Precise magnetization measurement and magnetostriction of dense-Kondo compound CeNi2Al5

Abstract The precise magnetization at 400 mK and magnetostriction at 1.2 K of a magnetic dense-Kondo compound CeNi 2 Al 5 with a complex magnetic phase diagram are presented. Obvious anomalies corresponding to the phase transitions have been observed, involving stepwise changes of magnetization occurring at B i = 3.52 T, B e = 6.58 T, B h = 5.67 T and B f = 6.36 T. At these fields, stepwise changes of magnetostriction are also observed. Only the field B i increases with increasing temperature, contrary to the other transition fields. We contend that not only the Kondo effect but also magnetoelastic and/or quadrapolar effects must be taken into account to explain these complex phase transitions.