Hall effect and magnetization in the magnetic superconductor RuSr2GdCu2O8

Magnetic, electrical and structural properties of the new Re-doped ruthenocuprate Ru1-xRexSr2GdCu2Oy

“…However, this scheme has an exception at 9 % Re: ZFC and FC branches approach each other noticeably, even overlapping at temperatures under 10 K. This effect is similar to the application of strong magnetic fields, which results in the suppression of the irreversibility [4]. Reduction in the irreversibility suggests a lower cationic disorder, as well as a decrease in the long range weak ferromagnetic order [27], since the irreversibility is attributed to the Ru sublattice.…”

“…The discovery of superconductivity in the ruthenocuprates RuSr 2 GdCu 2 O 8 (Ru1212) and RuSr 2 (R 1+x Ce 1−x )Cu 2 O 10 (R=Sm, Eu and Gd) by Bauernfeind et al in 1995 [1], and the report, two years later, by Felner et al [2] of the coexistence of superconductivity and magnetism in these compounds renewed the interest of both theoreticians and experimentalists, in the study of the interplay between superconductivity and magnetism [3,4,5,6,7,8].…”

Magnetoresistance in the magnetic and superconducting phases of RuSr2GdCu2O8

“…The inset of Fig. 1 enlarges the region of the transition, and shows the huge effect produced by the small field m 0 H ¼ 0.3 T, that pushes the zero-resistance temperature down to 15 K. Prior magnetization and Hall effect experiments showed that the magnetic ordered state is established at T N ¼ 133 K [9]. Giant magnetoresistance effects are observed in the region of the superconducting transition.…”

“…The sample was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and magnetic measurements [9]. XRD confirms that the sample is single phase and SEM reveals a typical granular morphology with average grain size of 5 mm.…”