Multi-step Magnetic Transition in Non-centrosymmetric Compound CeCoGe3

被引：17
|
作者：
Kaneko, Koji [1 ,2 ]
Metoki, Naoto [1 ]
Takeuchi, Tetsuya [3 ]
Matsuda, Tatsuma D. [1 ]
Haga, Yoshinori [1 ]
Thamizhavel, Arumugam [4 ]
Settai, Rikio [4 ]
Onuki, Yoshichika [1 ,4 ]
机构：
[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan
[2] Max Planck Inst Chem Phys Fester Stoffe, D-01187 Dresden, Germany
[3] Osaka Univ, Low Temp Ctr, Toyonaka, Osaka 5600043, Japan
[4] Osaka Univ, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan
来源：
25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4: QUANTUM PHASE TRANSITIONS AND MAGNETISM | 2009年 / 150卷
关键词：
D O I：
10.1088/1742-6596/150/4/042082
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Single crystal neutron diffraction experiments on non-centrosymmetric pressure-induced superconductor CeCoGe3 were carried out in order to reveal a magnetic structure in the ground state. This compound shows multi-step magnetic transitions at T-N1=20 K, T-N2=11.5K and T-N3=7.5 K. We have observed the appearance of the magnetic reflection at (101/2) together with the weaker one at (101/4) and its higher-order harmonics at 2.9 K. These results indicate that the ground state magnetic structure consists of two components with dominant q(1)=(001/2) and q(2)=(003/4). No magnetic peak was observed along (00l), indicating that the directions of corresponding antiferromagnetic moments are parallel to the c-axis. Consequently, CeCoGe3 has at least two Ce sites in the ground state with respect to the magnitude of the magnetic moment.
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页数：4
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