2011 Fiscal Year Final Research Report
Study for the multipolar interaction in cubic rare-earth compounds with no four-fold axis
| Project/Area Number |
21740238
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kobe University |
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Principal Investigator |
MATSUOKA Eiichi 神戸大学, 大学院・理学研究科, 准教授 (20400228)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 四極子秩序 / 多極子秩序 / 反強磁性秩序 / 強相関系 |
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| Research Abstract |
The effects of multipolar interaction for the magnetic properties of cubic compounds RPd_3S_4(R : rare-earth metals) whose crystal structures have no four-fold axis have been examined by performing magnetization, electrical resistivity and specific-heat measurements and neutron-scattering experiments. Following are the results of this study.
(1) TbPd_3S_4 shows magnetic-field induced antiferroquadrupolar ordering.
(2) The origin for the first-order like antiferromagnetic transitions in SmPd_3S_4 and TbPd_3S_4 is the competition between the magnetic interaction and multipolar interaction.
(3) Possible order parameter of the phase transition in PrPd_3S_4 is not magnetic octupole but magnetic dipole.
(4) New tetragonal compounds LnRu_2X_2B(Ln=Ce, Pr, Nd、X=Al, Ga) were synthesized. These compounds show ferromagnetic transitions at rather high temperatures of approximately 10 K.
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