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arxiv: cond-mat/0606499 · v1 · submitted 2006-06-19 · ❄️ cond-mat.str-el · cond-mat.stat-mech· cond-mat.supr-con

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

classification ❄️ cond-mat.str-el cond-mat.stat-mechcond-mat.supr-con
keywords magneticcuo4datadownheatspecificspinsusceptibility
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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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