Induced Superconductivity by Vanadium Substitution in the Diboride HfB$_{\mathrm{2}}$*

The diboride HfB$_{\mathrm{2}}$ is a non-superconducting diamagnetic compound that crystallizes in the AlB$_{\mathrm{2}}$ prototype crystal structure. The most well known compound in the AlB$_{\mathrm{2}}$ structure is the multiband superconductor MgB$_{\mathrm{2}}$ with a critical temperature close to 39K. In this work we present the systematic substitution of hafnium for vanadium in Hf$_{\mathrm{(1-x)}}$V$_{\mathrm{x}}$B$_{\mathrm{2}}$ and report induced superconductivity with a critical temperature up to 8.4K. The superconductivity characterization by magnetization, resistivity, and heat capacity measurements are presented.