Transport and magnetic properties of RERuSn3 (RE=La, Ce, Pr, Nd and Sm) RERuSn3(RE:La,Ce,Pr,Nd,Sm)の輸送現象及び磁性
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Bibliographic Information
- Title
-
Transport and magnetic properties of RERuSn3 (RE=La, Ce, Pr, Nd and Sm)
- Other Title
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RERuSn3(RE:La,Ce,Pr,Nd,Sm)の輸送現象及び磁性
- Author
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福原, 忠
- Author(Another name)
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フクハラ, タダシ
- University
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東京都立大学
- Types of degree
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理学博士
- Grant ID
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甲第263号
- Degree year
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1991-03-25
Note and Description
博士論文
The electrical resistivity, thermoelectric power, Hall effect, magnetoresistivity, magnetic susceptibility, magnetization and specific heat on intermetallic ternary compounds RERuSn, (RE=La, Ce, Pr, Nd and Sm) have been investigated. CeRuSn_3 is found to be a new heavy fermion compound with a large coefficient of electronic specific heat γ=400 mJ/mol .K^2 at OK. In order to gain the deeper insight into the heavy fermion state of CeRuSn_3, non-stoichiometric compounds CeRuSn_x (2.85_<≦x≦>3.15), CeRu(Sn_<1-y> Tn_y,) _3 and NdRuSn_<2.91> have also been investigated. The low temperature resistivity for CeRuSn_x shows a maximum at x=3.O as a function of x. Sn deficjent samples show three step phase transitions at 33K, 4K and 1.3K. SmRuSn_3 is a new valence fluctuating compound with an antiferromagnetic ordering at 6K. The valeney of Sm ion is estimated to be 2.8~2.9. Both CeRuSn_3 and SmRuSn_3 show unique magnetic features possibly due to their crystal structures as compared to the reported heavy fermion and the valence fluctuation compounds. LaRuSn_3 shows superconducting transition at 1.5K. PrRuSn_3 and NdRuSn_3 do not show any magnetic ordering down to 1.8K.
東京都立大学, 1991-03-25, 理学博士, 甲第263号
Table of Contents
- Contents / (0005.jp2)
- 1.Introduction / p1 (0006.jp2)
- 2.Experiment / p9 (0014.jp2)
- 3.Results / p12 (0017.jp2)
- 3-1 RERuSn₃ (RE=La, Ce, Pr, Nd and Sm) / p12 (0017.jp2)
- 3-2 [化学式] (2.85≦x≦3.15) / p22 (0027.jp2)
- 4.Discussion / p29 (0034.jp2)
- 4-1 CeRuSn₃ / p29 (0034.jp2)
- 4-2 SmRuSn₃ / p33 (0038.jp2)
- 5.Conclusion / p35 (0040.jp2)
- Acknowledgement / p37 (0042.jp2)
- Appendix / p38 (0043.jp2)
- A Sample preparation and analysis / p39 (0044.jp2)
- B Results on U₃Ru₄Sn₁₃ / p42 (0047.jp2)
- C Results on U₃Rh₄Sn₁₃ / p44 (0049.jp2)
- D Summary on U-system / p46 (0051.jp2)
- References / p47 (0052.jp2)
- Figures / p51 (0056.jp2)
- Supplement / (0095.jp2)