Thermal expansion, magnetostriction and magnetic susceptibility under pressure of CeAgSb2

The properties of polycrystalline CeAgSb2 have been investigated. The magnetic contribution to the linear thermal expansion coefficient of CeAgSb2 in zero magnetic field has a broad maximum value of 7.9×10−6 K−1 near 17 K but there is no peak at the Neel temperature T N 9.5 K. The Neel temperature is found to decrease under pressure at the rate ∂ ( ln T N )/ ∂ P=−10.1 Mbar−1 indicating that it is a magnetic Kondo lattice on the right-hand side of the Doniach diagram. Below TN the magnetostriction shows hysteresis with an average high field value ∂ ( ln V)/ ∂ B≈+6×10 −6 T−1.