Thermal expansion and magnetostriction of CePt 2Si 2

We have measured the coefficients of linear thermal expansion of a single-crystalline sample of the tetragonal Kondo-lattice compound CePt ₂Si ₂ over a wide temperature range (0.3 < T < 220 K). The coefficient of volume expansion exhibits two broad anomalies centered at 70 and 180 K. Magnetostriction data taken at 0.4 K ( B ‖ [110]), confirm the presence of a metamagnetic-like transition at 2.6 T.