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Causa, M. T.; Fainstein, C.; Nieva, G.; S\'anchez, R.; Steren, L. B.; Tovar, M.; Zysler, R.; Vier, D. C.; Schultz, S.; Oseroff, S. B.; Fisk, Z.; Smith, J. L. |
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Crystal-field interaction in the GdxEu1-xBa2Cu3O7-? superconductors |
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Year |
1988 |
Publication |
Physical Review B |
Abbreviated Journal |
Phys. Rev. B |
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38 |
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257-261 |
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Abstract |
We report here experimental data on the crystal-field interaction of gadolinium ions with their environment in GdxEu1-xBa2Cu3O7-?. The ESR spectrum and a Schottky anomaly in the specific heat of dilute samples (x?1) indicate the existence of a crystal-field splitting of the 8S7/2 ground state of Gd3+ ions of about 1.5 K. We discuss the parametrization of the measured splitting in terms of an effective Hamiltonian, and the microscopic origin of the interaction within the framework of a superposition model. Since the single-ion energies involved are of the same order of magnitude as the energies associated with the magnetic ordering of the Gd3+ moments in GdBa2Cu3O7-? (TN?2.24 K), we analyze the effects of the crystal-field interaction on the magnetic transition. |
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BT @ gnieva @ |
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433 |
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Author |
Causa, M.T.; Fainstein, C.; Nieva, G.; Sánchez, R.; Steren, L. B.; Tovar, M.; Zysler, R.; Vier, D. C.; Schultz, S.; Oseroff, S. B.; Fisk, Z.; Smith, J. L. |
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Title |
Crystal Field Interaction and Magnetic Order in GdBa2Cu3O7 |
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Book Chapter |
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Year |
1988 |
Publication |
Progress in High Temperature Superconductivity |
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5 |
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World Scientific |
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N.J. |
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J. L. Heiras |
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978-9971505837 |
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430 |
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