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Phys. Rev. Lett. 94, 227201 (2005) [4 pages]

Experimental Observation of the 1/3 Magnetization Plateau in the Diamond-Chain Compound Cu3(CO3)2(OH)2

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H. Kikuchi1, Y. Fujii1, M. Chiba1, S. Mitsudo2, T. Idehara2, T. Tonegawa3, K. Okamoto4, T. Sakai5,*, T. Kuwai6, and H. Ohta7
1Department of Applied Physics, University of Fukui, Fukui 910-8507, Japan
2Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan
3Department of Mechanical Engineering, Fukui University of Technology, Fukui 910-8505, Japan
4Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
5Department of Physics, Tohoku University, Sendai 980-8578, Japan
6Faculty of Science, Toyama University, Toyama 930-8555, Japan
7Molecular Photoscience Research Center, Kobe University, Kobe 657-8501, Japan

Received 28 September 2004; published 6 June 2005

The magnetic susceptibility, high field magnetization, and specific heat measurements of Cu3(CO3)2(OH)2, which is a model substance for the frustrating diamond spin chain model, have been performed using single crystals. Two broad peaks are observed at around 20 and 5 K in both magnetic susceptibility and specific heat results. The magnetization curve has a clear plateau at one third of the saturation magnetization. The experimental results are examined in terms of theoretical expectations based on exact diagonalization and density matrix renormalization group methods. An origin of magnetic anisotropy is also discussed.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.227201
DOI:
10.1103/PhysRevLett.94.227201
PACS:
75.10.Pq, 75.40.Cx, 75.50.Ee

*Present address: Japan Atomic Energy Research Institute, SPring-8, Mikazuki, Hyogo 679-5148, Japan

See Also

Comment: Bo Gu and Gang Su, Comment on “Experimental Observation of the 1/3 Magnetization Plateau in the Diamond-Chain Compound Cu3(CO3)2(OH)2”, Phys. Rev. Lett. 97, 089701 (2006).

Reply: H. Kikuchi, Y. Fujii, M. Chiba, S. Mitsudo, T. Idehara, T. Tonegawa, K. Okamoto, T. Sakai, T. Kuwai, and H. Ohta, Kikuchi et al. Reply:, Phys. Rev. Lett. 97, 089702 (2006).

 
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