The Magnetic Investigation of Mn++, Co++, Ni++ and Cu++ Ammine and Anhydrate Salts at Low Temperatures

Abstract

The magnetic susceptibility measurements of ammine salts and an-hydrate salts of Mn ++ , Co ++ , Ni ++ and Cu ++ ions at the temperature above 90°K have been carried out previously by Kido and the present author. The magnetic susceptibilities of these salts obtained by them show no deviation from the Curie-Weiss law down to 90°K. The results for magnetic susceptibility measurements of these salts at liquid helium and liquid hydrogen temperatures are given in the present report. The susceptibility measurements were carried out by the Hartsbon bridge method. The salts which were studied are Mn(NH 3 ) 6 Cl 2 , Mn(NH 3 ) 2 Cl 2 , Mn(NH 3 )Cl 2 , MnCl 2 , Co(NH 3 ) 6 Cl 2 , Co(NH 3 ) 2 Cl 2 , Co(NH 3 )Cl 2 , CoCl 2 , Ni(NH 3 ) 6 ·Cl 2 , Ni(NH 3 ) 6 (ClO 4 ) 2 , Ni(NH 3 ) 2 Cl 2 , Ni(NH 3 )Cl 2 , NiCl 2 , Cu(NH 3 ) 4 SO 4 ·H 2 O, Cu(NH 3 ) 2 SO 4 and CuSO 4 . The antiferromagnetic or metamagnetic behavior in all other salts except Mn(NH 3 ) 6 Cl 2 , Mn(NH 3 ) 2 Cl 2 , Co(NH 3 ) 2 Cl 2 , Ni(NH 3 ) 6 Cl 2 , Ni(NH...