We show that Ar+ irradiation can be used effectively to transform a chemically ordered FePt L10 homogeneous thin film into an anisotropy-graded composite media with tunable magnetic response. This can be exploited to produce magnetic media with high thermal stability and moderate coercivity with potential in high-density magnetic recording applications. The depth distribution of the chemical order parameter, which controls the magnetic switching mechanism of the system, has been determined by high-resolution transmission electron microscopy. The irradiation-induced modifications of the material have been modeled using Monte Carlo simulations for ion transport in solids. The magnetic properties and coupling regimes of the resulting exchange-coupled systems are discussed.
Anisotropy-graded magnetic media obtained by ion irradiation of L10 FePt / A., di Bona; P., Luches; F., Albertini; F., Casoli; P., Lupo; L., Nasi; D'Addato, Sergio; G. C., Gazzadi; Valeri, Sergio. - In: ACTA MATERIALIA. - ISSN 1359-6454. - STAMPA. - 61:13(2013), pp. 4840-4847. [10.1016/j.actamat.2013.04.064]
Anisotropy-graded magnetic media obtained by ion irradiation of L10 FePt
D'ADDATO, Sergio;VALERI, Sergio
2013
Abstract
We show that Ar+ irradiation can be used effectively to transform a chemically ordered FePt L10 homogeneous thin film into an anisotropy-graded composite media with tunable magnetic response. This can be exploited to produce magnetic media with high thermal stability and moderate coercivity with potential in high-density magnetic recording applications. The depth distribution of the chemical order parameter, which controls the magnetic switching mechanism of the system, has been determined by high-resolution transmission electron microscopy. The irradiation-induced modifications of the material have been modeled using Monte Carlo simulations for ion transport in solids. The magnetic properties and coupling regimes of the resulting exchange-coupled systems are discussed.
| File | Dimensione | Formato | |
|---|---|---|---|
|
FePtActMat.pdf
Accesso riservato
Tipologia:
Versione pubblicata dall'editore
Dimensione
1.52 MB
Formato
Adobe PDF
|
1.52 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
