Low temperature magnetic transition in RuSr2EuCeCu2O10 ruthenocuprate

✍ Scribed by I. Živković; D. Pajić; K. Zadro

• Book ID: 104082654
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 257 KB
• Volume: 452
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2006.11.010

✦ Synopsis

A new magnetic transition in the ruthenocuprate parent compound RuSr 2 EuCeCu 2 O 10 has been observed below 10 K. It shows up only as a kink in the imaginary part of the ac susceptibility and exhibits a pronounced frequency dependence. At the same time, the real part of the ac susceptibility and the dc magnetization study show very little change in the same temperature window suggesting only a minor fraction of the material to be involved in the transition. Frequency dependence shows excellent agreement with the predictions of the Arrhenius law known to describe well the dynamics of the superparamagnetic particles. The same type of the investigation on the RuSr 2 Eu 1.1 Ce 0.9 Cu 2 O 10 composition showed no evidence of the similar transition, which points to a possible intrinsic behavior.