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Magnetotransport studies of superconductingPr4Fe2As2Te1−xO4
- Source :
- Physical Review B. 93
- Publication Year :
- 2016
- Publisher :
- American Physical Society (APS), 2016.
-
Abstract
- We report a study of the electrical transport properties of single crystals of $\mathrm{P}{\mathrm{r}}_{4}\mathrm{F}{\mathrm{e}}_{2}\mathrm{A}{\mathrm{s}}_{2}\mathrm{T}{\mathrm{e}}_{1\ensuremath{-}x}{\mathrm{O}}_{4}$, a recently discovered iron-based superconductor. Resistivity, Hall effect, and magnetoresistance are measured in a broad temperature range revealing the role of electrons as dominant charge carriers. The significant temperature dependence of the Hall coefficient and the violation of Kohler's law indicate multiband effects in this compound. The upper critical field and the magnetic anisotropy are investigated in fields up to 16 T, applied parallel and perpendicular to the crystallographic $c$ axis. Hydrostatic pressure up to 2 GPa linearly increases the critical temperature and the resistivity residual ratio. A simple two-band model is used to describe the transport and magnetic properties of $\mathrm{P}{\mathrm{r}}_{4}\mathrm{F}{\mathrm{e}}_{2}\mathrm{A}{\mathrm{s}}_{2}\mathrm{T}{\mathrm{e}}_{1\ensuremath{-}x}{\mathrm{O}}_{4}$. The model can successfully explain the strongly temperature-dependent negative Hall coefficient and the high magnetic anisotropy, assuming that the mobility of electrons is higher than that of holes.
- Subjects :
- Physics
Superconductivity
Condensed matter physics
Magnetoresistance
Hydrostatic pressure
02 engineering and technology
Atmospheric temperature range
021001 nanoscience & nanotechnology
01 natural sciences
Magnetic anisotropy
Electrical resistivity and conductivity
Hall effect
0103 physical sciences
010306 general physics
0210 nano-technology
Critical field
Subjects
Details
- ISSN :
- 24699969 and 24699950
- Volume :
- 93
- Database :
- OpenAIRE
- Journal :
- Physical Review B
- Accession number :
- edsair.doi...........da714acdee0a13ad7804d9ecf2fff2f3
- Full Text :
- https://doi.org/10.1103/physrevb.93.094519