Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga<sub>1−x</sub>Mn<sub>x</sub> As alloys

Michel, Christoph; Baranovskii, Sergei; Thomas, Peter; Heimbrodt, Wolfram; Elm, Matthias T.; Klar, Peter J.; Goldlücke, Bastian; Wurstbauer, Ulrich; Reinwald, Matthias; Wegscheider, Werner

Publikation:
Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga_1−xMn_x As alloys

Dateien

Michel_255142.pdfGröße: 160.63 KBDownloads: 395

Datum

2007

Autor:innen

Michel, Christoph

Baranovskii, Sergei

Thomas, Peter

Heimbrodt, Wolfram

Elm, Matthias T.

Klar, Peter J.

Goldlücke, Bastian

Wurstbauer, Ulrich

Reinwald, Matthias

Wegscheider, Werner

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Informatik und Informationswissenschaft: Publikationen

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Applied Physics. 2007, 102(7), 073712. ISSN 0021-8979. eISSN 1089-7550. Available under: doi: 10.1063/1.2786556

Zusammenfassung

We study the changes of magnetoresistance induced by controlled thermal annealing at temperatures ranging from 300to600°C of a Ga_0.98Mn_0.02As alloy grown by low-temperature molecular beam epitaxy. We use a resistor-networkmodel for describing the electrical transport as a function of temperature and external magnetic field. The model is founded on classical semiconductor band transport and neglects many-body interactions. The peculiarities of dilute magnetic semiconductors, in particular, the magnetic-field induced changes of the density of states and the potential fluctuations due to the giant Zeeman splitting in the paramagnetic phase as well as spontaneous magnetization effects in the ferromagnetic phase, are accounted for in a mean-field fashion. This empirical transport model based on reasonable assumptions and realistic material parameters yields a satisfactory quantitative description of the experimentally obtained temperature and magnetic-field dependence of the resistivity of the entire series of annealedGa_0.98Mn_0.02As samples, which exhibit metallic, semiconducting, and almost insulating transport behavior with increasing annealingtemperature. Our analysis provides further understanding of the annealing-induced changes of the transport properties in dilute magnetic III-Mn-V semiconductors.

Fachgebiet (DDC)

004 Informatik

Schlagwörter

Annealing, Magnoresistance, Curie point, Ferromagnetism, Electrical resistivity

Zitieren

ISO 690

MICHEL, Christoph, Sergei BARANOVSKII, Peter THOMAS, Wolfram HEIMBRODT, Matthias T. ELM, Peter J. KLAR, Bastian GOLDLÜCKE, Ulrich WURSTBAUER, Matthias REINWALD, Werner WEGSCHEIDER, 2007. Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga_1−xMn_x As alloys. In: Journal of Applied Physics. 2007, 102(7), 073712. ISSN 0021-8979. eISSN 1089-7550. Available under: doi: 10.1063/1.2786556

BibTex

@article{Michel2007Quant-29127,
  year={2007},
  doi={10.1063/1.2786556},
  title={Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga<sub>1−x</sub>Mn<sub>x</sub> As alloys},
  number={7},
  volume={102},
  issn={0021-8979},
  journal={Journal of Applied Physics},
  author={Michel, Christoph and Baranovskii, Sergei and Thomas, Peter and Heimbrodt, Wolfram and Elm, Matthias T. and Klar, Peter J. and Goldlücke, Bastian and Wurstbauer, Ulrich and Reinwald, Matthias and Wegscheider, Werner},
  note={Article Number: 073712}
}

