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Significant enhancement of upper critical fields by doping and strain in Fe-based superconductors
C. Tarantini, A. Gurevich, J. Jaroszynski +7
We report measurements of Hc2(T) up to 85 Tesla on Ba1-xKxAs2Fe2 single crystals and FeSe1-xTex films tuned by doping and strain. We observed an Hc2 enhancement by nearly 25 T at 3…
Direct observation of multiple spin zeroes in the underdoped high temperature superconductor YBa2Cu3O6+x
Suchitra E. Sebastian, N. Harrison, M. M. Altarawneh +6
We report the direct observation of multiple `spin zeroes' in angle-dependent magnetic quantum oscillations measured up to 85T in YBa2Cu3O6+x, at which the amplitude falls to a dee…
Localized and itinerant dichotomy of electrons in Ba(Fe,Co)2As2
H. Q. Yuan, L. Jiao, F. F. Balakirev +9
Variant approaches, either based on the Fermi surface nesting or started from the proximity to a Mott-insulator, were proposed to elucidate the physics in iron pnictides, but no co…
{Rearrangement of the antiferromagnetic ordering at high magnetic fields in SmFeAsO and SmFeAsOF single crystals
S. Weyeneth, P. J. W. Moll, R. Puzniak +11
The low-temperature antiferromagnetic state of the Sm-ions in both nonsuperconducting SmFeAsO and superconducting SmFeAsOF single crystals was studied by magnetic t…
The magnetoresistance and Hall effect in CeFeAsO: a high magnetic field study
H. Q. Yuan, L. Jiao, J. Singleton +4
The longitudinal electrical resistivity and the transverse Hall resistivity of CeFeAsO are simultaneously measured up to a magnetic field of 45T using the facilities of pulsed magn…
Upper critical field of the 122-type iron pnictide superconductors
L. Jiao, J. L. Zhang, F. F. Balakirev +4
The upper critical fields () of the single crystals and were determined by means of measuring the electrical resistivit…