2004/06/14 by G. T. Liu, J. L. Luo, T. Xiang +8
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Analytical Chemistry (journal) #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Dimer #Doping #Isostructural #Magnetic and transport properties of perovskites and related materials #Magnetic field #Magnetic susceptibility #Materials science #Nuclear magnetic resonance #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Thermodynamics #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.71.014441
published as Phys. Rev. B 71, 014441 (2005) · 5 pages, 5 figurs
arxiv created 2004/06/14 · openalex publication_date 2005/01/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A series of compounds M0.1Sr0.9Cu2(BO3)2 with Sr substituted by M=Al, La, Na, and Y and YxSr_1\ensuremath-xCu2(BO3)2 with x=0.06, 0.08, 0.10, 0.20, and 0.30 were prepared by solid state reaction. X-ray diffraction analysis showed that these doping compounds are isostructural to SrCu2(BO3)2. The resistivity at room temperature, the magnetic susceptibility from 1.9 to 300 K in an applied magnetic field of 1.0 T and the specific heat from 1.9 to 25 K in applied fields up to 14 T were measured, respectively. The spin gap is deduced from the low temperature susceptibility as well as the specific heat. It is found that the spin gap is strongly suppressed by magnetic fields and the doping content. No superconductivity is observed in all doping samples.