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Magnetic anisotropy in (Ga,Mn)As : Influence of epitaxial strain and hole concentration

Magnetic anisotropy in (Ga,Mn)As : Influence of epitaxial strain and hole concentration

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GLUNK, Michael, Joachim DAEUBLER, Lukas DREHER, Stephan SCHWAIGER, Wladimir SCHOCH, Rolf SAUER, Wolfgang LIMMER, Andreas BRANDLMAIER, Sebastian T. B. GÖNNENWEIN, Christoph BIHLER, 2009. Magnetic anisotropy in (Ga,Mn)As : Influence of epitaxial strain and hole concentration. In: Physical Review B. American Physical Society (APS). 79(19), 195206. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.79.195206

@article{Glunk2009Magne-52543, title={Magnetic anisotropy in (Ga,Mn)As : Influence of epitaxial strain and hole concentration}, year={2009}, doi={10.1103/PhysRevB.79.195206}, number={19}, volume={79}, issn={2469-9950}, journal={Physical Review B}, author={Glunk, Michael and Daeubler, Joachim and Dreher, Lukas and Schwaiger, Stephan and Schoch, Wladimir and Sauer, Rolf and Limmer, Wolfgang and Brandlmaier, Andreas and Gönnenwein, Sebastian T. B. and Bihler, Christoph}, note={Article Number: 195206} }

<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/rdf/resource/123456789/52543"> <dcterms:abstract xml:lang="eng">We present a systematic study on the influence of epitaxial strain and hole concentration on the magnetic anisotropy in (Ga,Mn)As at 4.2 K. The strain was gradually varied over a wide range from tensile to compressive by growing a series of (Ga,Mn)As layers with 5% Mn on relaxed graded (In,Ga)As/GaAs templates with different In concentration. The hole density, the Curie temperature, and the relaxed lattice constant of the as-grown and annealed (Ga,Mn)As layers turned out to be essentially unaffected by the strain. Angle-dependent magnetotransport measurements performed at different magnetic-field strengths were used to probe the magnetic anisotropy. The measurements reveal a pronounced linear dependence of the uniaxial out-of-plane anisotropy on both strain and hole density. Whereas the uniaxial and cubic in-plane anisotropies are nearly constant, the cubic out-of-plane anisotropy changes sign when the magnetic easy axis flips from in-plane to out-of-plane. The experimental results for the magnetic anisotropy are quantitatively compared with calculations of the free energy based on a mean-field Zener model. Almost perfect agreement between experiment and theory is found for the uniaxial out-of-plane and cubic in-plane anisotropy parameters of the as-grown samples. In addition, magnetostriction constants are derived from the anisotropy data.</dcterms:abstract> <dc:contributor>Glunk, Michael</dc:contributor> <dc:contributor>Limmer, Wolfgang</dc:contributor> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dc:contributor>Brandlmaier, Andreas</dc:contributor> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-01-22T12:32:01Z</dcterms:available> <dc:creator>Limmer, Wolfgang</dc:creator> <dc:creator>Daeubler, Joachim</dc:creator> <dc:contributor>Bihler, Christoph</dc:contributor> <dc:creator>Gönnenwein, Sebastian T. B.</dc:creator> <dc:creator>Schoch, Wladimir</dc:creator> <dc:creator>Schwaiger, Stephan</dc:creator> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2021-01-22T12:32:01Z</dc:date> <dc:contributor>Daeubler, Joachim</dc:contributor> <dc:rights>terms-of-use</dc:rights> <dc:contributor>Schwaiger, Stephan</dc:contributor> <dc:contributor>Sauer, Rolf</dc:contributor> <dc:contributor>Gönnenwein, Sebastian T. B.</dc:contributor> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/52543"/> <dc:creator>Glunk, Michael</dc:creator> <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/> <dc:creator>Bihler, Christoph</dc:creator> <dc:contributor>Dreher, Lukas</dc:contributor> <dc:language>eng</dc:language> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:creator>Sauer, Rolf</dc:creator> <dc:creator>Dreher, Lukas</dc:creator> <dc:contributor>Schoch, Wladimir</dc:contributor> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Brandlmaier, Andreas</dc:creator> <dcterms:issued>2009</dcterms:issued> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/41"/> <dcterms:title>Magnetic anisotropy in (Ga,Mn)As : Influence of epitaxial strain and hole concentration</dcterms:title> </rdf:Description> </rdf:RDF>

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