2007/12/06 by F. Lévy, F. Levy, I. Sheikin +9 · 1 citation
Materials Science · Physics and Astronomy · #Adiabatic process #Advanced Condensed Matter Physics #Condensed matter physics #Coupling (piping) #Field (mathematics) #Ground state #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic refrigeration #Magnetization #Materials science #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Plateau (mathematics) #Quantum mechanics #Spin (aerodynamics) #Supercooling #cond-mat.str-el
paper · pdf · doi:10.1209/0295-5075/81/67004
published as Europhysics Letters (EPL) 81 (2008) 67004 · submitted to European Physical Letters
arxiv created 2007/12/06 · openalex publication_date 2008/02/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present magnetic torque measurements on the Shastry-Sutherland quantum spin system SrCu 2 (BO 3 ) 2 in fields up to 31 T and temperatures down to 50 mK. A new quantum phase is observed in a 1 T field range above the 1/8 plateau, in agreement with recent NMR results. Since the presence of the DM coupling precludes the existence of a true Bose-Einstein condensation and the formation of a supersolid phase in SrCu 2 (BO 3 ) 2 , the exact nature of the new phase in the vicinity of the plateau remains to be explained. Comparison between magnetization and torque data reveals a huge contribution of the Dzyaloshinskii-Moriya interaction to the torque response. Finally, our measurements demonstrate the existence of a supercooling due to adiabatic magnetocaloric effects in pulsed field experiments.