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Effect of atomic ordering on the magnetic anisotropy of single crystal Ni80Fe20

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dc.contributor Háskóli Íslands
dc.contributor University of Iceland
dc.contributor.author Kateb, Movaffaq
dc.contributor.author Gudmundsson, Jon Tomas
dc.contributor.author Ingvarsson, Snorri
dc.date.accessioned 2020-05-14T13:11:09Z
dc.date.available 2020-05-14T13:11:09Z
dc.date.issued 2019-03-08
dc.identifier.citation Kateb, M., Gudmundsson, J. T., & Ingvarsson, S. (2019). Effect of atomic ordering on the magnetic anisotropy of single crystal Ni80Fe20. 9(3), 035308. doi:10.1063/1.5088602
dc.identifier.issn 2158-3226
dc.identifier.uri https://hdl.handle.net/20.500.11815/1795
dc.description Publisher's version (útgefin grein)
dc.description.abstract We investigate the effect of atomic ordering on the magnetic anisotropy of Ni80Fe20 at.% (Py). To this end, Py films were grown epitaxially on MgO(001) using dc magnetron sputtering (dcMS) and high power impulse magnetron sputtering (HiPIMS). Aside from twin boundaries observed in the latter case, both methods present high quality single crystals with cube-on-cube epitaxial relationship as verified by the polar mapping of important crystal planes. However, X-ray diffraction results indicate higher order for the dcMS deposited film towards L12 Ni3Fe superlattice. This difference can be understood by the very high deposition rate of HiPIMS during each pulse which suppresses adatom mobility and ordering. We show that the dcMS deposited film presents biaxial anisotropy while HiPIMS deposition gives well defined uniaxial anisotropy. Thus, higher order achieved in the dcMS deposition behaves as predicted by magnetocrystalline anisotropy i.e. easy axis along the [111] direction that forced in the plane along the [110] direction due to shape anisotropy. The uniaxial behaviour in HiPIMS deposited film then can be explained by pair ordering or more recent localized composition non-uniformity theories. Further, we studied magnetoresistance of the films along the [100] directions using an extended van der Pauw method. We find that the electrical resistivities of the dcMS deposited film are lower than in their HiPIMS counterparts verifying the higher order in the dcMS case.
dc.description.sponsorship This work was partially supported by the Icelandic Research Fund (Rannis) Grant Nos. 196141, 130029 and 120002023, and the Swedish Government Agency for Innovation Systems (VINNOVA) contract No. 2014-04876.
dc.format.extent 035308
dc.language.iso en
dc.publisher AIP Publishing
dc.relation.ispartofseries AIP Advances;9(3)
dc.rights info:eu-repo/semantics/openAccess
dc.subject General Physics and Astronomy
dc.subject Atomic ordering
dc.subject Anisotropy
dc.subject Ni80Fe20
dc.subject Eðlisfræði
dc.subject Atómfræði
dc.title Effect of atomic ordering on the magnetic anisotropy of single crystal Ni80Fe20
dc.type info:eu-repo/semantics/article
dcterms.license All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/1.5088602
dc.description.version Peer Reviewed
dc.identifier.journal AIP Advances
dc.identifier.doi 10.1063/1.5088602
dc.relation.url http://aip.scitation.org/doi/pdf/10.1063/1.5088602
dc.contributor.department Raunvísindastofnun (HÍ)
dc.contributor.department Science Institute (UI)
dc.contributor.school Verkfræði- og náttúruvísindasvið (HÍ)
dc.contributor.school School of Engineering and Natural Sciences (UI)

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