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-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.

Arrays of metal nanostructures produced by focussed ion beam / P., Luches; A., di Bona; Contri, Sara Federica; G. C., Gazzadi; P., Vavassori; F., Albertini; F., Casoli; L., Nasi; S., Fabbrici; Valeri, Sergio. - In: ACTA PHYSICA POLONICA A. - ISSN 0587-4246. - STAMPA. - 112:6(2007), pp. 1297-1312. [10.12693/APhysPolA.112.1297]

Arrays of metal nanostructures produced by focussed ion beam

CONTRI, Sara Federica;VALERI, Sergio
2007

Abstract

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-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.
2007
112
6
1297
1312
Arrays of metal nanostructures produced by focussed ion beam / P., Luches; A., di Bona; Contri, Sara Federica; G. C., Gazzadi; P., Vavassori; F., Albertini; F., Casoli; L., Nasi; S., Fabbrici; Valeri, Sergio. - In: ACTA PHYSICA POLONICA A. - ISSN 0587-4246. - STAMPA. - 112:6(2007), pp. 1297-1312. [10.12693/APhysPolA.112.1297]
P., Luches; A., di Bona; Contri, Sara Federica; G. C., Gazzadi; P., Vavassori; F., Albertini; F., Casoli; L., Nasi; S., Fabbrici; Valeri, Sergio...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/597374
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