Magnetic-field-orient at ion dependence of the metamagnetic transitions in TmAgGe up to 55 T

Conference item

TmAgGe is an antiferromagnet based on the ZrNiAl structure. At low temperatures the spins are confined to distorted kagome-like planes, wherein the magnetisation is strongly anisotropic. A previous study has shown that a series of stepped magnetic transitions are apparent in low, in-plane magnetic fields and can be explained using a three-fold Ising-like model. Here we present high-magnetic-field magnetisation experiments showing that further stepped transitions are observed when the field is directed out of the kagome planes. Angledependent measurements in fields of up to 55 T show that there are at least two distinct and separate energy scales present in this system; the weak exchange interactions and the strong crystalline electric field interactions. Simulations of the magnetisation using a three-dimensional, free-energy minimisation technique allow us to suggest the nature and hierarchy of the forces acting on the Tm3+ moments.

Authors: Goddard, P; Singleton, J; Lima, A; Morosan, E; Blundell, S

• Publication status: Published
• Journal: Yamada Conference LX on Research in High Magnetic Fields
• Volume: 51
• Issue: 1
• Pages: 219-226
• Publication date: 2006-01-01
• Event title: 60th Yamada Conference on Research in High Magnetic Fields
• DOI: 10.1088/1742-6596/51/1/050
• EISSN: 1742-6596
• ISSN: 1742-6588