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journal article·2019-03-01Open access

Magnetic properties of permalloy antidot array fabricated by interference lithography

A. S. Silva, A. Hierro-Rodriguez, S. A. Bunyaev, G. N. Kakazei, O. V. Dobrovolskiy, C. Redondo, R. Morales, H. Crespo, D. Navas

AIP Advances· Volume 9· Issue 3
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Source abstract

Abstract

The magnetic properties of a Permalloy antidot array in square lattice geometry, with circular-rhomboidal hole shape and fabricated by interference laser lithography and ion-beam sputtering have been reported. Magneto-optical Kerr effect magnetometry indicated that the sample exhibits four-fold anisotropic behaviour, i.e. different magnetization loops were observed when the external magnetic field was applied along either x- or y-axis, or along the array diagonal. Broadband ferromagnetic resonance measurements revealed a rich variety of different magnetization configurations in the unsaturated state that can be controlled by the orientation of the external magnetic field. Micromagnetic simulations have been performed to explain the observed results. On the contrary, in the saturated regime the system demonstrated almost isotropic magnetic behaviour that improves with external field increase. The obtained results show the potential of interference lithography for the fabrication of large area antidot arrays.
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Research context

OpenAlex topics: Magnetic properties of thin films · Theoretical and Computational Physics · Physics of Superconductivity and Magnetism

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

IFIMUP-IN/Department of Physics and Astronomy, University of Porto 1 , 4169-007 Porto, Portugal

SUPA, School of Physics and Astronomy, University of Glasgow 2 , G12 8QQ Glasgow, UK

Physikalisches Institut, Goethe University 3 , 60438 Frankfurt am Main, Germany

Department of Chemical-Physics, University of the Basque Country UPV/EHU 4 , 48940 Leioa, Spain

Department of Chemical-Physics & BCMaterials, University of the Basque Country UPV/EHU 5 , 48940 Leioa, Spain

IKERBASQUE, Basque Foundation for Science 6 , 48011 Bilbao, Spain

Funding

European Union Horizon 2020 Research and Innovation Programme · Portuguese Foundation of Science and Technology · Portuguese Foundation of Science and technology · Spanish MINECO · European Cooperation in Science and Technology

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