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Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities
The fine control of the exchange coupling strength and blocking temperature ofexchange bias systems is an important requirement for the development of magnetoresistive sensors with two pinned electrodes. In this paper, we successfully tune these parameters in top- and bottom-pinned systems, comprisi...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970079/ https://www.ncbi.nlm.nih.gov/pubmed/27384565 http://dx.doi.org/10.3390/s16071030 |
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author | Sharma, Parikshit Pratim Albisetti, Edoardo Monticelli, Marco Bertacco, Riccardo Petti, Daniela |
author_facet | Sharma, Parikshit Pratim Albisetti, Edoardo Monticelli, Marco Bertacco, Riccardo Petti, Daniela |
author_sort | Sharma, Parikshit Pratim |
collection | PubMed |
description | The fine control of the exchange coupling strength and blocking temperature ofexchange bias systems is an important requirement for the development of magnetoresistive sensors with two pinned electrodes. In this paper, we successfully tune these parameters in top- and bottom-pinned systems, comprising 5 nm thick Co(40)Fe(40)B(20) and 6.5 nm thick Ir(22)Mn(78) films. By inserting Ru impurities at different concentrations in the Ir(22)Mn(78) layer, blocking temperatures ranging from 220 °C to 100 °C and exchange bias fields from 200 Oe to 60 Oe are obtained. This method is then applied to the fabrication of sensors based on magnetic tunneling junctions consisting of a pinned synthetic antiferromagnet reference layer and a top-pinned sensing layer. This work paves the way towards the development of new sensors with finely tuned magnetic anisotropies. |
format | Online Article Text |
id | pubmed-4970079 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-49700792016-08-04 Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities Sharma, Parikshit Pratim Albisetti, Edoardo Monticelli, Marco Bertacco, Riccardo Petti, Daniela Sensors (Basel) Article The fine control of the exchange coupling strength and blocking temperature ofexchange bias systems is an important requirement for the development of magnetoresistive sensors with two pinned electrodes. In this paper, we successfully tune these parameters in top- and bottom-pinned systems, comprising 5 nm thick Co(40)Fe(40)B(20) and 6.5 nm thick Ir(22)Mn(78) films. By inserting Ru impurities at different concentrations in the Ir(22)Mn(78) layer, blocking temperatures ranging from 220 °C to 100 °C and exchange bias fields from 200 Oe to 60 Oe are obtained. This method is then applied to the fabrication of sensors based on magnetic tunneling junctions consisting of a pinned synthetic antiferromagnet reference layer and a top-pinned sensing layer. This work paves the way towards the development of new sensors with finely tuned magnetic anisotropies. MDPI 2016-07-04 /pmc/articles/PMC4970079/ /pubmed/27384565 http://dx.doi.org/10.3390/s16071030 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Sharma, Parikshit Pratim Albisetti, Edoardo Monticelli, Marco Bertacco, Riccardo Petti, Daniela Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities |
title | Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities |
title_full | Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities |
title_fullStr | Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities |
title_full_unstemmed | Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities |
title_short | Exchange Bias Tuning for Magnetoresistive Sensors by Inclusion of Non-Magnetic Impurities |
title_sort | exchange bias tuning for magnetoresistive sensors by inclusion of non-magnetic impurities |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970079/ https://www.ncbi.nlm.nih.gov/pubmed/27384565 http://dx.doi.org/10.3390/s16071030 |
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