کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1506416 | 993793 | 2008 | 7 صفحه PDF | دانلود رایگان |
Measurements of the complex ac susceptibility components were employed to extract inter- and intragrain superconductive transition temperatures as well as the average transition temperature of RuSr2GdCu2O8 polycrystalline superconductor. The intra- and intergranular components of the granular susceptibility components were also estimated. It was found that both the intra- and intergranular transition temperatures increase by increasing field frequencies and decrease by increasing the field amplitudes. This might be an indication that the grains of RuSr2GdCu2O8 behave differently from a homogeneous bulk superconductor. The nature of dχ′/dT curves indicated the presence of a superconducting transition between grains, coupled by weak links with a distribution of critical temperatures, and the superconducting transition within the grains. The two transitions observed are linked to the typical intra- and intergrain transitions of a granular superconductor. The weak coupling between grains might be modeled in terms of Josephson-junction arrays.
Measurements of the complex ac susceptibility components were employed to extract inter- and intragrain superconductive transition temperatures as well as the average transition temperature of RuSr2GdCu2O8 polycrystalline superconductor. The intra- and intergranular components of the granular susceptibility components were also estimated. It was found that both the intra- and intergranular transition temperatures increase by increasing field frequencies and decrease by increasing the field amplitudes. This might be an indication that the grains of RuSr2GdCu2O8 behave differently from a homogeneous bulk superconductor. The nature of dχ′/dT curves indicated the presence of a superconducting transition between grains, coupled by weak links with a distribution of critical temperatures, and the superconducting transition within the grains. The two transitions observed are linked to the typical intra- and intergrain transitions of a granular superconductor. The weak coupling between grains might be modeled in terms of Josephson-junction arrays.Figure optionsDownload as PowerPoint slide
Journal: Solid State Sciences - Volume 10, Issue 2, February 2008, Pages 198–204