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dc.contributor.authorTveten, Erlend Grytli
dc.contributor.authorMuller, Tristan
dc.contributor.authorLinder, Jacob
dc.contributor.authorBrataas, Arne
dc.date.accessioned2017-11-09T09:52:56Z
dc.date.available2017-11-09T09:52:56Z
dc.date.created2016-03-10T09:16:31Z
dc.date.issued2016
dc.identifier.citationPhysical Review B. Condensed Matter and Materials Physics. 2016, 93 (10), .nb_NO
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11250/2465153
dc.description.abstractAntiferromagnets (AFMs) exhibit intrinsic magnetization when the order parameter spatially varies. This intrinsic spin is present even at equilibrium and can be interpreted as a twisting of the homogeneous AFM into a state with a finite spin. Because magnetic moments couple directly to external magnetic fields, the intrinsic magnetization can alter the dynamics of antiferromagnetic textures under such influence. Starting from the discrete Heisenberg model, we derive the continuum limit of the free energy of AFMs in the exchange approximation and explicitly rederive that the spatial variation of the antiferromagnetic order parameter is associated with an intrinsic magnetization density. We calculate the magnetization profile of a domain wall and discuss how the intrinsic magnetization reacts to external forces. We show conclusively, both analytically and numerically, that a spatially inhomogeneous magnetic field can move and control the position of domain walls in AFMs. By comparing our model to a commonly used alternative parametrization procedure for the continuum fields, we show that the physical interpretations of these fields depend critically on the choice of parametrization procedure for the discrete-to-continuous transition. This can explain why a significant amount of recent studies of the dynamics of AFMs, including effective models that describe the motion of antiferromagnetic domain walls, have neglected the intrinsic spin of the textured order parameter.nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Physical Societynb_NO
dc.titleIntrinsic magnetization of antiferromagnetic texturesnb_NO
dc.typeJournal articlenb_NO
dc.description.versionsubmittedVersionnb_NO
dc.source.pagenumber13nb_NO
dc.source.volume93nb_NO
dc.source.journalPhysical Review B. Condensed Matter and Materials Physicsnb_NO
dc.source.issue10nb_NO
dc.identifier.doi10.1103/PhysRevB.93.104408
dc.identifier.cristin1343469
dc.description.localcode© 2016 American Physical Society. This is the authors' manuscript to the article (preprint).nb_NO
cristin.unitcode194,66,20,0
cristin.unitnameInstitutt for fysikk
cristin.ispublishedtrue
cristin.fulltextpreprint
cristin.qualitycode2


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