MAGNETIC ENTROPY CHANGE IN Mnl.lFeo.9PI.,Ge, COMPOUNDS

do not contain As, with x = 0.20, 0.22,0.24,0.26, 0.28 and 0.30. Polycrystalline samples of Mnl,IFeo9Pl.,Ge, compounds with x = 0.20, 0.22, 0.24, 0.26 and 0.30 were prepared by ball milling and solid-state reaction as reported previously 141. The powder x-ray diffraction (XRD) patterns of the samples can be indexed in the FszP-type structure. The analysis of the XRD data shows that the lattice parameter a increases and the c