کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1818587 | 1525749 | 2011 | 4 صفحه PDF | دانلود رایگان |
We investigated the anisotropy dependence of the characteristic fields of the second peak magnetization, specifically, the onset field Bon and the peak field Bsp, in Y1−xPrxBa2Cu3O7−δ single crystals. The empirical dependence arising from data analysis suggests a logarithmic dependence of both these fields on the anisotropy factor γ which disagrees with the universal scaling law γ2B=F(t)γ2B=F(t) proposed previously. We attribute the faster decrease of the two fields at high anisotropy to the dramatic changes in the magnetic state of the system which starts to display a noticeable paramagnetic contribution at high Pr-doping, hence high anisotropy. The incipient phase separation could also reduce the elastic properties of the flux line lattice which determines onset of the second peak magnetization.
Research highlights
► Anisotropy γ dependence of the characteristic fields of Y1−xPrxBa2Cu3O7 is presented.
► The fields follow a logarithmic dependence on γ with the same scaling parameter.
► The faster decrease of the two fields at high γ could be due to the changes in the magnetic state of the system.
Journal: Physica C: Superconductivity - Volume 471, Issues 5–6, March 2011, Pages 133–136