Hostname: page-component-669899f699-2mbcq Total loading time: 0 Render date: 2025-05-05T20:12:24.716Z Has data issue: false hasContentIssue false
  • English
  • Français

An Tiferro Magnetic-Ferromagnetic Cu-O-Cu Coupljng Change in Copper Oxides: Se1-xTexCuO3 Perovskites

Published online by Cambridge University Press:  16 February 2011

M. A. Subramanian  and
A. P. Ramirez
M. A. Subramanian
Affiliation:
DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880-0328
A. P. Ramirez
Affiliation:
Bell Laboratories, Lucent Technologies, 600 Mountain Avenue Murray Hill, NJ 07974-0636
Get access

Abstract

Se1-xTeCuO3 (O≤x<1) phases crystallizing in perovskite structure with divalent copper at the octahedral sites have been characterized by x-ray diffraction, magnetization measurements and specific heat. The perovskites are unusual for possessing an extremely small A-site cation (Se4+, Te4+) with Cu-O-Cu bond angles in the range 120-130°. A continuous evolution in both structural and bulk properties is observed between the ferromagnetic (FM) ground state for x = 0 and an antiferromagnetic (AF) state for x = 1. The correlation of structural and magnetic properties allows the first determination of the Cu-O-Cu bond angle where the superexchange interaction sign changes, providing a quantitative realization of the Anderson-Goodenough-Kanemori rules for copper-oxide compounds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 547: Symposium DD – Solid-State Chemistry of Inorganic Materials II , 1998 , 169
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1. Beyers, R. and Shaw, T. M., Solid State Physics, 42, Eds. Ehrenreich, H. and Turnbull, D., Academic Press, 1989, pp. 91–212 Google Scholar
2. Ramirez, A. P., J. Phys. Condens. Matter 9, 8171 (1997).Google Scholar
3. Kramers, H. A., Physica, 1, 182 (1934).Google Scholar
4. Anderson, P. W., Phys. Rev. 79, 705 (1950).Google Scholar
5. Goodenough, J. B., Phys. Rev. 100, 564 (1955).Google Scholar
6. Kanemori, J., J. Phys. Chem. Solids, 10, 87 (1959).Google Scholar
7. Khomskii, D.I. and Kugel, K. I., Solid State Commun., 13, 763 (1973)Google Scholar
8. Mizuno, F., Masuda, H., Hirabayashi, I., Tanaka, S., Hasegawa, M. and Mizutani, U., Nature, 345, 788 (1990).Google Scholar
9. Shengelaya, A., Meijer, G. I., Karpinski, J., Zhao, G., Schwer, H., Kopnin, E. M., Rossel, C., and Keller, H., Phys. Rev. Lett., 80, 3626 (1998).Google Scholar
10. Kohn, K., Inoue, K., Horie, O., and Akimoto, S., J. Solid State Chem., 18, 27 (1976).Google Scholar
11. Subramanian, M. A., Toby, B. H., Ramirez, A. P., Marshall, W. J., Sleight, A. W., and Kwei, G. H., Science, 273, 81 (1996).Google Scholar
12. Philippot, E. and Maurin, M., Rev. Chim. Minèr. 13, 162 (1976).Google Scholar
13. Data for the single-crystal, X-ray structure determination were collected with an EnrafNonius CAD4 X-ray diffractometer equipped with a monochromatic Mo Kα source. Orthorhombic cell parameters for both samples were indexed from twenty five diffraction maxima. Intensity data sets were then collected using pure ω-scans over a full sphere of reflections. The structures were refined in space group Pnma (No. 62) by full-matrix least-squares refinement. Biweights were used in the final refinement where Rw = [∑W(|Fo| - |Fc|)2/∑W|Fo|2]1/2 with w proportional to [s2(I) + 0.000912]-1/2 Atomic scattering factors were taken from the International Tables for X-Ray Crystallography, Vol. IV, including the anomalous terms for Te, Se and Cu. The final R factors are 0.029 and 0.025 for Se0.6Te0.4CuO3 and TeCuO3 respectively. The final positional parameters for Se0.6Te0.4CuO3 are (Se,Te), x = 0.0216(5), y = 0.25, z = 0.0324(5); Cu, x = 0.0, y = 0.0, z = 0.50; 0(1); 0(1), x- 0.0607(6); y = 0.25; z = 0.333(1); 0(2), x = 0.1986(10); y = 0.0657(9); z = -0.095(1). We have re-refined the structure of TeCuO3 to obtained more accurate bond distances and bond angles given in Ref 12. Further details on the structure determination of these phases will be published elsewhere.Google Scholar