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/123456789/29127">
    <dc:contributor>Michel, Christoph</dc:contributor>
    <dc:rights>terms-of-use</dc:rights>
    <dc:contributor>Heimbrodt, Wolfram</dc:contributor>
    <dcterms:abstract xml:lang="eng">We study the changes of magnetoresistance induced by controlled thermal annealing at temperatures ranging from 300to600°C of a Ga&lt;sub&gt;0.98&lt;/sub&gt;Mn&lt;sub&gt;0.02&lt;/sub&gt;As alloy grown by low-temperature molecular beam epitaxy. We use a resistor-networkmodel for describing the electrical transport as a function of temperature and external magnetic field. The model is founded on classical semiconductor band transport and neglects many-body interactions. The peculiarities of dilute magnetic semiconductors, in particular, the magnetic-field induced changes of the density of states and the potential fluctuations due to the giant Zeeman splitting in the paramagnetic phase as well as spontaneous magnetization effects in the ferromagnetic phase, are accounted for in a mean-field fashion. This empirical transport model based on reasonable assumptions and realistic material parameters yields a satisfactory quantitative description of the experimentally obtained temperature and magnetic-field dependence of the resistivity of the entire series of annealedGa&lt;sub&gt;0.98&lt;/sub&gt;Mn&lt;sub&gt;0.02&lt;/sub&gt;As samples, which exhibit metallic, semiconducting, and almost insulating transport behavior with increasing annealingtemperature. Our analysis provides further understanding of the annealing-induced changes of the transport properties in dilute magnetic III-Mn-V semiconductors.</dcterms:abstract>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/29127/1/Michel_255142.pdf"/>
    <dc:creator>Wegscheider, Werner</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/36"/>
    <dcterms:issued>2007</dcterms:issued>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2014-10-16T11:00:09Z</dcterms:available>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/36"/>
    <dc:creator>Thomas, Peter</dc:creator>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Reinwald, Matthias</dc:contributor>
    <dc:creator>Klar, Peter J.</dc:creator>
    <dc:creator>Elm, Matthias T.</dc:creator>
    <dc:contributor>Goldlücke, Bastian</dc:contributor>
    <dc:creator>Goldlücke, Bastian</dc:creator>
    <dc:contributor>Thomas, Peter</dc:contributor>
    <dc:creator>Wurstbauer, Ulrich</dc:creator>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/29127"/>
    <dcterms:title>Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga&lt;sub&gt;1−x&lt;/sub&gt;Mn&lt;sub&gt;x&lt;/sub&gt; As alloys</dcterms:title>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/29127/1/Michel_255142.pdf"/>
    <dc:creator>Heimbrodt, Wolfram</dc:creator>
    <dc:creator>Baranovskii, Sergei</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2014-10-16T11:00:09Z</dc:date>
    <dc:creator>Reinwald, Matthias</dc:creator>
    <dc:contributor>Baranovskii, Sergei</dc:contributor>
    <dc:contributor>Elm, Matthias T.</dc:contributor>
    <dc:contributor>Wurstbauer, Ulrich</dc:contributor>
    <dc:creator>Michel, Christoph</dc:creator>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:contributor>Klar, Peter J.</dc:contributor>
    <dc:language>eng</dc:language>
    <dc:contributor>Wegscheider, Werner</dc:contributor>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Nein

Publikation: Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga1−xMnx As alloys

Dateien

Datum

Autor:innen

Herausgeber:innen

Kontakt

ISSN der Zeitschrift

Electronic ISSN

ISBN

Bibliografische Daten

Verlag

Schriftenreihe

Auflagebezeichnung

URI (zitierfähiger Link)

DOI (zitierfähiger Link)

ArXiv-ID

Internationale Patentnummer

Link zur Lizenz

Angaben zur Forschungsförderung

Projekt

Open Access-Veröffentlichung

Sammlungen

Core Facility der Universität Konstanz

Gesperrt bis

Titel in einer weiteren Sprache

Publikationstyp

Publikationsstatus

Erschienen in

Zusammenfassung

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)

Schlagwörter

Konferenz

Rezension

Forschungsvorhaben

Organisationseinheiten

Zeitschriftenheft

Zugehörige Datensätze in KOPS

Zitieren

Interner Vermerk

xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter

Kontakt

URL der Originalveröffentl.

Prüfdatum der URL

Prüfungsdatum der Dissertation

Finanzierungsart

Kommentar zur Publikation

Allianzlizenz

Corresponding Authors der Uni Konstanz vorhanden

Internationale Co-Autor:innen

Universitätsbibliographie

Begutachtet

Diese Publikation teilen

Publikation:
Quantitative modeling of the annealing-induced changes of the magnetotransport in Ga_1−xMn_x As alloys