Lumsden, MD; Dunsiger, SR; Sonier, JE; Miller, RI; Kiefl, RF; Jin, R; He, J; ... Gardner, JS; + view all Lumsden, MD; Dunsiger, SR; Sonier, JE; Miller, RI; Kiefl, RF; Jin, R; He, J; Mandrus, D; Bramwell, ST; Gardner, JS; - view fewer (2002) Temperature dependence of the magnetic penetration depth in the vortex state of the pyrochlore superconductor, Cd2Re2O7. PHYS REV LETT , 89 (14) , Article 147002. 10.1103/PhysRevLett.89.147002.

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Abstract

We report transverse-field and zero-field muon spin rotation and relaxation studies of the superconducting rhenium oxide pyrochlore, Cd2Re2O7. Transverse-field measurements (H=0.007 T) show line broadening below T-c, which is characteristic of a vortex state, demonstrating conclusively the type-II nature of this superconductor. The penetration depth is seen to level off below about 400 mK (T/T(c)similar to0.4), with a rather large value of lambda(T=0)similar to7500 Angstrom. The temperature independent behavior below similar to400 mK is consistent with a nodeless superconducting energy gap. Zero-field measurements indicate no static magnetic fields developing below the transition temperature.

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