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- Goto Terutaka
- Graduate School of Science and Technology, Niigata University
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- Watanabe Tomoyuki
- Graduate School of Science and Technology, Niigata University
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- Tsuduku Seiji
- Graduate School of Science and Technology, Niigata University
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- Kobayashi Haruki
- Graduate School of Science and Technology, Niigata University
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- Nemoto Yuichi
- Graduate School of Science and Technology, Niigata University
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- Yanagisawa Tatsuya
- Graduate School of Science and Technology, Niigata University
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- Akatsu Mitsuhiro
- Graduate School of Science and Technology, Niigata University
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- Ano Genki
- Graduate School of Science and Technology, Niigata University
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- Suzuki Osamu
- Graduate School of Science and Technology, Niigata University
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- Takeda Naoya
- Faculty of Engineering, Niigata University
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- Dönni Andreas
- National Institute for Materials Science
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- Kitazawa Hideaki
- National Institute for Materials Science
書誌事項
- タイトル別名
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- Quadrupole Ordering in Clathrate Compound Ce<SUB>3</SUB>Pd<SUB>20</SUB>Si<SUB>6</SUB>
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抄録
Low-temperature elastic properties of the clathrate compound Ce3Pd20Si6 were investigated using ultrasonic measurements. Pronounced softening of elastic constants (C11−C12)⁄2 and C44 with decreasing temperature indicates a precursor of electric quadrupole ordering due to a Γ8 quartet ground sate with an orbital degeneracy for 8c site of a Ce ion. A minimum of (C11−C12)⁄2 at TC=170 mK indicates a transition from paramagnetic phase I to an ordered phase III. Applied magnetic fields induce an antiferro-quadrupole (AFQ) ordered phase II with highly anisotropic character depending on the field direction, which resembles the AFQ phase with Oxy-type order parameter in CeB6 with the Γ8 ground sate. The order paramater of the phase III may be characterized by either magnetic dipole or magnetic octupole. The Γ7 ground state at 4a site may fall into a singlet screened by conduction electrons at low temperatures without long-range magnetic ordering.
収録刊行物
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 78 (2), 024716-024716, 2009
一般社団法人 日本物理学会
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キーワード
詳細情報
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- CRID
- 1390282679173310464
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- NII論文ID
- 130005437360
- 110007097862
- 210000107683
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- NII書誌ID
- AA00704814
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 9800634
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
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- 抄録ライセンスフラグ
- 使用不可