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Pressure Effect on the superconducting properties of LaO_(1-x)F_(x)FeAs(x=0.11) superconductor

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arxiv 0803.4266 v2 pith:F57UMRIU submitted 2008-03-29 cond-mat.supr-con cond-mat.str-el

Pressure Effect on the superconducting properties of LaO_(1-x)F_(x)FeAs(x=0.11) superconductor

classification cond-mat.supr-con cond-mat.str-el
keywords superconductingpressurediamagneticfeashydrostaticphasesuperconductorsusceptibility
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Diamagnetic susceptibility measurements under high hydrostatic pressure (up to 1.03 GPa) were carried out on the newly discovered Fe-based superconductor LaO_{1-x}F_{x}FeAs(x=0.11). The transition temperature T_c, defined as the point at the maximum slope of superconducting transition, was enhanced almost linearly by hydrostatic pressure, yielding a dT_c/dP of about 1.2 K/GPa. Differential diamagnetic susceptibility curves indicate that the underlying superconducting state is complicated. It is suggested that pressure plays an important role on pushing low T_c superconducting phase toward the main (optimal) superconducting phase.

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