Ruthenocuprates RuSr2(Eu,Ce)2Cu2O10: Intrinsic magnetic multilayers

B.H.Frazer; D.Ariosa; D.Drobac; D.Pavuna; G.Margaritondo; H.Berger; I.Felner; I.Zivkovic; M.Onellion; M.Prester

arxiv: cond-mat/0110181 · v1 · submitted 2001-10-09 · ❄️ cond-mat.supr-con · cond-mat.str-el

Ruthenocuprates RuSr2(Eu,Ce)2Cu2O10: Intrinsic magnetic multilayers

I.Zivkovic , Y.Hirai , B.H.Frazer , M.Prester , D.Drobac , D.Ariosa , H.Berger , D.Pavuna

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G.Margaritondo I.Felner M.Onellion

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords magneticdynamicsru-1222dataexhibitru-1212rusrsrruo

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We report ac susceptibility data on RuSr_2(Eu,Ce)_2Cu_2O_(10-y) (Ru-1222, Ce content x=0.5 and 1.0), RuSr_2GdCu_2O_8 (Ru-1212) and SrRuO_3. Both Ru-1222 (x=0.5, 1.0) sample types exhibit unexpected magnetic dynamics in low magnetic fields: logarithmic time relaxation, switching behavior, and `inverted' hysteresis loops. Neither Ru-1212 nor SrRuO_3 exhibit such magnetic dynamics. The results are interpreted as evidence of the complex magnetic order in Ru-1222. We propose a specific multilayer model to explain the data, and note that superconductivity in the ruthenocuprate is compatible with both the presence and absence of the magnetic dynamics.

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Ruthenocuprates RuSr2(Eu,Ce)2Cu2O10: Intrinsic magnetic multilayers

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