Magnetic and thermal behavior of CeAlX (X=Si and Ge) compounds

CeSiAl and CeGeAl crystallise in the &#945;-ThSi<SUB>2</SUB> type structure. Heat capacity measurements show that both order magnetically at 7.1 and 4 K respectively, with entropy nearly equal to Rln2 in both compounds. Magnetisation measurements reveal that while CeSiAl orders ferromagnetically. CeGeAl is an antiferromagnet. The single-site Kondo effect appears to be negligible in these materials