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Effects of substitu...
Effects of substitution on the exchange stiffness and magnetization of Co films
- Article/chapterEnglish2014
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LIBRIS-ID:oai:DiVA.org:uu-239091
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-239091URI
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https://doi.org/10.1103/PhysRevB.90.235408DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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An antiferromagnetically coupled FM/NM/FM (FM = ferromagnet, NM = normal metal) trilayer structure responds to an external magnetic field by the formation of a magnetic-moment spring within the FM layers. We show that the exchange stiffness (A ex) of an FM layer can be determined by fitting the field-dependent magnetization, M(H), of the FM/NM/FM trilayer to a micromagnetic model. Using this method, we have measured the exchange stiffness of thin-film Co alloyed with Cr, Fe, Ni, Pd, Pt, and Ru. The results show that the rate at which a substituent element reduces the exchange stiffness is not directly related to its effect on the magnetization of the alloy. The observed trends have been understood by material-specific modeling based on density functional theory within the local density approximation. The stiffness measurements are in agreement with Brillouin light scattering carried out on thicker Co films.
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Zamani, AtiehUppsala universitet,Materialfysik(Swepub:uu)atiza376
(author)
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Huttema, W.
(author)
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Arora, M.
(author)
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Harrison, D.
(author)
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Rashidi, F.
(author)
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Broun, D.
(author)
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Heinrich, B.
(author)
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Mryasov, O.
(author)
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Ahlberg, MartinaUppsala universitet,Materialfysik(Swepub:uu)marah227
(author)
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Karis, OlofUppsala universitet,Molekyl- och kondenserade materiens fysik(Swepub:uu)olofkari
(author)
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Jönsson, Petra E.Uppsala universitet,Materialfysik(Swepub:uu)pjo09369
(author)
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From, M.
(author)
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Zhu, X.
(author)
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Girt, E.
(author)
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Uppsala universitetMaterialfysik
(creator_code:org_t)
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In:Physical Review B. Condensed Matter and Materials Physics90:23, s. 235408-1098-01211550-235X
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Eyrich, C.
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Zamani, Atieh
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Huttema, W.
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Arora, M.
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Harrison, D.
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Rashidi, F.
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Broun, D.
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Heinrich, B.
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Mryasov, O.
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Ahlberg, Martina
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Karis, Olof
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Jönsson, Petra E ...
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From, M.
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Zhu, X.
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Girt, E.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Uppsala University