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The Effect of Swift Heavy Ion Irradiation on Quasicrystals

Published online by Cambridge University Press:  17 March 2011

Ratnamala Chatterjee ,
Aloke Kanjilal  and
A. Dunlop
Ratnamala Chatterjee
Affiliation:
Department of Physics, Indian Institute of Technology, New Delhi, India
Aloke Kanjilal
Affiliation:
Department of Physics, Indian Institute of Technology, New Delhi, India
A. Dunlop
Affiliation:
Laboratoire des Solides Irradies, Ecole Polytechnique, Palaiseau, France
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Abstract

The effect of pure electronic excitations (by ∼ 835 MeV Kr irradiation) on a stable icosahedral quasicrystal is compared with the effect of electronic excitations combined with the nuclear collisions (by 100 MeV Ni irradiation) occurring in a similar quasicrystal. The critical stopping power was kept at 1300 eV/Å for both the experiments. Under the pure electronic excitations, the R(φ)/R(0) [ratio of resistance at fluence φ and the resistance on the same piece with zero fluence) of quasicrystal goes through oscillatory changes, until at ∼ 1 × 1012 ions/cm2where this ratio drops considerably. The ex-situ XRD on the irradiated sample does show the evidence of degradation of the structure. In contrast, the Ni- irradiated sample shows an increase in resistivity after a critical fluence of 2.5 × 1013 ions/cm2, which remains constant for higher fluences. Corresponding defect annihilation effects are observed in the XRD of Ni- irradiated samples.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 643: Symposium K – Quasicrystals-Preparation, Properties, and Applications , 2000 , K6.3
Copyright
Copyright © Materials Research Society 2001

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