Ruthenocuprates: Intrinsic magnetic multilayers

2001/07/18 by I. Zivkovic, Ivica Živković, Zivkovic, I. +18
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/0107388

4 pages, 4 figures; submitted to Phys.Rev.Lett. Some technical errors corrected

openalex publication_date 2001/07/18 · arxiv created 2001/07/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report ac susceptibility measurements on polycrystalline samples of SrRuO₃ and three ruthenocuprates: superconducting RuSr₂GdCu₂O₈ (Ru-1212), superconducting RuSr₂Eu_(2-x)Ce_xCu₂O_y (Ru-1222, x=0.5) and nonsuperconducting, insulating RuSr₂Eu_(2-x)Ce_xCu₂O_z (Ru-1222, x=1.0). Ac susceptibility of both Ru-1222 compositions exhibit logarithmic time relaxation and `inverted' hysteresis loops. Ru-1212 samples exhibit none of these behaviors. We interpret the magnetic behavior of Ru-1222 in the framework of weakly coupled magnetic multilayers and argue that superconductivity coexists with qualitatively different magnetic behaviors.

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