http://www.cnr.it/ontology/cnr/individuo/prodotto/ID168281

Morphology evolution and magnetic properties improvement in FePt epitaxial films by in situ annealing after growth (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Morphology evolution and magnetic properties improvement in FePt epitaxial films by in situ annealing after growth (Articolo in rivista) (literal)

Anno

2008-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1063/1.2885339 (literal)

Alternative label

Casoli F. a; Nasi L. a; Albertini F. a; Fabbrici S. a; Bocchi C. a; Germini F. a; Luches P. b; Rota A. b; Valeri S. bc (2008)
Morphology evolution and magnetic properties improvement in FePt epitaxial films by in situ annealing after growth
in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Casoli F. a; Nasi L. a; Albertini F. a; Fabbrici S. a; Bocchi C. a; Germini F. a; Luches P. b; Rota A. b; Valeri S. bc (literal)

Pagina inizio

043912-1 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

http://jap.aip.org/resource/1/japiau/v103/i4/p043912_s1 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

103 (literal)

Rivista

Journal of applied physics (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note

In: Journal of Applied Physics, vol. 103 article n. 043912. American Institute of Physics, 2008. (literal)

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8 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

4 (literal)

Note

ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

a CNR, IMEM, I-43100 Parma, Italy; b CNR, INFM, Natl Res Ctr Nanostruct & Biosyst Surfaces S3, I-41100 Modena, Italy; c Univ Modena, Dipartimento Fis, I-41100 Modena, Italy (literal)

Titolo

Morphology evolution and magnetic properties improvement in FePt epitaxial films by in situ annealing after growth (literal)

Abstract

This paper presents a detailed study of structure, morphology, and magnetic properties in FePt thin films epitaxially grown on MgO(100) at intermediate temperatures (380 °C). It focuses on the effects obtained by in situ annealing the FePt films after deposition. We have demonstrated that the annealing allows one to complete the ordering, thus obtaining an epitaxial L1(0)-FePt film with large perpendicular anisotropy (up to 3 X 10(7) erg/cm(3)) and high perpendicular squareness and remanence ratio (both higher than 0.85). At the same time, we have found a peculiar morphology evolution by increasing the annealing time: the interconnected mazelike grains evolve towards interconnected dotlike grains of reduced size (down to 10 nm). Due to the interconnection at the grains basis, the increase in the film perpendicular coercivity with the annealing process is moderate (up to 4.1 kOe), leading to an increasing anisotropy/coercivity ratio with the annealing time. As a further step towards the understanding of the properties evolution with annealing, we have investigated the magnetic domain pattern and analyzed the domain-period dependence on the anisotropy constant in comparison with the behavior expected by the Kooy-Enz theory [C. Kooy and U. Enz, Philips Res. Rep. 15, 7 (1960)]. The main magnetic properties and reduced grain size obtained after the in situ annealing are promising to realize perpendicular recording media with reduced bit size, high thermal stability, and suitable switching field. (C) 2008 American Institute of Physics. (literal)

Editore