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Tailoring the Nature of Magnetic Coupling of Fe-Porphyrin Molecules to Ferromagnetic Substrates
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Materials Science.
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2009 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 102, no 4, 047202- p.Article in journal (Refereed) Published
Abstract [en]

We demonstrate that an antiferromagnetic coupling between paramagnetic Fe-porphyrin molecules and ultrathin Co and Ni magnetic films on Cu(100) substrates can be established by an intermediate layer of atomic oxygen. The coupling energies have been determined from the temperature dependence of x-ray magnetic circular dichroism measurements. By density functional theory+U calculations the coupling mechanism is shown to be superexchange between the Fe center of the molecules and Co surface-atoms, mediated by oxygen.

Place, publisher, year, edition, pages
2009. Vol. 102, no 4, 047202- p.
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Physical Sciences
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URN: urn:nbn:se:uu:diva-137329DOI: 10.1103/PhysRevLett.102.047202ISI: 000262978600066OAI: oai:DiVA.org:uu-137329DiVA: diva2:378147
Available from: 2010-12-15 Created: 2010-12-15 Last updated: 2017-12-11Bibliographically approved

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Oppeneer, Peter M.Eriksson, Olle

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