Abstract.
The spin-states of cobalt based perovskite compounds depend sensitively on the valence state and local crystal environment of Co ions and the rich physical properties arise from strong coupling among charge, spin, and orbital degrees of freedom. While extensive studies have been carried out in the past, most of them concentrated on the isotropic compound LaCoO3. In this paper, using the unrestricted Hartree-Fock approximation and the real-space recursion method, we have investigated the competition of various magnetically ordered spin-states of anisotropic double-layered perovskite Sr2Y0.5Ca0.5Co2O7. The energy comparison among these states shows that the nearest-neighbor high-spin-intermediate-spin ferromagnetically ordered state is the relevant magnetic ground state of the compound. The magnetic structure and sizes of magnetic moments are consistent with the recent experimental observation.
Similar content being viewed by others
References
R.R. Heikes, R.C. Miller, R. Mazelsky, Physica 30, 1600 (1964)
G.H. Jonker, J. Appl. Phys. 37, 1424 (1966)
P.M. Raccah, J.B. Goodenough, J. Appl. Phys. 39, 1209 (1967)
C.N.R. Rao, M. Seikh, C. Narayana, Topics in current chemistry 234, 1 (2004)
J. Zaanen, G.A. Sawatzky, J. Solid State Chem. 88, 8 (1990)
A. Chainani, M. Mathew, D.D. Sarma, Phys. Rev. B 46, 9976 (1992)
L. Sudheendra, M. Seikh, A.R. Raju, C. Narayana, Chem. Phys. Lett. 340, 275 (2001)
O. Toulemonde, N. N'Guyen, F. Studer, A. Traverse, J. Solid State Chem. 158, 208 (2001)
S. Yamaguchi, H. Taniguchi, H. Takagi, T. Arima, Y. Tokura, J. Phys. Soc. Jpn. 54, 1885 (1995)
G. Briceno, H. Chang, X. Sun, P. G. Schultz, X. D. Xiang, Science 270, 273 (1995)
V. Golovanov, L. Mihaly, A. R. Moodenbaugh, Phys. Rev. B 53, 8207 (1996)
S. Balamurugan, M. Xu, E. Takayama-Muromachi, J. Solid State Chem. 178, 3431 (2005)
P. Ravindran, P. A. Korzhavyi, H. Fjellvag, A. Kjekshus, Phys. Rev. B 60, 16423 (1999)
M. Zhuang, W.Y. Zhang, T. Zhou, N.B. Ming, Phys. Lett. A 255, 354 (1999)
Y. Furukawa, S. Wada, Y. Yamada, J. Phys. Soc. Jpn 62, 1127 (1993)
Y. Moritomo, K. Migashi, K. Matsuda, A. Nakamura, Phys. Rev. B 55, 14725 (1997)
K. Yamaura, D.P. Young, R.J. Cava, Phys. Rev. B 63, 064401(2001)
O.H. Hansteen, J. Solid State Chem. 141, 212 (1998)
K. Takada, H. Sakurai, E. Takayama-Muromachi, F. Izumi, R.A. Dilanian, T. Sasaki, Nature (London) 422, 53 (2003)
G. Baskaran, Phys. Rev. Lett. 91, 97003 (2003)
R.E. Schaak, T. Klimczuk, M.L. Foo, R.J. Cava, Nature 424, 527 (2003)
T. Mizokawa, A. Fujimori, Phys. Rev. B 54, 5368 (1996)
S.V. Streltsov, A.S. Mylnikova, A.O. Shorikov, Z.V. Pchelkina, D.I. Khomskii, V.I. Anisimov, Phys. Rev. B 71, 245114 (2005)
R.O. Kuzian, A.M. Dar, P. Sati, R. Hayn, Phys. Rev. B 74, 155201 (2006)
J.C. Slater, G.F. Koster, Phys. Rev 94, 1498 (1954)
Mark S. Hybertsen, E.B. Stechel, W. M. C. Foulkes, M. Schlter, Phys. Rev. B 45, 10032 (1992)
V. Heine, R. Haydock, M.J. Kelly, in Solid State Physics: Advances in Research and Applications, edited by H. Ehrenreich, F. Seitz, D. Turnbull (Academic, New York, 1980), Vol. 35, p. 215.
R. Haydock, C.M.M. Nex, J. Phys. C 17, 4783 (1984)
D.D. Sarma, N. Shanthi, S.R. Barman, N. Hamada, H. Sawada, K. Terakura, Phys. Rev. Lett. 75, 1126 (1995)
W.A. Harrison, in Electronic Structure and the Properties of Solids (W.H. Freeman and Company, San Francisco, 1980)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
He, H., Zhang, W. Study on the spin-states of cobalt-based double-layer perovskite Sr2Y0.5Ca0.5Co2O7 . Eur. Phys. J. B 61, 457–463 (2008). https://doi.org/10.1140/epjb/e2008-00100-7
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjb/e2008-00100-7