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Local Moment of Ir in Fe, Co and Ni Hosts Probed by Ir L 2,3 Edge X-Ray Magnetic Circular Dichroism

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Abstract

The formation of an induced 5d magnetic moment on Ir in Fe97Ir3, Co95Ir5 and Ni95Ir5 alloys has been investigated by X-ray magnetic circular dichroism (XMCD) and X-ray absorption spectra (XAS) measurements at Ir L 2,3 edges. Using a sum rule which relates the integrals of these spectra with the ground state expectation value of the orbital angular momentum 〈L Z 〉 of the probed atom, the orbital moment m orb of Ir could be determined as −0.071(2) μ B in an Fe host, −0.067(2) μ B in a Co host and −0.041(1) μ B in a Ni host. The spin magnetic moment m spin of Ir is also found to be the maximal in Fe and the minimal in Ni. The total moment of Ir is found to be approximately 1/5 of total moment of Fe, 2/13 of the total moment of Co, and 1/4 of the total moment of Ni.

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Authors and Affiliations

  1. Harima Institute/SPring8, RIKEN, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo, 679-5148, Japan

    V. V. Krishnamurthy & T. Ishikawa

  2. Japan Synchrotron Radiation Institute/SPring8, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo, 679-5198, Japan

    M. Suzuki, N. Kawamura & T. Ishikawa

  3. Himeji Institute of Technology, Kamigori, Ako, Hyogo, 678-1297, Japan

    Y. Kohori

Authors
  1. V. V. Krishnamurthy
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  2. M. Suzuki
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  3. N. Kawamura
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  4. T. Ishikawa
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  5. Y. Kohori
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Krishnamurthy, V.V., Suzuki, M., Kawamura, N. et al. Local Moment of Ir in Fe, Co and Ni Hosts Probed by Ir L 2,3 Edge X-Ray Magnetic Circular Dichroism. Hyperfine Interactions 136, 361–365 (2001). https://doi.org/10.1023/A:1020537809464

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  • DOI: https://doi.org/10.1023/A:1020537809464

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