Print Email Facebook Twitter Thermodynamic Measurement of Angular Anisotropy at the Hidden Order Transition of URu2Si2 Title Thermodynamic Measurement of Angular Anisotropy at the Hidden Order Transition of URu2Si2 Author Trinh, Jennifer (University of California) Brück, E.H. (TU Delft RST/Fundamental Aspects of Materials and Energy; TU Delft TU Delft Library) Siegrist, Theo (National High Magnetic Field Laboratory; Florida State University) Flint, Rebecca (Iowa State University) Chandra, Premala (Rutgers University) Coleman, Piers (Rutgers University; Royal Holloway University of London) Ramirez, Arthur P. (University of California) Department TU Delft Library Date 2016-10-05 Abstract The heavy fermion compound URu2Si2 continues to attract great interest due to the unidentified hidden order it develops below 17.5 K. The unique Ising character of the spin fluctuations and low-temperature quasiparticles is well established. We present detailed measurements of the angular anisotropy of the nonlinear magnetization that reveal a cos4θ Ising anisotropy both at and above the ordering transition. With Landau theory, we show this implies a strongly Ising character of the itinerant hidden order parameter. To reference this document use: http://resolver.tudelft.nl/uuid:724820e6-00d1-4b03-8eaa-08e9e58297ce DOI https://doi.org/10.1103/PhysRevLett.117.157201 ISSN 0031-9007 Source Physical Review Letters, 117 (15) Part of collection Institutional Repository Document type journal article Rights © 2016 Jennifer Trinh, E.H. Brück, Theo Siegrist, Rebecca Flint, Premala Chandra, Piers Coleman, Arthur P. Ramirez Files PDF PhysRevLett.117.157201.pdf 540.4 KB Close viewer /islandora/object/uuid:724820e6-00d1-4b03-8eaa-08e9e58297ce/datastream/OBJ/view