Magnetoresistance of atomic-size contacts realized with mechanically controllable break junctions

We present a comprehensive study of the conductance behavior of atomic-size contacts made of ferromagnetic metals (Co) or noble metals (Au) with ferromagnetic electrodes (Co). In order to separate the influence of the large electrodes from the influence of the contacts themselves, we used different sample geometries. These include combinations of nonmagnetic electrodes connected to magnetic bridges and vice versa as well as different orientations of the magnetic field. The magnetoresistance (MR) curves show very rich behavior with strong MR ratios (MRR). In all geometries the MRR values are of comparable size, reaching up to a few thousand percent in the tunneling regime. We study the possible influence of the micromagnetic order of the domains in the vicinity of the contact as well as ballistic MR, giant MR, tunnel MR, atomically enhanced anisotropic MR (AAMR), and magnetostriction. We conclude that AAMR is the most important origin for the MR at high magnetic fields (|B|>2 T), while magnetostriction, tunnel MR, and giant MR govern the low-field regime (|B|

Subject (DDC)

530 Physics

Keywords

break junctions

Cite This

ISO 690

EGLE, Stefan, Cecile BACCA, Hans PERNAU, Magdalena HUEFNER, Denise HINZKE, Ulrich NOWAK, Elke SCHEER, 2010. Magnetoresistance of atomic-size contacts realized with mechanically controllable break junctions. In: Physical Review B. 81(13), 134402. Available under: doi: 10.1103/PhysRevB.81.134402

BibTex

@article{Egle2010Magne-5085,
  year={2010},
  doi={10.1103/PhysRevB.81.134402},
  title={Magnetoresistance of atomic-size contacts realized with mechanically controllable break junctions},
  number={13},
  volume={81},
  journal={Physical Review B},
  author={Egle, Stefan and Bacca, Cecile and Pernau, Hans and Huefner, Magdalena and Hinzke, Denise and Nowak, Ulrich and Scheer, Elke},
  note={Article Number: 134402}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/5085">
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Bacca, Cecile</dc:contributor>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/5085/1/Magnetoresistance_Egle.pdf"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/5085/1/Magnetoresistance_Egle.pdf"/>
    <dc:contributor>Scheer, Elke</dc:contributor>
    <dc:rights>terms-of-use</dc:rights>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/5085"/>
    <dcterms:issued>2010</dcterms:issued>
    <dcterms:bibliographicCitation>First publ. in: Physical Review B, 81 (2010), 13, 134402</dcterms:bibliographicCitation>
    <dc:contributor>Egle, Stefan</dc:contributor>
    <dc:creator>Scheer, Elke</dc:creator>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:53:02Z</dcterms:available>
    <dc:contributor>Nowak, Ulrich</dc:contributor>
    <dcterms:title>Magnetoresistance of atomic-size contacts realized with mechanically controllable break junctions</dcterms:title>
    <dc:creator>Pernau, Hans</dc:creator>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:creator>Hinzke, Denise</dc:creator>
    <dc:contributor>Hinzke, Denise</dc:contributor>
    <dc:creator>Huefner, Magdalena</dc:creator>
    <dc:creator>Nowak, Ulrich</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T14:53:02Z</dc:date>
    <dc:creator>Egle, Stefan</dc:creator>
    <dc:contributor>Pernau, Hans</dc:contributor>
    <dcterms:abstract xml:lang="eng">We present a comprehensive study of the conductance behavior of  atomic-size contacts made of ferromagnetic metals (Co) or noble metals (Au) with ferromagnetic electrodes (Co). In order to separate the influence of the large electrodes from the influence of the contacts themselves, we used different sample geometries. These include combinations of nonmagnetic electrodes connected to magnetic bridges and vice versa as well as different orientations of the magnetic field. The magnetoresistance (MR) curves show very rich behavior with strong MR ratios (MRR). In all geometries the MRR values are of comparable size, reaching up to a few thousand percent in the tunneling regime. We study the possible influence of the micromagnetic order of the domains in the vicinity of the contact as well as ballistic MR, giant MR, tunnel MR, atomically enhanced anisotropic MR (AAMR), and magnetostriction. We conclude that AAMR is the most important origin for the MR at high magnetic fields (|B|&gt;2 T), while magnetostriction, tunnel MR, and giant MR govern the low-field regime (|B|</dcterms:abstract>
    <dc:creator>Bacca, Cecile</dc:creator>
    <dc:contributor>Huefner, Magdalena</dc:contributor>
    <dc:language>eng</dc:language>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:format>application/pdf</dc:format>
  </rdf:Description>
</rdf:RDF>

Bibliography of Konstanz

Yes