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Evolution of the Pauli spin-paramagnetic effect on the upper critical fields of single-crystalline KxFe2-y,Se2-zSz.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Jul2014, Vol. 90 Issue 2, p024505-1-024505-5. 5p. - Publication Year :
- 2014
-
Abstract
- We have studied the temperature dependence of the upper critical fields μ0Hc2 of KxFe2-ySe2-zSz single crystals up to 60 T. The μ0Hc2 for H ∥ ab and H ∥ c decrease with increasing sulfur content. The detailed analysis using Werthamer-Helfand-Hohenberg theory including the Pauli spin-paramagnetic effect shows that μ0Hc2 for H ∥ ab is dominated by the spin-paramagnetic effect, which diminishes with higher S content, whereas μ0Hc2 for H ∥ c shows a linear temperature dependence with an upturn at high fields. The latter observation can be ascribed to multiband effects that become weaker for higher S content. This results in an enhanced anisotropy of μ0Hc2 for high S content due to the different trends of the spin-paramagnetic and multiband effect for H ∥ ab and H ∥ c, respectively. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PAULI spin operators
*PARAMAGNETIC materials
*PARAMAGNETISM
*ANISOTROPY
*SULFUR
Subjects
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 90
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 97918541
- Full Text :
- https://doi.org/10.1103/PhysRevB.90.024505