  Herein, we report the synthesis and detailed superconducting properties of a
new high entropy alloy superconductor with nominal composition
Nb$_{20}$Re$_{20}$Zr$_{20}$Hf$_{20}$Ti$_{20}$ using powder X-ray diffraction
(XRD), energy-dispersive X-ray spectroscopy (EDX), magnetization, transport,
and thermodynamic measurements. The room temperature powder XRD confirms that
the alloy is arranged on a simple body centered cubic crystal lattice with
lattice parameter a = 3.38 (1) $\text{\AA}$. EDX measurement yields an average
composition of Nb$_{21}$Re$_{16}$Zr$_{20}$Hf$_{23}$Ti$_{20}$ (in atomic $\%$).
Transport, magnetic and heat capacity measurements reveal that the material is
a type-II superconductor with the bulk superconducting transition at $T_{c}$ =
5.3 K, lower critical field $H_{c1}$(0) = 33 mT and upper critical field
$H_{c2}$(0) = 8.88 T. Low temperature specific heat measurement indicates that
the sample is a moderately coupled superconductor, and the electronic specific
heat data fits well with the single-gap BCS model.
