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Inelastic neutron scattering study of Pr2Co12Fe5 (Articolo in rivista)

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Inelastic neutron scattering study of Pr2Co12Fe5 (Articolo in rivista) (literal)

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Magnani N.; Paoluzi A.; Pareti L.; Stride J. A. (2008)
Inelastic neutron scattering study of Pr2Co12Fe5
in Journal of physics. Condensed matter (Print); IOP PUBLISHING LTD, BRISTOL BS1 6BE (Regno Unito)
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Commission European Communities, Joint Research Center, Inst. Transuranium Elements Karlsruhe, Germany, CNR-IMEM, Parma, Univ. New Wales, School of Chemistry, Sydney, Australia (literal)

Titolo

Abstract

Inelastic neutron scattering measurements have been performed on the intermetallic compounds Pr2Co12Fe5 (and Y2Co12Fe5) on the IN4 time-of-flight spectrometer at the Institut Laue-Langevin, Grenoble. The data on the yttrium-based compound have been used to estimate the phonon scattering. A broad peak is detected at 18 meV, whose deduced Q dependence (when only the magnetic contribution is considered) is consistent with the form factor of Pr3+ ions; in the high-Q region, the same peak displays a clear phononic character. The experimental results are analysed by a molecular field model including exchange and crystal-field contributions, and the derived value for the exchange parameter is consistent with the trend inferred by studying Pr2Co17 and Pr2Fe17. A possible mechanism for the generation of the large volume magnetostriction, to be checked by further experiments, is suggested. (literal)

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