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29 March 2024
 
  » arxiv » cond-mat/0503358

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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 ;
Date 15 Mar 2005
Subject Strongly Correlated Electrons; Materials Science | cond-mat.str-el cond-mat.mtrl-sci
AbstractSpin 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.
Source arXiv, cond-mat/0503358
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