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Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order

We present a comprehensive study on the magnetization reversal in the Fe/NiFe bilayer system by alternating the order of the magnetic layers. All the samples show growth-induced uniaxial magnetic anisotropy due to the oblique angle deposition technique. Strong interfacial exchange coupling between t...

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Autores principales: Nayak, Sagarika, Das, Sudhansu Sekhar, Singh, Braj Bhusan, Charlton, Timothy R., Kinane, Christy J., Bedanta, Subhankar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056852/
https://www.ncbi.nlm.nih.gov/pubmed/35519045
http://dx.doi.org/10.1039/d0ra05429a
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author Nayak, Sagarika
Das, Sudhansu Sekhar
Singh, Braj Bhusan
Charlton, Timothy R.
Kinane, Christy J.
Bedanta, Subhankar
author_facet Nayak, Sagarika
Das, Sudhansu Sekhar
Singh, Braj Bhusan
Charlton, Timothy R.
Kinane, Christy J.
Bedanta, Subhankar
author_sort Nayak, Sagarika
collection PubMed
description We present a comprehensive study on the magnetization reversal in the Fe/NiFe bilayer system by alternating the order of the magnetic layers. All the samples show growth-induced uniaxial magnetic anisotropy due to the oblique angle deposition technique. Strong interfacial exchange coupling between the Fe and NiFe layers leads to single-phase hysteresis loops in the bilayer system. The strength of coupling being dependent on the interface changes upon alternating the order of magnetic layers. The magnetic parameters such as coercivity H(C), and anisotropy field H(K) become almost doubled when a NiFe layer is grown over the Fe layers. This enhancement in the magnetic parameters is primarily dependent on the increase of the thickness and magnetic moment of the Fe–NiFe interfacial layer as revealed from the polarized neutron reflectivity (PNR) data of the bilayer samples. The difference in the thickness and magnetization of the Fe–NiFe interfacial layer indicates the modification of the microstructure by alternating the order of the magnetic layers of the bilayers. The interfacial magnetic moment increased by almost 18% when the NiFe layer was grown over the Fe layer. In spite of the different values of anisotropy fields and modified interfacial exchange coupling, the Gilbert damping constant values of the ferromagnetic bilayers remain similar to the single NiFe layer.
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spelling pubmed-90568522022-05-04 Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order Nayak, Sagarika Das, Sudhansu Sekhar Singh, Braj Bhusan Charlton, Timothy R. Kinane, Christy J. Bedanta, Subhankar RSC Adv Chemistry We present a comprehensive study on the magnetization reversal in the Fe/NiFe bilayer system by alternating the order of the magnetic layers. All the samples show growth-induced uniaxial magnetic anisotropy due to the oblique angle deposition technique. Strong interfacial exchange coupling between the Fe and NiFe layers leads to single-phase hysteresis loops in the bilayer system. The strength of coupling being dependent on the interface changes upon alternating the order of magnetic layers. The magnetic parameters such as coercivity H(C), and anisotropy field H(K) become almost doubled when a NiFe layer is grown over the Fe layers. This enhancement in the magnetic parameters is primarily dependent on the increase of the thickness and magnetic moment of the Fe–NiFe interfacial layer as revealed from the polarized neutron reflectivity (PNR) data of the bilayer samples. The difference in the thickness and magnetization of the Fe–NiFe interfacial layer indicates the modification of the microstructure by alternating the order of the magnetic layers of the bilayers. The interfacial magnetic moment increased by almost 18% when the NiFe layer was grown over the Fe layer. In spite of the different values of anisotropy fields and modified interfacial exchange coupling, the Gilbert damping constant values of the ferromagnetic bilayers remain similar to the single NiFe layer. The Royal Society of Chemistry 2020-09-15 /pmc/articles/PMC9056852/ /pubmed/35519045 http://dx.doi.org/10.1039/d0ra05429a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Nayak, Sagarika
Das, Sudhansu Sekhar
Singh, Braj Bhusan
Charlton, Timothy R.
Kinane, Christy J.
Bedanta, Subhankar
Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
title Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
title_full Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
title_fullStr Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
title_full_unstemmed Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
title_short Study of the magnetic interface and its effect in Fe/NiFe bilayers of alternating order
title_sort study of the magnetic interface and its effect in fe/nife bilayers of alternating order
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9056852/
https://www.ncbi.nlm.nih.gov/pubmed/35519045
http://dx.doi.org/10.1039/d0ra05429a
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