Specific Heat vs Field in the 30 K Superconductor BaFe$_{2}$(As$_{0.7}$P$_{0.3})_{2}$

Recently, superconductivity at 30 K has been reported [1] in P-doped BaFe$_{2}$As$_{2}$, with 1/3 of the As replaced by P. Magnetic penetration and thermal conductivity measurements [2] indicate a nodally gapped superconductor. We report here on measurements of the specific heat divided by temperature, C/T, as a function of field up to 15 T and down to 0.4 K in order to further investigate the nodal structure with another probe. \\[4pt] [1] S. Kasahara, et al., arXiv0905.4427. \\[0pt] [2] K. Hashimoto, et al., arXiv0907.4399.