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- Title
EXCHANGE BIAS EFFECT IN RuSr<sub>2</sub>GdCu<sub>2</sub>O<sub>8</sub>/La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> COMPOSITES.
- Authors
Flórez, M. A.; Ortiz, M. C. Reyes; Jurelo, A. R.; Téllez, D. A. Landínez; Roa-Rojas, J.
- Abstract
We report the synthesis and characterization of RuSr2GdCu2O 8-La0.67Sr0.33MnO3 superconductingmagnetic composites with 0 to 50 wt% of La0.67Sr0.33MnO3 in the composites. Systematic measurements of magnetization as a function of applied magnetic field at up 5 kOe were performed at temperature regimes below the Curie temperature (TC) of La0.67Sr0.33MnO3 but above the Néel temperature (TN) of RuSr2GdCu2O8; below TN of RuSr2GdCu2O8 but above the superconducting critical temperature (TSC) of RuSr2GdCu2O8; and below TSC of RuSr2GdCu2O8. Our results reveal the ferromagnetic character of the composites at the temperature regime TN < T < TC. Exchange bias effect was observed for weak applied fields (H <1.5 kOe) at the temperature regime TSC < T< TN. At the superconducting temperature regime (T<TSC) weaker exchange bias is observed for low magnetic fields (H < 0.6 kOe). For strong magnetic fields (H> 2 kOe) the ferromagnetic character of the system is recovered.
- Subjects
COMPOSITE materials; MAGNETIZATION; MAGNETIC fields; FERROMAGNETISM; MANGANITE; SUPERCONDUCTIVITY
- Publication
Revista Colombiana de Física, 2007, Vol 39, Issue 1, p179
- ISSN
0120-2650
- Publication type
Article