Thermal expansion, magnetostriction and magnetic susceptibility under pressure of CeAgSb2

The properties of polycrystalline CeAgSb2 have been investigated. The magne tic contribution to the linear thermal expansion coefficient of CeAgSb2 in zero magnetic held has a broad maximum value of 7.9 x 10(-6) K-1 near 17 K but there is no peak at the Neel temperature T-N 9.5 K. The Neel temperatur e is found to decrease under pressure at the rate partial derivative(ln T-N )/partial derivative P = - 10.1 Mbar(-1) indicating that it is a magnetic K ondo lattice on the right-hand side of the Doniach diagram. Below T-N the m agnetostriction shows hysteresis with an average high field value partial d erivative(ln V)/partial derivative B approximate to + 6 x 10(-6) T-1. (C) 1 999 Elsevier Science B.V. All rights reserved.