Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism

Current magnetic memories are based on writing and reading out the domains with opposite orientation of the magnetization vector. Alternatively, information can be encoded in regions with a different value of the saturation magnetization. The latter approach can be realized in principle with chemica...

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Autores principales:	Graus Philipp, Möller Thomas B., Leiderer Paul, Boneberg Johannes, Polushkin Nikolay I.
Formato:	article
Lenguaje:	EN
Publicado:	Institue of Optics and Electronics, Chinese Academy of Sciences 2020
Materias:	thin films laser patterning magnetic dots magnetic memory Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/b840ee57a5ee4888a4fd8df91b0f6166
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spelling	oai:doaj.org-article:b840ee57a5ee4888a4fd8df91b0f61662021-11-10T10:13:15ZDirect laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism2096-457910.29026/oea.2020.190027https://doaj.org/article/b840ee57a5ee4888a4fd8df91b0f61662020-01-01T00:00:00Zhttp://www.oejournal.org/article/doi/10.29026/oea.2020.190027https://doaj.org/toc/2096-4579Current magnetic memories are based on writing and reading out the domains with opposite orientation of the magnetization vector. Alternatively, information can be encoded in regions with a different value of the saturation magnetization. The latter approach can be realized in principle with chemical order-disorder transitions in intermetallic alloys. Here, we study such transformations in a thin-film (35 nm) Fe60Al40alloy and demonstrate the formation of periodic magnetic nanostructures (PMNS) on its surface by direct laser interference patterning (DLIP). These PMNS are nonvolatile and detectable by magnetic force microscopy (MFM) at room temperature after DLIP with a single nanosecond pulse. We provide different arguments that the PMNS we observe originate from increasing magnetization in maxima of the interference pattern because of chemical disordering in the atomic lattice of the alloy at temperatures T higher than the critical temperature Tc for the order (B2)-disorder (A2) transition. Theoretically, our simulations of the temporal evolution of a partially ordered state at T > Tc reveal that the disordering rate is significant even below the melting threshold. Experimentally, we find that the PMNS are erasable with standard thermal annealing at T < Tc.Graus PhilippMöller Thomas B.Leiderer PaulBoneberg JohannesPolushkin Nikolay I.Institue of Optics and Electronics, Chinese Academy of Sciencesarticlethin filmslaser patterningmagnetic dotsmagnetic memoryOptics. LightQC350-467ENOpto-Electronic Advances, Vol 3, Iss 1, Pp 190027-1-190027-7 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	thin films laser patterning magnetic dots magnetic memory Optics. Light QC350-467
spellingShingle	thin films laser patterning magnetic dots magnetic memory Optics. Light QC350-467 Graus Philipp Möller Thomas B. Leiderer Paul Boneberg Johannes Polushkin Nikolay I. Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism
description	Current magnetic memories are based on writing and reading out the domains with opposite orientation of the magnetization vector. Alternatively, information can be encoded in regions with a different value of the saturation magnetization. The latter approach can be realized in principle with chemical order-disorder transitions in intermetallic alloys. Here, we study such transformations in a thin-film (35 nm) Fe60Al40alloy and demonstrate the formation of periodic magnetic nanostructures (PMNS) on its surface by direct laser interference patterning (DLIP). These PMNS are nonvolatile and detectable by magnetic force microscopy (MFM) at room temperature after DLIP with a single nanosecond pulse. We provide different arguments that the PMNS we observe originate from increasing magnetization in maxima of the interference pattern because of chemical disordering in the atomic lattice of the alloy at temperatures T higher than the critical temperature Tc for the order (B2)-disorder (A2) transition. Theoretically, our simulations of the temporal evolution of a partially ordered state at T > Tc reveal that the disordering rate is significant even below the melting threshold. Experimentally, we find that the PMNS are erasable with standard thermal annealing at T < Tc.
format	article
author	Graus Philipp Möller Thomas B. Leiderer Paul Boneberg Johannes Polushkin Nikolay I.
author_facet	Graus Philipp Möller Thomas B. Leiderer Paul Boneberg Johannes Polushkin Nikolay I.
author_sort	Graus Philipp
title	Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism
title_short	Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism
title_full	Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism
title_fullStr	Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism
title_full_unstemmed	Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism
title_sort	direct laser interference patterning of nonvolatile magnetic nanostructures in fe60al40 alloy via disorder-induced ferromagnetism
publisher	Institue of Optics and Electronics, Chinese Academy of Sciences
publishDate	2020
url	https://doaj.org/article/b840ee57a5ee4888a4fd8df91b0f6166
work_keys_str_mv	AT grausphilipp directlaserinterferencepatterningofnonvolatilemagneticnanostructuresinfe60al40alloyviadisorderinducedferromagnetism AT mollerthomasb directlaserinterferencepatterningofnonvolatilemagneticnanostructuresinfe60al40alloyviadisorderinducedferromagnetism AT leidererpaul directlaserinterferencepatterningofnonvolatilemagneticnanostructuresinfe60al40alloyviadisorderinducedferromagnetism AT bonebergjohannes directlaserinterferencepatterningofnonvolatilemagneticnanostructuresinfe60al40alloyviadisorderinducedferromagnetism AT polushkinnikolayi directlaserinterferencepatterningofnonvolatilemagneticnanostructuresinfe60al40alloyviadisorderinducedferromagnetism
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Direct laser interference patterning of nonvolatile magnetic nanostructures in Fe60Al40 alloy via disorder-induced ferromagnetism

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