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Direct evidence of the orbital contribution to the magnetic moment in AA'FeReO6 double perovskites

M. Sikora·D. Zajac·C. Kapusta·M. Borowiec·C. J. Oates·V. Prochazka·D. Rybicki·J. M. De Teresa·C. Marquina·M. R. Ibarra
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Abstract

Spin and orbital magnetic moments of Re in AA'FeReO6 double perovskites (A,A' = Ba, Sr, Ca) have been directly probed employing XMCD spectroscopy at the Re L2,3-edges. A considerable orbital magnetic moment is observed in all the studied compounds despite octahedral coordination. Relative orbital to spin contribution per Re atom rises with lattice distortion from mL/mS = -0.28 to -0.34 for AA'=Ba2FeReO6 and Ca2FeReO6, respectively. A preliminary XMCD measurements at the Fe L2,3-edges reveals also a significant orbital moment of iron in Ca2FeReO6. The relation of the results to the magnetic properties of the compounds is discussed.

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M. Sikora, D. Zajac, C. Kapusta, M. Borowiec, C. J. Oates, V. Prochazka, D. Rybicki, J. M. De Teresa, C. Marquina, M. R. Ibarra. 2005-03-15. Direct evidence of the orbital contribution to the magnetic moment in AA'FeReO6 double perovskites. https://doi.org/10.1063/1.2234292

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