NMR study of A(2)FeMO(6) (A = Ca, Sr, Ba, M = Mo, Re) double perovskites

Cz. Kapusta, D. Zajac, P. C. Riedi, M. Sikora, C. J. Oates, J. Blasco, M. R. Ibarra

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Abstract

A nuclear magnetic resonance study of the A(2)FeMO(6) ( A = Ba, Sr, Ca; M = Mo, Re) double perovskites is reported. Spin echo spectra have been measured at 4.2 K and zero external magnetic field. Resonant signals at Mo nuclei are observed at 30 - 80 MHz and at 750 - 1000 MHz for Re nuclei. Frequencies of the main lines correspond to Mo hyperfine fields of 19, 24 and 23 T and to Re hyperfine fields of 84, 94 and 95T for Ba, Sr and Ca compounds, respectively. From these data the values of Mo and Re magnetic moments are derived and the relation to the results of theoretical calculations is discussed. (C) 2003 Elsevier B. V. All rights reserved.

Original languageEnglish
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume272
DOIs
Publication statusPublished - May 2004

Keywords

  • nuclear magnetic resonance
  • colossal magnetoresistance
  • perovskites

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