{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:52536"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:52536","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Magnetic domain walls in ultrathin films : contribution of the Dzyaloshinsky-Moriya interaction","abstract":"In this theoretical thesis the structure of magnetic domain walls is explained by an interplay of spin stiffness, anisotropy energy and Dzyaloshinsky-Moriya interaction. The wall structures are discussed within a micromagnetic model and the corresponding model parameters are obtained ab initio by electronic-structure calculations. The inclusion of the Dzyaloshinsky-Moriya interaction in these investigations is a new aspect. This interaction arises only in certain crystal symmetries, it is of particular importance in the studied ultrathin magnetic films deposited on non-magnetic surfaces. The Dzyaloshinsky-Moriya interaction leads to unusual domain-wall structures that can be classified in several distinct phases. The ab-initio calculations are done with the FLAPW method that relies on density functional theory. Within this method a perturbative approach is developed, that allows to estimate the effect of spin-orbit coupling on spin spirals with large spatial periods and thus allows to estimate the strength of the Dzyaloshinsky-Moriya interaction. The theory is applied to the system Fe/W(110), i.e. to the W(110)-surface covered with one respectively two atomic layers of Fe. The domain-wall widths are calculated and compared with experimental data. Furthermore, a new explanation is given for the experimentally observed phenomenon, that the domain walls in the Fe double-layer are preferably oriented along the [1-10]-direction.","abstract_html":"In this theoretical thesis the structure of magnetic domain walls is explained by an interplay of spin stiffness, anisotropy energy and Dzyaloshinsky-Moriya interaction. The wall structures are discussed within a micromagnetic model and the corresponding model parameters are obtained ab initio by electronic-structure calculations. The inclusion of the Dzyaloshinsky-Moriya interaction in these investigations is a new aspect. This interaction arises only in certain crystal symmetries, it is of particular importance in the studied ultrathin magnetic films deposited on non-magnetic surfaces. The Dzyaloshinsky-Moriya interaction leads to unusual domain-wall structures that can be classified in several distinct phases. The ab-initio calculations are done with the FLAPW method that relies on density functional theory. Within this method a perturbative approach is developed, that allows to estimate the effect of spin-orbit coupling on spin spirals with large spatial periods and thus allows to estimate the strength of the Dzyaloshinsky-Moriya interaction. The theory is applied to the system Fe/W(110), i.e. to the W(110)-surface covered with one respectively two atomic layers of Fe. The domain-wall widths are calculated and compared with experimental data. Furthermore, a new explanation is given for the experimentally observed phenomenon, that the domain walls in the Fe double-layer are preferably oriented along the [1-10]-direction.","abstract_has_math":false,"creators":["Heide, Marcus"],"institution":"Publikationsserver der RWTH Aachen University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Blügel, Stefan"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2006,"date_issued":"2006","date_published":"2006","updated_at":"2026-07-30T19:41:00Z","subjects":["info:eu-repo/classification/ddc/530","Physik","magnetic domain walls","Dzyaloshinsky-Moriya interaction","density functional theory","magnetic phase transition","spin-orbit coupling"],"languages":["eng"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-114752%22"],"render_values":[{"text":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-114752%22","href":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-114752%22","code":true}]}]},"links":{"outbound_url":"https://publications.rwth-aachen.de/record/52536","outbound_label":"Repository record","outbound_source":"dc:identifier"},"source_record":{"url":"https://publications.rwth-aachen.de/oai2d?verb=GetRecord&metadataPrefix=oai_dc&identifier=oai%3Apublications.rwth-aachen.de%3A52536","prefix":"oai_dc"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Blügel, Stefan"]},{"key":"dc:creator","label":"Author","values":["Heide, Marcus"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:coverage","label":"Dc Coverage","values":["DE"]},{"key":"dc:date","label":"Dc Date","values":["2006"]},{"key":"dc:publisher","label":"Institution","values":["Publikationsserver der RWTH Aachen University"]},{"key":"dc:relation","label":"Dc Relation","values":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-16208"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["info:eu-repo/classification/ddc/530","Physik","magnetic domain walls","Dzyaloshinsky-Moriya interaction","density functional theory","magnetic phase transition","spin-orbit coupling"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/record/52536","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-114752%22"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["In this theoretical thesis the structure of magnetic domain walls is explained by an interplay of spin stiffness, anisotropy energy and Dzyaloshinsky-Moriya interaction. The wall structures are discussed within a micromagnetic model and the corresponding model parameters are obtained ab initio by electronic-structure calculations. The inclusion of the Dzyaloshinsky-Moriya interaction in these investigations is a new aspect. This interaction arises only in certain crystal symmetries, it is of particular importance in the studied ultrathin magnetic films deposited on non-magnetic surfaces. The Dzyaloshinsky-Moriya interaction leads to unusual domain-wall structures that can be classified in several distinct phases. The ab-initio calculations are done with the FLAPW method that relies on density functional theory. Within this method a perturbative approach is developed, that allows to estimate the effect of spin-orbit coupling on spin spirals with large spatial periods and thus allows to estimate the strength of the Dzyaloshinsky-Moriya interaction. The theory is applied to the system Fe/W(110), i.e. to the W(110)-surface covered with one respectively two atomic layers of Fe. The domain-wall widths are calculated and compared with experimental data. Furthermore, a new explanation is given for the experimentally observed phenomenon, that the domain walls in the Fe double-layer are preferably oriented along the [1-10]-direction."]},{"key":"dc:source","label":"Dc Source","values":["Aachen : Publikationsserver der RWTH Aachen University 127 S. : graph. Darst. (2006). = Aachen, Techn. Hochsch., Diss., 2006"]},{"key":"dc:title","label":"Title","values":["Magnetic domain walls in ultrathin films : contribution of the Dzyaloshinsky-Moriya interaction"]}]}],"canonical_facts":{"dc:contributor":["Blügel, Stefan"],"dc:coverage":["DE"],"dc:creator":["Heide, Marcus"],"dc:date":["2006"],"dc:description":["In this theoretical thesis the structure of magnetic domain walls is explained by an interplay of spin stiffness, anisotropy energy and Dzyaloshinsky-Moriya interaction. The wall structures are discussed within a micromagnetic model and the corresponding model parameters are obtained ab initio by electronic-structure calculations. The inclusion of the Dzyaloshinsky-Moriya interaction in these investigations is a new aspect. This interaction arises only in certain crystal symmetries, it is of particular importance in the studied ultrathin magnetic films deposited on non-magnetic surfaces. The Dzyaloshinsky-Moriya interaction leads to unusual domain-wall structures that can be classified in several distinct phases. The ab-initio calculations are done with the FLAPW method that relies on density functional theory. Within this method a perturbative approach is developed, that allows to estimate the effect of spin-orbit coupling on spin spirals with large spatial periods and thus allows to estimate the strength of the Dzyaloshinsky-Moriya interaction. The theory is applied to the system Fe/W(110), i.e. to the W(110)-surface covered with one respectively two atomic layers of Fe. The domain-wall widths are calculated and compared with experimental data. Furthermore, a new explanation is given for the experimentally observed phenomenon, that the domain walls in the Fe double-layer are preferably oriented along the [1-10]-direction."],"dc:identifier":["https://publications.rwth-aachen.de/record/52536","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-114752%22"],"dc:language":["eng"],"dc:publisher":["Publikationsserver der RWTH Aachen University"],"dc:relation":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-16208"],"dc:rights":["info:eu-repo/semantics/openAccess"],"dc:source":["Aachen : Publikationsserver der RWTH Aachen University 127 S. : graph. Darst. (2006). = Aachen, Techn. 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