Confirmation of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor and antiferromagnetic second-nearest-neighbor interactions in Rb${}_{2}$Cu${}_{2}$Mo${}_{3}$O${}_{12}$

Masashi Hase; Haruhiko Kuroe; Kiyoshi Ozawa; Osamu Suzuki; Hideaki Kitazawa; Giyuu Kido; Tomoyuki Sekine

doi:10.1103/PhysRevB.70.104426

paper

Confirmation of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor and antiferromagnetic second-nearest-neighbor interactions in Rb $_{2}$ Cu $_{2}$ Mo $_{3}$ O $_{12}$

arXiv:cond-mat/0404463 · doi:10.1103/PhysRevB.70.104426

Abstract

We have investigated magnetic properties of Rb $_{2}$ Cu $_{2}$ Mo $_{3}$ O $_{12}$ powder. Temperature dependence of magnetic susceptibility and magnetic-field dependence of magnetization have shown that this cuprate is a model compound of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor (1NN) and antiferromagnetic second-nearest-neighbor (2NN) competing interactions (competing system). Values of the 1NN and 2NN interactions are estimated as $J_{1} = - 138$ K and $J_{2} = 51$ K ( $α \equiv J_{2} / J_{1} = - 0.37$ ). This value of $α$ suggests that the ground state is a spin-singlet incommensurate state. In spite of relatively large $J_{1}$ and $J_{2}$ , no magnetic phase transition appears down to 2 K, while an antiferromagnetic transition occurs in other model compounds of the competing system with ferromagnetic 1NN interaction. For that reason, Rb $_{2}$ Cu $_{2}$ Mo $_{3}$ O $_{12}$ is an ideal model compound to study properties of the incommensurate ground state that are unconfirmed experimentally.

6 pages, 4 figures

Confirmation of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor and antiferromagnetic second-nearest-neighbor interactions in Rb $_{2}$ Cu $_{2}$ Mo $_{3}$ O $_{12}$

Abstract

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Confirmation of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor and antiferromagnetic second-nearest-neighbor interactions in Rb2​Cu2​Mo3​O12​

Abstract

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Cited by in corpus (102)

Confirmation of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor and antiferromagnetic second-nearest-neighbor interactions in Rb $_{2}$ Cu $_{2}$ Mo $_{3}$ O $_{12}$