Physics – Condensed Matter – Superconductivity
Scientific paper
2011-01-17
J. Phys.: Conf. Ser. 273 012110 (2011)
Physics
Condensed Matter
Superconductivity
4 pages, 3 figures SCES2010, To appear in J. Phys.: Conf. Ser. for SCES2010
Scientific paper
10.1088/1742-6596/273/1/012110
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 magnetic field at Los Alamos. Distinct behaviour is observed in both the magnetoresistance Rxx({\mu}0H) and the Hall resistance Rxy({\mu}0H) while crossing the structural phase transition at Ts \approx 150K. At temperatures above Ts, little magnetoresistance is observed and the Hall resistivity follows linear field dependence. Upon cooling down the system below Ts, large magnetoresistance develops and the Hall resistivity deviates from the linear field dependence. Furthermore, we found that the transition at Ts is extremely robust against the external magnetic field. We argue that the magnetic state in CeFeAsO is unlikely a conventional type of spin-density-wave (SDW).
Balakirev Fedor F.
Chen Guo-Feng
Jiao Licheng
Luo Jian-Lin
Singleton John
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