Tunable exchange bias in dilute magnetic alloys: chiral spin glasses
2016 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 6, 19964Article in journal (Refereed) PublishedText
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
Condensed Matter Physics Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-277783DOI: 10.1038/srep19964ISI: 000368777300001PubMedID: 26817418OAI: oai:DiVA.org:uu-277783DiVA: diva2:905811
FunderSwedish Research CouncilGöran Gustafsson Foundation for promotion of scientific research at Uppala University and Royal Institute of Technology