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Magnetic Semiconductor corps.

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Presentation on theme: "Magnetic Semiconductor corps."— Presentation transcript:

1 Magnetic Semiconductor corps.
       2003/ 11/ 22 H. Yuasa K. Minami J. Jogo (in USA) T. Nagatsuka Dr. V. Smirnov

2 Purpose ・GaAs基板上にCd1-xMnxGeP2薄膜の作製 (室温で強磁性を示すものとしては世界初の薄膜!!)
Sato Lab. Purpose ・GaAs基板上にCd1-xMnxGeP2薄膜の作製 (室温で強磁性を示すものとしては世界初の薄膜!!) GaAs substrate Cd1-xMnxGeP2 (0≦x ≦1) GaAs substrate CdGeP2 (x=0) Cd 班 MnGeP2 (x=1) Mn 班

3 MBE Sato Lab. Pump C.C gauge Growth temperature Base pressure
3.0×10-10 Torr Mn:450~550℃ Cd:200℃前後 Substrate Flux monitor REED Screen TBP (Gas) Cd Mn Ge (Solid)

4 EDX (Mn) Mn Ge P 0.99 1.00 2.67

5 EDX (Cd) Cd Ge P 0.68 1.00 2.62

6 XRD (Mn) ??? MnP? MnGe?

7 XRD (Cd) ???

8 Plan ・ XRDのデータ解析    (リートベルト解析) ・ 基板の影響(InP…) ・ ラマン分光測定,TEM ・ 組成比

9 おわり

10 Mn:Ge:P Growth temperature Deposition time 0.85:1.00:1.05 450℃ 150 min
0.81:1.00:1.11 550℃ 90 min 1.11:1.00:1.17 415℃ 180 min 0.99:1.00:1.17 500℃ 120 min 1.72:1.00:2.99


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