Low temperature magnetic transition in RuSr2EuCeCu2O10 ruthenocuprate

I. Zivkovic; D. Pajic; K. Zadro

doi:10.1016/j.physc.2006.11.010

Low temperature magnetic transition in RuSr2EuCeCu2O10 ruthenocuprate

Strongly Correlated Electrons 2015-06-25 v1 Materials Science

Authors: I. Zivkovic , D. Pajic , K. Zadro

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Abstract

A new magnetic transition in the ruthenocuprate parent compound RuSr2EuCeCu2O10 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 RuSr2Eu1.1Ce0.9Cu2O10 composition showed no evidence of the similar transition, which points to a possible intrinsic behavior.

Keywords

magnetic transition ruthenocuprate ac susceptibility frequency dependence Arrhenius law superparamagnetic particles

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@article{arxiv.cond-mat/0611579,
  title  = {Low temperature magnetic transition in RuSr2EuCeCu2O10 ruthenocuprate},
  author = {I. Zivkovic and D. Pajic and K. Zadro},
  journal= {arXiv preprint arXiv:cond-mat/0611579},
  year   = {2015}
}

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to be published in Physica C

Low temperature magnetic transition in RuSr2EuCeCu2O10 ruthenocuprate

Abstract

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