Thermal expansion of MnRhP

The temperature dependence of the lattice parameters of MnRhP was determine d in the temperature range from 80 K to 593 K by X-ray diffraction. The tem perature dependence of the exchange strictions of MnRhP was estimated from the experimental results by using a Gruneisen relation. Based on the molecu lar field theory, we estimated the pressure derivative of the Curie tempera ture to be +1.7 K kbar(-1), which is in good agreement with the value obtai ned by direct measurement. (C) 1998 Elsevier Science S.A. All rights reserv ed.