Delocalization of the Cu^{2+} Unpaired Electron on the Next Nearest Ligands in Sr_2Pd_{0.99}Cu_{0.01}O_3 Ceramics

• Authors: M. Augustyniak-Jabłokow , Y. Yablokov , I. Jacyna-Onyszkiewicz , T. Ivanova , V. Shustov , V. Polovniak
• Languages of publication: EN

Abstracts

EN

Supertransferred hyperfine interactions between the Cu^{2+} unpaired electron and the ^{105}Pd nuclei in the Sr_2Pd_{0.99}Cu_{0.01}O_3 ceramic were studied by the EPR method. The spectrum of isolated -Pd-O-CuO_2-O-Pd- units (g_∥ = 2.280±0.001; g_⊥ = 2.040±0.001; A_∥(^{63}Cu) = 13 mT±0.1; A_∥(^{65}Cu) = 13.9 ±0.1 mT; A_⊥(^{63,65}Cu) = 0.0 mT) overlaps the signal from small groups of exchange coupled Cu^{2+} ions (g_∥ = 2.278±0.002; g_⊥ = 2.041±0.001). The isotropic contribution was shown to dominate in the Cu-Pd supertransferred interactions (A_∥(^{105}Pd) = A_⊥ (^{105}Pd) = 1 mT = a_{iso} Pd).

Keywords

EN

33.15.Pw; 73.20.Jc; 76.30.Fc

Discipline

• 76.30.Fc: Iron group (3d) ions and impurities (Ti-Cu)
• 33.15.Pw: Fine and hyperfine structure
• 73.20.Jc: Delocalization processes

• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 114
• Issue: 1
• Pages: 197-201

Dates

published

2008-07

received

2007-11-06

Contributors

author

M. Augustyniak-Jabłokow

• Institute of Molecular Physics, PAS, Smoluchowskiego 17, 60-179 Poznań, Poland

author

Y. Yablokov

• Institute of Molecular Physics, PAS, Smoluchowskiego 17, 60-179 Poznań, Poland

author

I. Jacyna-Onyszkiewicz

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

T. Ivanova

• Kazan Physical Technical Institute, RAS, Sibirskii trakt 10/7, 420 029 Kazan, Russia

author

V. Shustov

• Kazan Physical Technical Institute, RAS, Sibirskii trakt 10/7, 420 029 Kazan, Russia

author

V. Polovniak

• Kazan Technological Institute, Sibirskii trakt 12, 420 029 Kazan, Russia

References

• 1. S. Eggert, I. Affleck, Phys. Rev. B 46, 10866 (1992-I)
• 2. N. Motoyama, H. Eisaki, S. Uchida, Phys. Rev. Lett. 76, 3212 (1996)
• 3. O.A. Anikeenok, M.A. Augustyniak-Jabłokow, T.A. Ivanova, P. Reiche, R. Uecker, Yu.V. Yablokov, Physica B 325, 246 (2003)
• 4. Y. Nagata, T. Taniguchi, G. Tanaka, M. Satho, H. Samata, J. Alloys Comp. 346, 50 (2002)
• 5. K.M. Kojima, J. Yamanobe, H. Eisaki, S. Uchida, Y. Fudamoto, I.M. Gat, M.I. Larkin, A. Savici, Y.J. Lemura, P.P. Kyriakou, M.T. Rovers, G.M. Luke, Phys. Rev. B 70, 094402 (2004)
• 6. J. Sirker, N. Laflorencie, S. Fujimoto, S. Eggert, I. Affleck, Phys. Rev. B 98, 137205 (2007)
• 7. J. Topfer, M. Ortiz-Seidel, J.-M. Dance, J.-P. Doumerc, Eur. J. Solid State Inorg. Chem. 33, 495 (1996)
• 8. H.D. Von Wasel-Nielsen, R. Hoppe, Z. Anorg. Allg. Chem. 375, 209 (1970)
• 9. H. Kopfermann, Nuclei Moments, Academic Press, New York 1958

Identifiers

DOI

10.12693/APhysPolA.114.197