Fe + ion irradiation induced changes in structural and magnetic properties of iron films | Zendy

K. Papamihail | Zendy; K. Mergia | Zendy; F. Ott | Zendy; Y. Serruys | Zendy; Th. Speliotis | Zendy; Γ. Αποστολόπουλος | Zendy; S. Messoloras | Zendy

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Fe + ion irradiation induced changes in structural and magnetic properties of iron films

Author(s) -

K. Papamihail,

K. Mergia,

F. Ott,

Y. Serruys,

Th. Speliotis,

Γ. Αποστολόπουλος,

S. Messoloras

Publication year - 2016

Publication title -

nuclear materials and energy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.324

H-Index - 25

ISSN - 2352-1791

DOI - 10.1016/j.nme.2016.03.006

Subject(s) - irradiation , magnetic moment , materials science , ion , lattice constant , atom (system on chip) , grain size , condensed matter physics , chemistry , composite material , optics , nuclear physics , physics , organic chemistry , computer science , diffraction , embedded system

490keV Fe+ ion irradiation of 200nm thick Fe films was found to induce both structural and magnetic changes. Both, the lattice constant and the grain size increase as a function of dose and both properties follow the same power law. Irradiation induces a depth dependent magnetic profile consisting of two sublayers. The top Fe sublayer has a magnetic moment higher than that of the Fe before the irradiation whereas the bottom sublayer lower. The two sublayers are connected with the effects of Fe+ irradiation, i.e. the top sublayer with the depth in which mainly radiation damage occurs whereas the bottom one with the implantation of impinging Fe+ ions. The magnetic moments of the two sublayers have a non-monotonous variation with irradiation dose depicting a maximum for the top sublayer and a minimum for the bottom one at 96.2 dpa (‘displacements per atom’). The magnetic moment enhancement/reduction is discussed in relation with the atomic volume variation in the case of atom displacements and/or implantation effects

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