Mössbauer spectroscopy of CuO and its relevance to high-temperature superconductors

M. G. Smith*, R. D. Taylor, M. P. Pasternak, H. Oesterreicher

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Mössbauer emission spectroscopy and magnetic susceptibility studies were performed on doped57 antiferromagnetic CuO. Magnetic susceptibility data show that antiferromagnetic ordering occurs at TN=225 K and that the Co dopant (10 100 ppm) does not influence the bulk magnetic properties of CuO. Mössbauer spectra recorded at T>244 K show a dominant quadrupole-split site and two minor impurity sites. At T=244 K, a line broadening of the dominant site is observed indicating the onset of local magnetic order. The hyperfine interaction parameters at T<TN were determined. In particular, the sign and the asymmetry parameter of the electric-field gradient (Vzz) and the angle formed by Vzz and magnetic hyperfine field were derived. We find to be very small (0.09) and 21° 28°. The value of is in accord with neutron-diffraction results. The Fe57 Mössbauer spectroscopy of CuO is discussed in relation to other copper oxides and Fe containing perovskites.

Original languageEnglish
Pages (from-to)2188-2192
Number of pages5
JournalPhysical Review B-Condensed Matter
Issue number4
StatePublished - 1990


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