Impact of sintering temperature on the physical properties of the superconducting ferromagnet: RuSr2Eu1.5Ce0.5Cu2O10

Authors

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

RIS ID

20095

Publication Details

Nigam, R., Pan, A. V. and Dou, S. X. (2007). Impact of sintering temperature on the physical properties of the superconducting ferromagnet: RuSr2Eu1.5Ce0.5Cu2O10. Journal of Applied Physics, 101 (9, Part 2), 09G109-1-09G109-3.

Abstract

We report the influence of the sintering temperature on the electromagnetic behavior for the RuSr₂Eu_1.5Ce_0.5Cu₂O₁₀ material, in which superconductivity and ferromagnetism coexist. The inadequate heat treatment results in the coexistence of the secondary Ru-1212 phase along with the dominant Ru-1222 phase. The presence of two phases leads to the magnetic superposition of the signals from both phases, which results in the observation of a small peak around 120–130 K. In the pure Ru-1222 no such magnetic anomaly is observed. In addition, the impure samples exhibit a double step superconductivity transition. In the normal state, these impure samples exhibit a semiconductinglike behavior of the resistivity. In contrast, the pure Ru-1222 sample with much larger, well connected grains has a single step resistivity transition, as well as a metalliclike behavior in the normal state. Our work sends a strong message that only high quality, phase pure samples can be chosen for the investigation of the complex behavior in the Ru system.

Grant Number

ARC/DP0770205

Additional Grant Number

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