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Evidence for a magnetic moment on Ir in IrMnAl from x-ray magnetic circular dichroism

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dc.contributor.authorKrishnamurthy, VV
dc.contributor.authorKawamura, N
dc.contributor.authorSuzuki, M
dc.contributor.authorIshikawa, T
dc.contributor.authorMankey, GJ
dc.contributor.authorRaj, P
dc.contributor.authorSathyamoorthy, A
dc.contributor.authorJoshi, AG
dc.contributor.authorMalik, SK
dc.contributor.otherRIKEN
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherJapan Synchrotron Radiation Research Institute
dc.contributor.otherBhabha Atomic Research Center (BARC)
dc.contributor.otherTata Institute of Fundamental Research (TIFR)
dc.date.accessioned2019-07-17T13:27:44Z
dc.date.available2019-07-17T13:27:44Z
dc.date.issued2003-12-10
dc.description.abstractWe have observed x-ray magnetic circular dichroism (XMCD) in the helicity modulation mode at Ir L-2,L-3 edges in the ferromagnet IrMnAl (Curie temperature 379 K) at room temperature, 100 K and 30 K. This observation proves that Ir has a 5d magnetic moment in IrMnAl. Using the magneto-optic sum rules, which relate the integrated intensity of the XMCD and x-ray absorption spectra to the expectation values of spin and orbital angular momenta of Ir, the orbital moment to spin moment ratio, the spin moment and the orbital moment of Ir at 30 K have been deduced to be -0.17(2), 0.018(1)mu(B), and -0.0031(8)mu(B), respectively. dc magnetization measurements yielded a total moment of 0.123mu(B)/atom showing that the magnetic moment of Mn is also strongly reduced. We suggest that the extremely small moments of Mn and Ir in IrMnAl are associated with the suppression of local moments and delocalization of 3d and 5d electrons due to their strong hybridization with the sp electrons of Al atoms.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationKrishnamurthy, V., et al. (2003): Evidence for a Magnetic Moment on Ir in IrMnAl from X-ray Magnetic Circular Dichroism. Physical Review B, 68(21). DOI: https://doi.org/10.1103/PhysRevB.68.214413
dc.identifier.doi10.1103/PhysRevB.68.214413
dc.identifier.orcidhttps://orcid.org/0000-0003-2760-7120
dc.identifier.orcidhttps://orcid.org/0000-0003-3163-5159
dc.identifier.orcidhttps://orcid.org/0000-0002-7981-6648
dc.identifier.orcidhttps://orcid.org/0000-0003-3163-5159
dc.identifier.orcidhttps://orcid.org/0000-0002-6906-9909
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5981
dc.languageEnglish
dc.language.isoen_US
dc.publisherAmerican Physical Society
dc.subjectSPIN-DEPENDENT ABSORPTION
dc.subjectALLOYS
dc.subjectFE
dc.subjectCO
dc.subjectMaterials Science, Multidisciplinary
dc.subjectPhysics, Applied
dc.subjectPhysics, Condensed Matter
dc.subjectMaterials Science
dc.subjectPhysics
dc.titleEvidence for a magnetic moment on Ir in IrMnAl from x-ray magnetic circular dichroismen_US
dc.typetext
dc.typeArticle

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