Doping effects on the two-dimensional spin dimer compound
- 28 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 71 (1), 014441
- https://doi.org/10.1103/physrevb.71.014441
Abstract
A series of compounds with Sr substituted by , La, Na, and Y and with , 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 . 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.
Keywords
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