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Evidence of an ion-beam induced crystalline-to-crystalline phase transformation in hafnia

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Abstract.

Samples of monoclinic hafnia were irradiated with increasing fluences of 800 and 300 MeV Kr ions giving rise to a slowing down essentially caused by high electronic excitations. Their structural evolution was monitored in situ by the X-ray diffraction technique. The results indicate, for the first time to our knowledge, the occurrence in monoclinic hafnia of an ion-beam induced crystalline-to-crystalline phase transition. The new formed phase is very likely tetragonal and appears with an effective threshold in the deposited electronic energy loss which is around 20 keV nm-1. In addition, the evolution of the amount of the produced phase with the ion fluence exhibits a sigmoidal shape suggesting a mechanism for phase transformation which needs two ion impacts. Some features of this phase transition are compared with those obtained in the case of zirconia, a well-known isomorphic material with hafnia.

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Authors and Affiliations

  1. Centre Interdisciplinaire de Recherche Ions Lasers (CIRIL), CEA-CNRS-ISMRA, BP 5133, 14070, Caen Cedex 5, France

    A. Benyagoub

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  1. A. Benyagoub
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Correspondence to A. Benyagoub.

Additional information

Received: 6 June 2003, Published online: 9 September 2003

PACS:

61.80.Jh Ion radiation effects - 61.82.Ms Insulators - 64.70.Kb Solid-solid transitions

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Benyagoub, A. Evidence of an ion-beam induced crystalline-to-crystalline phase transformation in hafnia. Eur. Phys. J. B 34, 395–398 (2003). https://doi.org/10.1140/epjb/e2003-00236-x

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  • DOI: https://doi.org/10.1140/epjb/e2003-00236-x

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