| Records |
| Author |
Tovar, M.; Sereni, J.G.; Pedrazzini, P.; Caneiro, A.; Prado, F.; Butera, A.; Causa, M.T. |
| Title |
Magnetization and specific heat of La doped Sr2FeMoO6 |
Type |
Journal Article |
| Year |
2004 |
Publication |
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS |
Abbreviated Journal |
J. Magn. Magn. Mater. |
| Volume |
272 |
Issue |
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Pages |
857-858 |
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| Abstract |
We present high-temperature magnetization and low-temperature specific heat measurements performed on the electron doped double perovskite Sr1.7La0.3FeMoO6. We have obtained the electronic contribution to C-p, gamma = 11.5(5) mJ/mol K-2. The electronic susceptibility, derived from the magnetic measurements in the paramagnetic regime (T > T-c = 390K), was chi(e)(0) =(4.9 +/- 1.5) x 10(-4) emu/mol. Anti ferromagnetic coupling between localized and itinerant moments was inferred from the data, with a coupling constant lambda = -(475 +/- 50)mol/emu, that results in a ferromagnetic-like Curie-Weiss susceptibility with Theta = 390(5) K. These results are compared with those obtained for the undoped material. (C) 2003 Published by Elsevier B.V. |
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0304-8853 |
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ISI:000222236700045 |
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BT @ hernan @ |
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63 |
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Causa, M.T.; Dutrus, S.M.; Fainstein, C.; Nieva, G.; Sanchez, R.; Steren, L.B.; Tovar, M.; Zysler, R.; Oseroff, S.B.; Vier, D.C.; Schultz, S.; Fisk, Z.; Smith, J.L. |
| Title |
Magnetic ordering in dilute GdxEu1−xBa2Cu3O7−δ superconductors |
Type |
Journal Article |
| Year |
1988 |
Publication |
Physica C: Superconductivity |
Abbreviated Journal |
Physica C |
| Volume |
153 |
Issue |
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Pages |
188-189 |
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| Abstract |
We have measured the specific heat of GdxEu1−xBa2Cu3O7−δ (0 ≤ × ≤ 1). The data show a λ-type anomaly at high concentrations and a broad Schottky type anomaly at intermediate and low concentrations. We compare this behavior with theoretical predictions for a 2-dimensional Ising system. |
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BT @ gnieva @ |
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432 |
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Sanchez, R.D.; Causa, M.T.; Sereni, J.G.; Vallet-Regi, M.; Sayaguez, M.J.; Gonzalez-Calbet, J.M. |
| Title |
Specific heat, magnetic susceptibility and electrical resistivity measurements on LaNiO3 |
Type |
Journal Article |
| Year |
1993 |
Publication |
Journal of Alloys and Compounds |
Abbreviated Journal |
J. Alloys Compd. |
| Volume |
191 |
Issue |
2 |
Pages |
287–289 |
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Measurements of specific heat, magnetic susceptibility and electrical resistivity on LaNiO3 are reported. No evidence of magnetic ordering or metal-insulator transitions is found. From the measured electronic specific heat parameter γ and the Pauli susceptibility χP, a Stoner enhancement parameter is derived. Comparison with band structure calculations performed by other workers is also made. |
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no |
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BT @ pedrazp @ |
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691 |
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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. |
| Title |
Crystal Field Interaction and Magnetic Order in GdBa2Cu3O7 |
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Book Chapter |
| 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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no |
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BT @ gnieva @ |
Serial |
430 |
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