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Giant magnetic proximity effect in amorphous layered magnets
Univ Iceland, Sci Inst, Dunhaga 3, IS-107 Reykjavik, Iceland.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.ORCID iD: 0000-0003-1803-9467
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2019 (English)In: PHYSICAL REVIEW MATERIALS, ISSN 2475-9953, Vol. 3, no 5, article id 054409Article in journal (Refereed) Published
Abstract [en]

Here we study the magnetic proximity effect in amorphous layered magnets of alternating high- and low-T-c materials using magnetometry and polarized neutron reflectivity. By altering the thickness of either the high-or low-T-c layer we are able to extract the induced magnetic moment in the low-T-c layer directly and study how it scales with thickness. We observe that the ordering temperature of the low-T-c layer is enhanced and above which a second magnetically ordered state with a very large extension is observed. This induced magnetic state survives to a temperature at least three times that of the ordering temperature of the low-T-c layer and the induced magnetization is approximately constant throughout at least a 10-nm-thick layer. The induced magnetic region within the low-T-c layer does not depend on the thickness of the adjacent high-T-c layer.

Place, publisher, year, edition, pages
2019. Vol. 3, no 5, article id 054409
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-387591DOI: 10.1103/PhysRevMaterials.3.054409ISI: 000469048500002OAI: oai:DiVA.org:uu-387591DiVA, id: diva2:1331300
Funder
Swedish Research CouncilAvailable from: 2019-06-26 Created: 2019-06-26 Last updated: 2019-06-26Bibliographically approved

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Palonen, HeikkiPálsson, Gunnar K.Hjörvarsson, BjörgvinMagnus, Fridrik

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