Comparative study of magnetic behavior of RuSr2RE1.5Ce0.5Cu2O10-δ where RE=Eu and Sm

Authors

Rashmi Nigam, University of WollongongFollow
Alexey V. Pan, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

31467

Publication Details

Nigam, R., Pan, A. V. Dou, S. Xue. (2009). Comparative study of magnetic behavior of RuSr₂RE_1.5Ce_0.5Cu₂O_10-δ where RE=Eu and Sm. International Journal of Modern Physics B, 23 (17), 3486-3491.

Abstract

Systematic investigation of structural, magnetic and transport properties of RuSr₂RE_2-xCe_xCu₂O₁₀ with RE being Sm and Eu has been performed. We present the experimental evidence that the synthesis of RuSr₂Eu_1.5Ce_0.5Cu₂O₁₀ under non-optimised heat treatment conditions may results in the formation of secondary RuSr₂EuCu₂O₈ phase. In contrast, similar preparation conditions for RuSr₂Sm_1.5Ce_0.5Cu₂O₁₀ samples lead to the pure phase. Consequently, RuSr₂Eu_1.5Ce_0.5Cu₂O₁₀ samples exhibit a small peak around 125 K in the temperature dependence of dc magnetization, pronounced irreversibility between zero-field cooled and field cooled curves at temperatures higher than the peak temperature, and the bell shaped behavior of the coercive field as the function of temperature above Curie's temperature. These anomalous features, which may arise due to the superposition effect of the main and secondary phases, which are both magnetic, are completely absent for RuSr₂Sm_1.5Ce_0.5Cu₂O₁₀ sample, which does not consist of the secondary phase.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205