Determination of the long-range magnetic interactions in NdCo2Si2 under high pressure

The magnetization of antiferromagnetic NdCo2Si2 was measured in high magnet ic fields up to 15 T along the c-axis under high pressure up to 1.0 GPa. Nd Co2Si2 exhibits three metamagnetic transitions at low temperatures. From th e critical fields and the Neel temperature determined, the nearest-neighbor , second-nearest-neighbor and third-nearest-neighbor interactions between t he c-planes were estimated under high pressure. (C) 2001 Elsevier Science B .V. All rights reserved.