| Hauptseite > Publikationsdatenbank > Mixed-state Hall effect and flux pinning in Ba (Fe1-xCox) 2As2 single crystals (x = 0.08 and 0.10) > print |
| 001 | 15732 | ||
| 005 | 20250129094324.0 | ||
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| 082 | _ | _ | |a 530 |
| 084 | _ | _ | |2 WoS |a Physics, Condensed Matter |
| 100 | 1 | _ | |0 P:(DE-HGF)0 |a Wang, L.M. |b 0 |
| 245 | _ | _ | |a Mixed-state Hall effect and flux pinning in Ba (Fe1-xCox) 2As2 single crystals (x = 0.08 and 0.10) |
| 260 | _ | _ | |a College Park, Md. |b APS |c 2011 |
| 300 | _ | _ | |a 134506 |
| 336 | 7 | _ | |a Journal Article |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |
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| 336 | 7 | _ | |a article |2 DRIVER |
| 440 | _ | 0 | |0 4919 |a Physical Review B |v 83 |x 1098-0121 |y 13 |
| 500 | _ | _ | |a The authors thank the National Science Council of Taiwan for financial support under Grants No. NSC 98-2112-M-212-001-MY3 (L. M. W.), No. NSC 96-2739-M-213-001, and No. NSC 96-2112-M-007-012 (L.J.C.). T. W. and P. A. acknowledge financial support through the Deutsche Forschungsgemeinschaft (SPP 1458). |
| 520 | _ | _ | |a Longitudinal and Hall resistivities, scaling behavior, and magnetizations are examined to study the effect of flux pinning in Ba(Fe1-xCox)(2)As-2 (BFCA) single crystals with x = 0.08 and 0.01. Larger values of activation energy, critical current density, and pinning force are obtained in BFCA with x = 0.10, indicating relatively strong pinning. The sign reversal of Hall resistivities is clearly observed in BFCA with x = 0.10. The correlation between longitudinal and Hall resistivities shows the scaling behavior of rho(xy) proportional to (rho(xx))(beta) with exponents beta = 3.0-3.4 and 2.0+/-0.2 for BFCA crystals with x = 0.08 and 0.10, respectively. Furthermore, the normal-state Hall angle is also observed to follow cot theta(H) = Lambda T-2 + C in BFCA crystals, and is explained by the Anderson theory. The relatively large C/Lambda value for BFCA with x = 0.10 also implies a larger contribution of impurity scattering due to more Co atoms, which may cause stronger pinning of flux lines. The results are analyzed and coincide with theory, including the pinning-induced backflow effect and plastic flow mechanism in vortex dynamics. |
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