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Tunable exchange bias in dilute magnetic alloys: chiral spin glasses
Stockholm Univ, Dept Phys, Chem Phys, SE-10691 Stockholm, Sweden..
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 19964Article in journal (Refereed) Published
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Abstract [en]

A unidirectional anisotropy appears in field cooled samples of dilute magnetic alloys at temperatures well below the cusp temperature of the zero field cooled magnetization curve. Magnetization measurements on a Cu(13.5 at% Mn) sample show that this anisotropy is essentially temperature independent and acts on a temperature dependent excess magnetization, Delta M. The anisotropy can be partially or fully transferred from being locked to the direction of the cooling field at lower fields to becoming locked to the direction of Delta M at larger fields, thus instead appearing as a uniaxial anisotropy. This introduces a deceiving division of the anisotropy into a superposition of a unidirectional and a uniaxial part. This two faced nature of the anisotropy has been empirically scrutinized and concluded to originate from one and the same exchange mechanism: the Dzyaloshinsky-Moriya interaction.

Place, publisher, year, edition, pages
2016. Vol. 6, 19964
National Category
Condensed Matter Physics Engineering and Technology
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URN: urn:nbn:se:uu:diva-277783DOI: 10.1038/srep19964ISI: 000368777300001PubMedID: 26817418OAI: oai:DiVA.org:uu-277783DiVA: diva2:905811
Funder
Swedish Research CouncilGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology
Available from: 2016-02-23 Created: 2016-02-23 Last updated: 2017-11-30Bibliographically approved

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Hudl, MatthiasMathieu, RolandNordblad, Per

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