Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3 from first principles

Szunyogh, László; Lazarovits, Bence; Udvardi, László; Jackson, Jerome; Nowak, Ulrich

Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3 from first principles

Files

giantmagnetic.pdf(332.63 KB)

Date

2009

Authors

Szunyogh, László

Lazarovits, Bence

Udvardi, László

Jackson, Jerome

Nowak, Ulrich

Publication type

Journal article

Published in

Physical Review B ; 79 (2009). - 20403

Abstract

We perform an ab initio study of the ordered phases of IrMn and IrMn3, the most widely used industrial antiferromagnets. Calculation of the form and the strength of the magnetic anisotropy allows the construction of an effective spin model, which is tested against experimental measurements regarding the magnetic ground state and the Néel temperature. Our most challenging result is the extremely strong second-order anisotropy for IrMn3 appearing in its frustrated triangular magnetic ground state, which is surprising since the ordered L12 phase has a cubic symmetry. We explain this large anisotropy by the fact that cubic symmetry is locally broken for each of the three Mn sublattices.

Subject (DDC)

530 Physics

Keywords

Exchange bias,Antiferromagnet,Magnetic

Cite This

ISO 690

SZUNYOGH, László, Bence LAZAROVITS, László UDVARDI, Jerome JACKSON, Ulrich NOWAK, 2009. Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3 from first principles. In: Physical Review B. 79, 20403. Available under: doi: 10.1103/PhysRevB.79.020403

BibTex

@article{Szunyogh2009Giant-9241,
  year={2009},
  doi={10.1103/PhysRevB.79.020403},
  title={Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3 from first principles},
  volume={79},
  journal={Physical Review B},
  author={Szunyogh, László and Lazarovits, Bence and Udvardi, László and Jackson, Jerome and Nowak, Ulrich},
  note={Article Number: 20403}
}

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/123456789/9241">
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:creator>Szunyogh, László</dc:creator>
    <dc:contributor>Udvardi, László</dc:contributor>
    <dc:creator>Nowak, Ulrich</dc:creator>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9241/1/giantmagnetic.pdf"/>
    <dc:contributor>Nowak, Ulrich</dc:contributor>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:contributor>Jackson, Jerome</dc:contributor>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:54:49Z</dcterms:available>
    <dc:rights>terms-of-use</dc:rights>
    <dc:creator>Jackson, Jerome</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:contributor>Szunyogh, László</dc:contributor>
    <dc:contributor>Lazarovits, Bence</dc:contributor>
    <dc:creator>Lazarovits, Bence</dc:creator>
    <dc:creator>Udvardi, László</dc:creator>
    <dc:format>application/pdf</dc:format>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/9241/1/giantmagnetic.pdf"/>
    <dc:language>eng</dc:language>
    <dcterms:bibliographicCitation>First publ. in: Physical Review B 79 (2009), 020403</dcterms:bibliographicCitation>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:54:49Z</dc:date>
    <dcterms:issued>2009</dcterms:issued>
    <dcterms:title>Giant magnetic anisotropy of the bulk antiferromagnets IrMn and IrMn3 from first principles</dcterms:title>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/9241"/>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dcterms:abstract xml:lang="eng">We perform an ab initio study of the ordered phases of IrMn and IrMn3, the most widely used industrial antiferromagnets. Calculation of the form and the strength of the magnetic anisotropy allows the construction of an effective spin model, which is tested against experimental measurements regarding the magnetic ground state and the Néel temperature. Our most challenging result is the extremely strong second-order anisotropy for IrMn3 appearing in its frustrated triangular magnetic ground state, which is surprising since the ordered L12 phase has a cubic symmetry. We explain this large anisotropy by the fact that cubic symmetry is locally broken for each of the three Mn sublattices.</dcterms:abstract>
  </rdf:Description>
</rdf:RDF>

Bibliography of Konstanz

Yes