Ausanio, Giovanni and Iannotti, Vincenzo and Amoruso, Salvatore and Lanotte, Luciano (2006) Morphology structure and magnetic properties of (Tb0.3Dy0.7Fe2)(100-x)Fe-x nanogranular films produced by ultrashort pulsed laser deposition. [Pubblicazione in rivista scientifica]

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Item Type: Pubblicazione in rivista scientifica
Date Deposited: 20 Oct 2010 08:00
Last Modified: 30 Apr 2014 19:42
URI: http://www.fedoa.unina.it/id/eprint/6400

Abstract

Magnetic films were produced by ultrashort pulsed laser deposition (uPLD) using a rotating multitarget of terfenol-D (nominal composition: Tb0.3Dy0.7Fe2) and iron. The composite films obtained have a nanoparticle morphology typical of material produced by the uPLD technique, where each particle retains the stoichiometry of the parent target material. The co-deposition allows the production of (Tb0.3Dy0.7Fe2)100−x Fex films, where x can range from 0% to 100%. Unlike films obtained by standard nanosecond PLD, pure terfenol-D layers (x = 0) are amorphous, while the addition of iron induces the formation of Fe crystalline nanoparticles inside an amorphous nanogranular matrix of terfenol-D. The magnetic properties depend on the nanoparticle morphology and more strictly on the fraction of iron particles. In particular, it was demonstrated that the exchange interaction between hard magnetic terfenol-D nanoparticles and iron nanoparticles is active in the uPLD films, giving a cumulative magnetic response resulting from an averaging of the properties of the two component phases.

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