On the dc Magnetization, Spontaneous Vortex State and Specific Heat in the superconducting state of the weakly ferromagnetic superconductor RuSr$_{2}$GdCu$_{2}$O$_{8}$

Simple item page
dc.creatorPapageorgiou, Thomas P.
dc.creatorCasini, Ennio
dc.creatorBraun, Hans F.
dc.creatorHerrmannsdörfer, Thomas
dc.creatorBianchi, Andrea D.
dc.creatorWosnitza, Joachim
dc.date2005-11-14
dc.date.accessioned2026-07-07T06:46:05Z
dc.date.available2026-07-07T06:46:05Z
dc.descriptionMagnetic-field changes $<$ 0.2 Oe over the scan length in magnetometers that necessitate sample movement are enough to create artifacts in the dc magnetization measurements of the weakly ferromagnetic superconductor RuSr$_{2}$GdCu$_{2}$O$_{8}$ (Ru1212) below the superconducting transition temperature $T_{c} \approx$ 30 K. The observed features depend on the specific magnetic-field profile in the sample chamber and this explains the variety of reported behaviors for this compound below $T_{c}$. An experimental procedure that combines improvement of the magnetic-field homogeneity with very small scan lengths and leads to artifact-free measurements similar to those on a stationary sample has been developed. This procedure was used to measure the mass magnetization of Ru1212 as a function of the applied magnetic field H (-20 Oe $\le$ H $\le$ 20 Oe) at $T < T_{c}$ and discuss, in conjunction with resistance and ac susceptibility measurements, the possibility of a spontaneous vortex state (SVS) for this compound. Although the existence of a SVS can not be excluded, an alternative interpretation of the results based on the granular nature of the investigated sample is also possible. Specific-heat measurements of Sr$_{2}$GdRuO$_{6}$ (Sr2116), the precursor for the preparation of Ru1212 and thus a possible impurity phase, show that it is unlikely that Sr2116 is responsible for the specific-heat features observed for Ru1212 at $T_{c}$.
dc.description17 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0511323
dc.identifierhttp://arxiv.org/abs/cond-mat/0511323
dc.identifierEuropean Physical Journal B 52, 383 (2006)
dc.identifierdoi:10.1140/epjb/e2006-00317-4
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/103226
dc.subjectSuperconductivity
dc.titleOn the dc Magnetization, Spontaneous Vortex State and Specific Heat in the superconducting state of the weakly ferromagnetic superconductor RuSr$_{2}$GdCu$_{2}$O$_{8}$
dc.typetext

Files

Collections

arXiv