Magnetic excitation in a new spin gap compound Cu$_2$Sc$_2$Ge$_4$O$_{13}$: Comparison to Cu$_2$Fe$_2$Ge$_4$O$_{13}$

T. Masuda; G. J. Redhammer

doi:10.1103/PhysRevB.74.054418

paper

Magnetic excitation in a new spin gap compound Cu $_{2}$ Sc $_{2}$ Ge $_{4}$ O $_{13}$ : Comparison to Cu $_{2}$ Fe $_{2}$ Ge $_{4}$ O $_{13}$

arXiv:cond-mat/0607029 · doi:10.1103/PhysRevB.74.054418

Abstract

The compound \CuScGeO is presented as a new member of the family of weakly coupled spin chain and dimer compounds \CuMGeO. Magnetic susceptibility, heat capacity, and neutron inelastic scattering measurements reveal that the compound has the same spin dimer component as \CuFeGeO. The observed narrow band excitation in bulk measurements is consistent with spin gap behavior. The energy scale of the weakly coupled dimers in the Sc compound is perfectly coincident with that in the Fe compound.

5 pages

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Abstract

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Magnetic excitation in a new spin gap compound Cu $_{2}$ Sc $_{2}$ Ge $_{4}$ O $_{13}$ : Comparison to Cu $_{2}$ Fe $_{2}$ Ge $_{4}$ O $_{13}$