Physics Commons^™

High Magnetic Field Thermal-Expansion And Magnetostriction Of Uru2si2, Victor Correa, Timothy Murphy, Eric Palm, Stanley Tozer, Peter Sharma, Neil Harrison, Jamie Marcelo, George Schmiedeshoff, John Mydosh

George Schmiedeshoff

We present high magnetic field (up to 45 T) thermal-expansion and magnetostriction results on URu2Si2 single crystals. The volume change associated with the transition to the ``hidden'' order phase becomes increasingly discontinous as the magnetic field is raised above 30 T. This confirms recent thermal conductivity and specific heat experiments indicating a strong coupling between the ``hidden'' order parameter and the lattice which suggest some sort of charge ordered state. Several other transitions are observed at higher fields, many of them showing hysteresis, while a change in the sign of the magnetostriction coefficient is observed at the metamagnetic transition (BM …