1. NaCuMoO_4(OH) as a Candidate Frustrated J_1-J_2 Chain Quantum Magnet
- Author
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Takahiro Sakurai, Shohei Ikeda, Syota Yoshida, Hitoshi Ohta, Yoshihiko Okamoto, Zenji Hiroi, Akira Matsuo, Koichi Kindo, Shigeo Hara, Yoko Kitahara, Susumu Okubo, and Kazuhiro Nawa
- Subjects
Materials science ,Strongly Correlated Electrons (cond-mat.str-el) ,Condensed matter physics ,FOS: Physical sciences ,General Physics and Astronomy ,Thermal fluctuations ,Magnetic susceptibility ,Magnetization ,Condensed Matter - Strongly Correlated Electrons ,Ferromagnetism ,Magnet ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,Saturation (magnetic) ,Spin-½ - Abstract
In a frustrated J_1-J_2 chain with the nearest-neighbor ferromagnetic interaction J_1 and the next-nearest-neighbor antiferromagnetic interaction J_2, novel magnetic states such as a spin-nematic state are theoretically expected. However, they have been rarely examined in experiments because of the difficulty in obtaining suitable model compounds. We show here that the quasi-one-dimensional antiferromagnet NaCuMoO_4(OH), which comprises edge-sharing CuO_2 chains, is a good candidate J_1-J_2 chain antiferromagnet. The exchange interactions are estimated as J_1 = - 51 K and J_2 = 36 K by comparing the magnetic susceptibility, heat capacity, and magnetization data with the data obtained using calculations by the exact diagonalization method. High-field magnetization measurements at 1.3 K show a saturation above 26 T with little evidence of a spin nematic state expected just below the saturation field, which is probably due to smearing effects caused by thermal fluctuations and the polycrystalline nature of the sample., 6 pages, 4 figures
- Published
- 2014