Almost Perfect Frustration in the Dimer Magnet Ba$_2$CoSi$_2$O$_6$Cl$_2$

Hidekazu Tanaka; Nobuyuki Kurita; Makiko Okada; Eiji Kunihiro; Yutaka Shirata; Kotaro Fujii; Hidehiro Uekusa; Akira Matsuo; Koichi Kindo; Hiroyuki Nojiri

doi:10.7566/JPSJ.83.103701

paper

Almost Perfect Frustration in the Dimer Magnet Ba $_{2}$ CoSi $_{2}$ O $_{6}$ Cl $_{2}$

arXiv:1404.2033 · doi:10.7566/JPSJ.83.103701

Abstract

We determined the crystal structure of Ba $_{2}$ CoSi $_{2}$ O $_{6}$ Cl $_{2}$ , which was synthesized in this work, and investigated its quantum magnetic properties using single crystals. This compound should be described as a two-dimensionally coupled spin-1/2 XY-like spin dimer system. Ba $_{2}$ CoSi $_{2}$ O $_{6}$ Cl $_{2}$ exhibits a stepwise magnetization process with a plateau at half of the saturation magnetization, irrespective of the field direction, although all the Co $^{2 +}$ sites are equivalent. This indicates that spin triplets are localized owing to the almost perfect frustration of interdimer exchange interactions. Thus, the spin states for the zero and 1/2 magnetization-plateau states are almost exactly given by the simple product of singlet dimers and the alternate product of singlet and triplet dimers, respectively.

arXiv comment8 pages, 8 figures, published in J. Phys. Soc. Jpn. http://dx.doi.org/10.7566/JPSJ.83.103701

Almost Perfect Frustration in the Dimer Magnet Ba $_{2}$ CoSi $_{2}$ O $_{6}$ Cl $_{2}$

Abstract

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Almost Perfect Frustration in the Dimer Magnet Ba2​CoSi2​O6​Cl2​

Abstract

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Cited by in corpus (17)

Almost Perfect Frustration in the Dimer Magnet Ba $_{2}$ CoSi $_{2}$ O $_{6}$ Cl $_{2}$