PlumX Metrics
Embed PlumX Metrics

Structural and superconducting properties of Rb Os2 O6 single crystals

Physical Review B - Condensed Matter and Materials Physics, ISSN: 1098-0121, Vol: 77, Issue: 13
2008
  • 7
    Citations
  • 0
    Usage
  • 3
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

Single crystals of Rb Os2 O6 have been grown from Rb2 O and Os in sealed quartz ampoules. The crystal structure has been identified at room temperature as cubic with the lattice constant a=10.1242 (12) Å. The anisotropy of the tetrahedral and octahedral networks is lower and the displacement parameters of alkali metal atoms are smaller than those for K Os2 O6, so the "rattling" of the alkali atoms in Rb Os2 O6 is less pronounced. The superconducting properties of Rb Os2 O6 in the mixed state have been described well within the London approach and the Ginzburg-Landau parameter κ (0) ≅31 has been derived from the reversible magnetization. This parameter is field dependent and changes at low temperatures from κ≅22 (low fields) to κ≅31 at Hc2. The thermodynamic critical field Hc (0) =1.3 kOe and the superconducting gap 2 Δo kB Tc ≅3.2 have been estimated. These results, together with the slightly different Hc2 (T) dependence obtained for crystals and polycrystalline Rb Os2 O6, evidently prove that this compound is a weak-coupling BCS-type superconductor close to the dirty limit. © 2008 The American Physical Society.

Bibliographic Details

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know