Cargando…
Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure
For the perpendicular-magnetic-tunneling-junction (p-MTJ) spin valve with a nanoscale-thick bottom Co(2)Fe(6)B(2) free layer ex situ annealed at 400 °C, which has been used as a common p-MTJ structure, the Pt atoms of the Pt buffer layer diffused into the MgO tunneling barrier. This transformed the...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2016
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5039147/ https://www.ncbi.nlm.nih.gov/pubmed/27677304 http://dx.doi.org/10.1186/s11671-016-1637-9 |
_version_ | 1782455999429345280 |
---|---|
author | Lee, Du-Yeong Lee, Seung-Eun Shim, Tae-Hun Park, Jea-Gun |
author_facet | Lee, Du-Yeong Lee, Seung-Eun Shim, Tae-Hun Park, Jea-Gun |
author_sort | Lee, Du-Yeong |
collection | PubMed |
description | For the perpendicular-magnetic-tunneling-junction (p-MTJ) spin valve with a nanoscale-thick bottom Co(2)Fe(6)B(2) free layer ex situ annealed at 400 °C, which has been used as a common p-MTJ structure, the Pt atoms of the Pt buffer layer diffused into the MgO tunneling barrier. This transformed the MgO tunneling barrier from a body-centered cubic (b.c.c) crystallized layer into a mixture of b.c.c, face-centered cubic, and amorphous layers and rapidly decreased the tunneling-magnetoresistance (TMR) ratio. The p-MTJ spin valve with a nanoscale-thick top Co(2)Fe(6)B(2) free layer could prevent the Pt atoms diffusing into the MgO tunneling barrier during ex situ annealing at 400 °C because of non-necessity of a Pt buffer layer, demonstrating the TMR ratio of ~143 %. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s11671-016-1637-9) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-5039147 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-50391472016-10-03 Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure Lee, Du-Yeong Lee, Seung-Eun Shim, Tae-Hun Park, Jea-Gun Nanoscale Res Lett Nano Express For the perpendicular-magnetic-tunneling-junction (p-MTJ) spin valve with a nanoscale-thick bottom Co(2)Fe(6)B(2) free layer ex situ annealed at 400 °C, which has been used as a common p-MTJ structure, the Pt atoms of the Pt buffer layer diffused into the MgO tunneling barrier. This transformed the MgO tunneling barrier from a body-centered cubic (b.c.c) crystallized layer into a mixture of b.c.c, face-centered cubic, and amorphous layers and rapidly decreased the tunneling-magnetoresistance (TMR) ratio. The p-MTJ spin valve with a nanoscale-thick top Co(2)Fe(6)B(2) free layer could prevent the Pt atoms diffusing into the MgO tunneling barrier during ex situ annealing at 400 °C because of non-necessity of a Pt buffer layer, demonstrating the TMR ratio of ~143 %. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s11671-016-1637-9) contains supplementary material, which is available to authorized users. Springer US 2016-09-27 /pmc/articles/PMC5039147/ /pubmed/27677304 http://dx.doi.org/10.1186/s11671-016-1637-9 Text en © The Author(s). 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Nano Express Lee, Du-Yeong Lee, Seung-Eun Shim, Tae-Hun Park, Jea-Gun Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure |
title | Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure |
title_full | Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure |
title_fullStr | Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure |
title_full_unstemmed | Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure |
title_short | Tunneling-Magnetoresistance Ratio Comparison of MgO-Based Perpendicular-Magnetic-Tunneling-Junction Spin Valve Between Top and Bottom Co(2)Fe(6)B(2) Free Layer Structure |
title_sort | tunneling-magnetoresistance ratio comparison of mgo-based perpendicular-magnetic-tunneling-junction spin valve between top and bottom co(2)fe(6)b(2) free layer structure |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5039147/ https://www.ncbi.nlm.nih.gov/pubmed/27677304 http://dx.doi.org/10.1186/s11671-016-1637-9 |
work_keys_str_mv | AT leeduyeong tunnelingmagnetoresistanceratiocomparisonofmgobasedperpendicularmagnetictunnelingjunctionspinvalvebetweentopandbottomco2fe6b2freelayerstructure AT leeseungeun tunnelingmagnetoresistanceratiocomparisonofmgobasedperpendicularmagnetictunnelingjunctionspinvalvebetweentopandbottomco2fe6b2freelayerstructure AT shimtaehun tunnelingmagnetoresistanceratiocomparisonofmgobasedperpendicularmagnetictunnelingjunctionspinvalvebetweentopandbottomco2fe6b2freelayerstructure AT parkjeagun tunnelingmagnetoresistanceratiocomparisonofmgobasedperpendicularmagnetictunnelingjunctionspinvalvebetweentopandbottomco2fe6b2freelayerstructure |