Antiferromagnetic Spin Wave in Ce2CuGe6

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概要

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• Electrical-resistivity, static magnetic susceptibility, and low-temperature specific-heat data reveal that the bulk phase transition at $14.7{\pm}0.2$ K in Ce2CuGe6 is to an antiferromagnetic state. Analysis of the temperature dependent magnetic resistivity, magnetic susceptibility and magnetic heat capacity data suggests a Kramer's doublet ground state of Ce+3 ions in the compound Ce2CuGe6. Since the estimated Kondo temperature $(T_{\text{K}}){\sim}1$ K is much lower than the Néel temperature ($T_{\text{N}}{=}14.7$ K), the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction dominates the crystal-field interaction in the antiferromagnetic interaction. The magnetic heat capacity below 0.98 $T_{\text{N}}$ exhibits a $T^{3}$ behavior, which is a direct experimental confirmation and provides good evidence for antiferromagnetic spin wave according to the theory of Van Kranendonk and Van Vleck.

• Japan Society of Applied Physicsの論文
• 2004-01-15

著者

• Lee Wun-hsin

  Department Of Physics National Chung Cheng University

• Tseng Tien-Wei

  Department of Physics, National Chung-Cheng University, Ming-Hsiung, Chia-Yi 621, Taiwan, R.O.C.

• Chen Yang-Yuan

  Institute of Physics, Academia Sinica, Taipei 115, Taiwan, R.O.C.

• Lee Wun-Hsin

  Department of Physics, National Chung-Cheng University, Ming-Hsiung, Chia-Yi 621, Taiwan, R.O.C.

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