The magnetoresistance of a PrFeAsO1-xFy superconductor

被引：17
作者：
Bhoi, D. [1 ]
Chandra, L. S. Sharath [2 ]
Choudhury, P. [3 ]
Ganesan, V. [2 ]
Mandal, P. [1 ]
机构：
[1] Saha Inst Nucl Phys, Kolkata 700064, W Bengal, India
[2] UGC DAE Consortium Sci Res, Indore 452017, Madhya Pradesh, India
[3] Cent Glass & Ceram Res Inst, Kolkata 700032, W Bengal, India
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2009年 / 22卷 / 09期
关键词：
43; K; STATE; TEMPERATURE; DEPENDENCE; SPIN; GAPS;
D O I：
10.1088/0953-2048/22/9/095015
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have measured the temperature and magnetic field dependence of resistivity of polycrystalline PrFeAsO0.60F0.12 samples in the normal and superconducting state. The superconducting onset transition temperature T-c(on) shifts by similar to 4 K as H is increased from 0 to 14 T. The zero-temperature upper critical field H-c2(0) estimated by using the Ginzburg-Landau theory and the Werthamer-Helfand-Hohenberg equation exceeds 100 T. The resistivity below T-c(on) exhibits Arrhenius behavior due to thermally activated flux flow of vortices. The activation energy U-0, determined from the Arrhenius plot of the resistivity, shows a power-law decrease (U-0 alpha H-alpha) with magnetic field. The normal-state magnetoresistance varies quasilinearly with magnetic field and does not obey Kohler's rule, suggesting a multiband feature of the material.
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页数：7
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