On the superconductivity of the Li$_{x}$RhB$_{y}$ compositions

H. Takeya; M. ElMassalami; H. S. Amorim; H. Fujii; T. Mochiku; Y. Takano

doi:10.1088/2053-1591/1/4/046001

paper

On the superconductivity of the Li $_{x}$ RhB $_{y}$ compositions

arXiv:1410.2948 · doi:10.1088/2053-1591/1/4/046001

Abstract

We observed superconductivity ( $T_{c}$ $≃$ 2-3 K) in Li $_{x}$ RhB $_{y}$ intermetallics wherein $x$ and $y$ vary over a wide compositional range. The crystal structure consists of cubic unit-cell ( $a$ $≃$ 12.1 Å) with centro-symmetric space group $P n 3 ˉ n$ . A weak but positive pressure-induced increase of $T_{c}$ was observed. The correlations between the composition and each of the followings were followed over a wide range of $x$ and $y$ : the unit-cell dimensions, $T_{c}$ , Sommerfeld coefficient $γ$ , Debye temperature $θ_{D}$ , and critical fields $H$ $_{c 1}$ and $H$ $_{c 2}$ . The thermal evolution of the electronic specific heat within the superconducting phase was observed to follow a quadratic-in- $T$ behavior. In addition, a paramagnetic Meissner Effect (PME) is manifested during a low-field-cooled magnetization cycle. This manifestation of quadratic-in- $T$ behavior and PME feature will be discussed.

6 pages, 8 figures, to appear in Materials Research Express (2014)

On the superconductivity of the Lix​RhBy​ compositions

Abstract

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On the superconductivity of the Li $_{x}$ RhB $_{y}$ compositions