Abstract
The magnetic properties of cubic intermetallic compound NdCu 4 Ag single crystals were studied in detail through magnetization, susceptibility, specific heat and electrical resistivity measurements. An observed anomaly in C ( T ) with a sharp peak 26 J/(mol K) at 4.2 K, together with an antiferromagnetic behavior of χ( T ), indicated that an antiferromagnetic phase transition occurred at this temperature. Anisotropic properties in M ( H ), χ( T ), and C ( T ) at external fields were investigated in directions of [001], [110], and [111], respectively. Two metamagnetic transitions were observed below the Neel temperature T N when a magnetic field was applied in three directions. In all the three directions, T N decreased with an increase in magnetic field and new anomalies induced by a high H ext were observed in both χ( T ) and C ( T ), implying that two new magnetic phases coexisted with the antiferromagnetic phase. From the specific heat measurements, it is speculated that the crystalline electric field ...
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