2003/04/07 by Y. Y. Xue, Feng Chen, F. Chen +3 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.67.224511
6 pages, 3 figures
arxiv created 2003/04/07 · openalex publication_date 2003/06/19 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
The macroscopic magnetizations of Ru_1\ensuremath-xCuxSr2EuCu2O_8+\ensuremathδ with x between 0 and 0.15 were investigated. A ferromagnetlike transition as well as an antiferromagnetlike transition appear around TM in the low-field magnetization and around TAM in the high-field differential susceptibility, respectively. The separation between them, which is accompanied by a flat plateau in the magnetic Cp, increases with x. Superparamagnetic M(H) and slow spin dynamics, i.e., characteristics of nanomagnetic clusters, were observed far above TM. A comparison with RuSr2(Eu_1\ensuremath-yCey)Cu2O_10+\ensuremathδ and some manganites further suggests that a phase separation occurs, which can describe well the conflicting magnetic-superconductivity data previously reported.