書誌事項
- タイトル別名
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- High-Pressure NMR Study of Heavy Fermion Spinel LiV2O4
- スピネル化合物LiV2O4の高圧核磁気共鳴
- スピネル カゴウブツ LiV2O4 ノ コウアツカク ジキ キョウメイ
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抄録
We have developed high-pressure NMR technique with an Indenter Cell using NiCrAl alloy. It was designed to set easily into a conventional dilution fridge and/or high field magnet. We have succeeded in 7Li-NMR measurement of a heavy fermion spinel LiV2O4 in T-range between 60 mK and 30 K under pressure up to 4.7 GPa. At ambient pressure, 1/T1 shows a broad maximum around 50 K and is proportional to the temperature below 6 K. This is quite similar to the relaxation behavior in f-electron HF systems. However, 1/T1T becomes larger with applying higher pressure below 10 K and does not obey T1T = constant relation down to 1 K. Knight shift K, meanwhile, is independent of pressure above 2 GPa, indicating that the uniform component of susceptibility χ(0) does not change under high pressure. Some antiferromagnetic fluctuations with wave vector q ≠ 0 dominate relaxation rate in LiV2O4 near the boundary of the pressure induced insulating phase.
収録刊行物
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- 高圧力の科学と技術
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高圧力の科学と技術 13 (4), 314-319, 2003
日本高圧力学会
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詳細情報 詳細情報について
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- CRID
- 1390001204381227904
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- NII論文ID
- 10012019106
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- NII書誌ID
- AN10452913
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- COI
- 1:CAS:528:DC%2BD2cXhsFehtbc%3D
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- ISSN
- 13481940
- 0917639X
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- NDL書誌ID
- 6833537
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可