hh.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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
Magnetoresistance in Mn ion-implanted GaAs:Zn nanowires
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab. Solid State Physics/The Nanometer Structure Consortium, Lund University, Lund, Sweden.
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab. Solid State Physics/The Nanometer Structure Consortium, Lund University, Lund, Sweden.
Solid State Physics/The Nanometer Structure Consortium, Lund University, Lund, Sweden.ORCID iD: 0000-0001-5774-5116
Institute for Solid State Physics, Jena University, Jena, Germany.
Show others and affiliations
2014 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 104, no 15, article id 153112Article in journal (Refereed) Published
Abstract [en]

We have investigated the magnetoresistance (MR) in a series of Zn doped (p-type) GaAs nanowires implanted with different Mn concentrations. The nanowires with the lowest Mn concentration (~0.0001%) exhibit a low resistance of a few kΩ at 300K and a 4% positive MR at 1.6K, which can be well described by invoking a spin-split subband model. In contrast, nanowires with the highest Mn concentration (4%) display a large resistance of several MΩ at 300K and a large negative MR of 85% at 1.6K. The large negative MR is interpreted in terms of spin-dependent hopping in a complex magnetic nanowire landscape of magnetic polarons, separated by intermediate regions of Mn impurity spins. Sweeping the magnetic field back and forth for the 4% sample reveals a hysteresis that indicates the presence of a weak ferromagnetic phase. We propose co-doping with Zn to be a promising way to reach the goal of realizing ferromagnetic Ga1-xMnxAs nanowires for future nanospintronics. © 2014 AIP Publishing LLC.

Place, publisher, year, edition, pages
New York: American Institute of Physics (AIP), 2014. Vol. 104, no 15, article id 153112
Keywords [en]
Nanospintronics, Ion-implantation, GaMnAs, Nanowires, hopping transport, Negative magnetoresistance
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:hh:diva-25126DOI: 10.1063/1.4870423ISI: 000335145200060Scopus ID: 2-s2.0-84899622402OAI: oai:DiVA.org:hh-25126DiVA, id: diva2:713170
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research
Note

W. Paschoal, Jr. and S. Kumar contributed equally to this work and are co-first authors. The authors acknowledge financial support from nmC@LU, the Swedish Research Council (VR), the Knut and Alice Wallenberg Foundation, the Swedish National Board for Industrial, Technological Development, the Swedish Foundation for Strategic Research, the Nordforsk research network “Nanospintronics; theory and simulations,” and the German Research Society (DFG) Project Ro1198/14. One of the authors, W.P., Jr., gratefully acknowledges financial support from the Pará Education Secretary (SEDUC) and the Pará Government School (EGPA).

Available from: 2014-04-22 Created: 2014-04-22 Last updated: 2018-04-03Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Paschoal Jr., WaldomiroKumar, SandeepJacobsson, DanielJain, VishalPertsova, AnnaDick, Kimberly A.Samuelson, LarsPettersson, Håkan

Search in DiVA

By author/editor
Paschoal Jr., WaldomiroKumar, SandeepJacobsson, DanielJain, VishalPertsova, AnnaDick, Kimberly A.Samuelson, LarsPettersson, Håkan
By organisation
MPE-lab
In the same journal
Applied Physics Letters
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 168 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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