We propose to use inelastic neutron scattering to search for the existence of spin fluctuations in two iron phosphide superconductors, (La,Ca)FePO and Sr2ScFePO3. The objective is to compare and contrast the magnetic response of the iron phosphide superconductors with that of the more widely-studied iron arsenide superconductors which have much higher superconducting transition temperatures. A particular goal is to see whether there is a superconductivity-induced resonance peak which could support the hypothesis of a common mechanism of superconductivity in the phosphides and arsenides based on magnetic fluctuations. Measurements will be made on powdered samples of the two compounds since single crystals are not available.