LARGE MAGNETOCALORIC EFFECT NEAR WATER BOILING POINT IN RARE-EARTH BASED INTERMETALLICS

摘要

We investigate the magnetic and magnetocaloric properties of GdTiGe and GdTi_(0.9)M_(0.1)Ge(M = Zr, Mo or Hf). The samples consist of a mixture of two structural forms: the CeFeSi- and the CeScSi-type. They present second-order ferromagnetic transition with T_C in the 340– 380 K temperature range and magnetic entropy change as large as 1.1 J.K~(-1).kg~(-1) for a field variation of 2 T.