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.

引用

页数：4

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