Arrays of Metal Nanostructures Produced by Focussed Ion Beam

• Authors: P. Luches , A. di Bona , S. Contri , G. Gazzadi , P. Vavassori , F. Albertini , F. Casoli , L. Nasi , S. Fabbrici , S. Valeri
• Languages of publication: EN

Abstracts

EN

We present a study of the magnetic properties of arrays of nanostructures produced in a focussed ion beam-scanning electron microscope dual beam system. The single magnetic units have been isolated either by direct removal of parts of the metallic film or by local modification of the film magnetic properties. The final quality of the shape and the residual damage strictly depend on beam parameters (spot size and pixel dwell time) and on the swelling properties of the patterned materials. On square Fe(001) elements with a well-defined intrinsic (magnetocristalline) and shape- and size- Łinebreak -induced (shape plus configurational) anisotropy we show that the overall magnetic anisotropy is not a mere superposition of the individual contributions. We also demonstrate that with ion irradiation doses below the milling threshold L1_0 FePt films with perpendicular magnetic anisotropy undergo a transition from the magnetically hard L1_0 phase to the magnetically soft A1 phase leading to an out-of-plane to in-plane spin reorientation. The magnetic properties of the planar arrays obtained by local modification of the film are compared to arrays of sculpted structures of the same material.

Keywords

EN

75.30.Gw; 75.50.Bb; 75.75.+a; 78.20.Ls; 68.49.Sf

Discipline

• 75.30.Gw: Magnetic anisotropy
• 78.20.Ls: Magneto-optical effects(for magneto-optical devices, see 85.70.Sq)
• 75.50.Bb: Fe and its alloys
• 68.49.Sf: Ion scattering from surfaces (charge transfer, sputtering, SIMS)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2007
• Volume: 112
• Issue: 6
• Pages: 1297-1312

Dates

published

2007-12

received

2007-07-04

Contributors

author

P. Luches

• INFM-CNR National Research Center S3, Via Campi 213a, 41100 Modena, Italy

author

A. di Bona

• INFM-CNR National Research Center S3, Via Campi 213a, 41100 Modena, Italy

author

S. Contri

• INFM-CNR National Research Center S3, Via Campi 213a, 41100 Modena, Italy
• Dept. of Physics, University of Modena and Reggio Emilia, Via Campi 213a, 41100 Modena, Italy

author

G. Gazzadi

• INFM-CNR National Research Center S3, Via Campi 213a, 41100 Modena, Italy

author

P. Vavassori

• Dept. of Physics, University of Ferrara, Via Saragat 1, 44100 Ferrara, Italy

author

F. Albertini

• IMEM-CNR, Parco Area delle Scienze 37/A, 43010 Parma, Italy

author

F. Casoli

• IMEM-CNR, Parco Area delle Scienze 37/A, 43010 Parma, Italy

author

L. Nasi

• IMEM-CNR, Parco Area delle Scienze 37/A, 43010 Parma, Italy

author

S. Fabbrici

• IMEM-CNR, Parco Area delle Scienze 37/A, 43010 Parma, Italy

author

S. Valeri

• INFM-CNR National Research Center S3, Via Campi 213a, 41100 Modena, Italy
• Dept. of Physics, University of Modena and Reggio Emilia, Via Campi 213a, 41100 Modena, Italy

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Identifiers

DOI

10.12693/APhysPolA.112.1297