Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Role of boron diffusion in CoFeB/MgO magnetic tunnel junctions
Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore, India.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Show others and affiliations
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, ISSN 1098-0121, Vol. 91, no 8, 085311Article in journal (Refereed) Published
Abstract [en]

Several scientific issues concerning the latest generation read heads for magnetic storage devices, based on CoFeB/MgO/CoFeB magnetic tunnel junctions (MTJs) are known to be controversial, including such fundamental questions as to the behavior and the role of B in optimizing the physical properties of these devices. Quantitatively establishing the internal structures of several such devices with different annealing conditions using hard x-ray photoelectron spectroscopy, we resolve these controversies and establish that the B diffusion is controlled by the capping Ta layer, though Ta is physically separated from the layer with B by several nanometers. While explaining this unusual phenomenon, we also provide insight into why the tunneling magnetoresistance (TMR) is optimized at an intermediate annealing temperature, relating it to B diffusion, coupled with our studies based on x-ray diffraction and magnetic studies.

Place, publisher, year, edition, pages
2015. Vol. 91, no 8, 085311
National Category
Condensed Matter Physics
Research subject
Physics with spec. in Atomic, Molecular and Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-247784DOI: 10.1103/PhysRevB.91.085311ISI: 000350319200013Scopus ID: 2-s2.0-84924081350OAI: oai:DiVA.org:uu-247784DiVA: diva2:797426
Available from: 2015-03-23 Created: 2015-03-23 Last updated: 2017-12-04Bibliographically approved

Open Access in DiVA

fulltext(851 kB)212 downloads
File information
File name FULLTEXT01.pdfFile size 851 kBChecksum SHA-512
1fc9e58a51b7421c3027c847a223e1fc4c89606be8145dbe674da343ec63e8ef18e7f306309db776c17a9a657e6d1e27f4cf8d9d36e759c395f6b9a659ea8c37
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Knut, RonnyKaris, Olof
By organisation
Molecular and condensed matter physics
In the same journal
Physical Review B. Condensed Matter and Materials Physics
Condensed Matter Physics

Search outside of DiVA

GoogleGoogle Scholar
Total: 212 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 680 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf