Long-range order and magnetic properties of Mn xPt 1− x thin films

Abstract

Thin films of Mn x Pt 1− x ( x = 0.18, 0.22, 0.25, 0.30, 0.34) were prepared by magnetron sputtering onto quartz substrates. After annealing in vacuum for 1 h at 850°C, X-ray diffraction indicates that the films have the Cu 3Au cubic structure ( a = 3.87 A ̊ ) and are highly textured with the (111) axis along the film normal. These samples have a high degree of long-range order, as indicated by the ratio of the intensities of the superlattice (100) and fundamental (200) X-ray diffraction reflections. We report here the results of magnetic and magneto-optical measurements on these samples over a wide range of temperatures.