiberto  and
F. Vinai
P. Allia
Affiliation:
DIFIS-DISPEA, Politecnico di Torino and INFM, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
M. Baricco
Affiliation:
IFM, Università di Torino and INFM, Via Pietro Giuria 7, I-10125 Torino, Italy
E. Bosco
Affiliation:
IFM, Università di Torino and INFM, Via Pietro Giuria 7, I-10125 Torino, Italy
M. Coisson
Affiliation:
DIFIS-DISPEA, Politecnico di Torino and INFM, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
D. Falletti
Affiliation:
IFM, Università di Torino and INFM, Via Pietro Giuria 7, I-10125 Torino, Italy
V. Selvaggini
Affiliation:
DIFIS-DISPEA, Politecnico di Torino and INFM, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
P. Tiberto
Affiliation:
IEN Galileo Ferraris and INFM, Corso M. d'Azeglio 42, I-10125 Torino, Italy
F. Vinai
Affiliation:
IEN Galileo Ferraris and INFM, Corso M. d'Azeglio 42, I-10125 Torino, Italy
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Abstract

Rapidly solidified Au80Fe20 ribbons were prepared either by melt spinning or by solidstate quenching of a homogenised master alloy. The as-quenched sample displays a paramagnetic behavior indicating a perfect solid solution of Fe in the Au matrix. Subsequent anneals have been performed to induce the precipitation of Fe particles. X-ray diffraction technique have been exploited to determine the alloy microstructure. The structural stability have been studied by measuring electrical properties in isothermal and tempering condition. The variation of magnetisation and electrical resistance have been measured after submitting the samples to plastic deformation. A logarithmic relaxation of the electrical resistance is observed in all studied samples after deformation. Magnetic hysteresis loops have been measured in as-quenched and annealed samples at different temperatures. X-ray diffraction and magnetic measurements indicate that thermal treatments have been successful in inducing the precipitation of both bcc and fcc Fe clusters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 634: Symposium B – Structure and Mechanical Properties of Nanophase Materials-Theory & Computer Simulations vs. Experiment , 2000 , B3.10.1
Copyright
Copyright © Materials Research Society 2001

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References

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