Magnetic Excitations of the 2-D Sm Spin Layers in Sm(La,Sr)CuO4

Details Magnetic Excitations of the 2-D Sm Spin Layers in Sm(La,Sr)CuO4 Magnetic Excitations of the 2-D Sm Spin Layers in Sm(La,Sr)CuO4

2006-06-19

arxiv.org/abs/cond-mat/0606499v1

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 2 figures, submitted to ICM

Scientific paper

10.1016/j.jmmm.2006.10.366

We present specific heat and susceptibility data on Sm(La,Sr)CuO4 in magnetic fields up to 9 T and temperatures down to 100 mK. We find a broad peak in specific heat which is insensitive to magnetic field at a temperature of 1.5 K with a value of 2.65 J/mol K. The magnetic susceptibility at 5 T continues to increase down to 2 K, the lowest temperature measured. The data suggest that the Sm spin system may be an ideal realization of the frustrated Heisenberg antiferromagnet on the square lattice.

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