Abstract
The57Co emission Mössbauer spectra from YBa2Cu3O6.92 (1-2-307) and YBa2Cu3O6.00 (1-2-306) have been measured and compared with the57Fe absorption spectra from YBa2Cu2.95Fe0.05O7−δ in order to clarify decisively the site assignments for the57Fe quadrupole-split doublets in these compounds. Mössbauer spectra obtained from both specimens consist of four components whose hyperfine interaction parameters well agree with each other. It is shown that the Co and Fe atoms mainly substitute at Cu1 chain sites in 1-2-307, but in 1-2-306 the Co atoms occupy randomly the Cu2 plane sites and indicate magnetically-split sextet which converts to a paramagnetic doublet of S-state Fe3+ in 1-2-307 by a post-annealing in O2 gas.
Similar content being viewed by others
References
S. Nasu, H. Kitagawa, T. Kohara, Y. Oda, T. Shinjo, K. Asayama and F.E. Fujita,Proc. of JIMIS-5 Suppl. to Trans. JIM 29 (1988) 543.
S. Nasu, H. Kitagawa, T. Kohara, Y. Oda, T. Shinjo, K. Asayama and F.E. Fujita, MRS Int'l. Mtg. on Adv. Mats. 6 (1989) 635.
E. Baggio-Saitovitch, I. Souza Azevedo, R.B. Scorzelli, H. Saitovitch, S.F. da Cunha, A.P. Guimaraes, P.S. Silva and A.Y. Takeuchi, Phys. Rev. B 37 (1988) 7967.
V. Sedykh, S. Nasu and F.E. Fujita, Solid State Comm. 67 (1988) 1063.
B.D. Dunlap, J.D. Jorgensen, W.K. Kwok, C.W. Kimball, J.L. Matykiewicz, H. Lee and C.U. Segre, Physica C 153–155 (1988) 1100.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Nasu, S., Yoshida, M., Oda, Y. et al. 57Fe and57Co Mössbauer studies of highT c Y-Ba-Cu oxides. Hyperfine Interact 66, 417–421 (1991). https://doi.org/10.1007/BF02395895
Issue Date:
DOI: https://doi.org/10.1007/BF02395895