Hall effect of K-doped BaFe2As2 superconducting thin films

被引：2
作者：
Son, Eunseon [1 ]
Lee, Nam Hoon [1 ]
Hwang, Tae-Jong [2 ]
Kim, Dong Ho [2 ]
Kang, Won Nam [1 ]
机构：
[1] Sungkyunkwan Univ, Dept Phys, Suwon, South Korea
[2] Yeungnam Univ, Dept Phys, Gyongsan, South Korea
来源：
PROGRESS IN SUPERCONDUCTIVITY AND CRYOGENICS | 2013年 / 15卷 / 03期
关键词：
Hall effect; K-doped BaFe2As2; superconducting thin film;
D O I：
10.9714/psac.2013.15.3.005
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have studied Hall effect for potassium (K)-doped BaFe2As2 superconducting thin films by analyzing the relation between the longitudinal resistivity (rho(xx)) and the Hall resistivity (rho(xy)). The thin films used in this study were fabricated on Al2O3 (000l) substrates by using an ex-situ pulsed laser deposition (PLD) technique under a high-vacuum condition of similar to 10(-6) Torr. The samples showed the high superconducting transition temperatures (T-c) of similar to 40 K. The rho(xx). and the rho(xy). for K-doped BaFe2As2 thin films were measured by using a physical property measurement system (PPMS) with a temperature sweep (T-sweep) mode at an applied current density of 100 A/cm(2) and at magnetic fields from 0 up to 9 T. We report the T-sweep results of the rho(xy). and the rho(xy). to investigate Hall scaling behavior on the basis of the relation of rho(xy). = A rho(beta)(xx). The beta values are 3.0 +/- 0.2 in the c-axis-oriented K-doped BaFe2As2 thin films, whereas the thin films with various oriented-directions like a polycrystal showed slightly lower beta than that of c-axis-oriented thin films. Interestingly, the beta value is decreased with increasing magnetic fields.
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页码：5 / 8
页数：4
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