| Project/Area Number |
01460024
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
固体物性
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
1989 – 1990
|
| Project Status |
Completed (Fiscal Year 1990)
|
| Budget Amount *help |
¥6,800,000 (Direct Cost: ¥6,800,000)
Fiscal Year 1990: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1989: ¥5,500,000 (Direct Cost: ¥5,500,000)
|
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| Keywords | Heavy Fermion / Low Carrier / Rare Earth / Pnictides / Yb / Sm / 希上類プニクタイト / Sm_3Se_4 / Yb_4As_3 / Ybモノプニクタイト / Ceモノプニクタイト / Smモノプニクタイト / 半金属 |
|---|
| Research Abstract |
The Heavy Fermion state in extremely low carrier concentration cannot be understood by simple extension of exact solution of single impurity kondo problem. This problem have been pointed out by us since ten years ago based on our some results of CeSb and CeBi. During this project term supported by this Grant-in-Aid we could discovered the several anomalous properties of these extremely low carrier substance and could get excellent good single crystal by improvement of ultra high temperature furnace, which is described in detail in paper 1). The Heavy Fermion state in low carrier have found out to be classified as following ;
1) Heavy Fermion state with no reduction full magnetic moment in magnetic order : CeBi, CeSb, CeAs, CeP (ref 2 ー ref 11)
2) Heavy Fermion state with substantial reduction magnetic moment in magnetic order : YbP, YbAs (ref 12 - ref 15)
3) Heavy Fermion state without any magnetic order : Yb_4As_3 (ref 16 - ref 24)
4) Heavy Fermion state without free carrier
a) without magnetic order Sm_3Se_4
b) with magnetic order Sm_3Te_4
|
