2009 Fiscal Year Final Research Report
Spin scattering asymmetry coefficients of alternate monatomic epitaxial [Fe/Co]_n superlattices
| Project/Area Number |
19360284
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals
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| Research Institution | Tohoku University |
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Principal Investigator |
DOI Masaaki Tohoku University, 大学院・工学研究科, 准教授 (10237167)
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| Co-Investigator(Kenkyū-buntansha) |
SAHASHI Masashi 東北大学, 大学院・工学研究科, 教授 (20361123)
MIYAKE Kousaku 東北大学, 大学院・工学研究科, 助教 (20374960)
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| Project Period (FY) |
2007 – 2009
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| Keywords | エピタキシャル薄膜 / 単原子積層 / 巨大磁気抵抗効果 / CPP-GMR スピンバルブ / スピン分極率 / スピン伝導非対称パラメータ / MR 変化率 |
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| Research Abstract |
The full epitaxial stacked films with AML [Fe/Co]n/Cu or Ag/ AML [Fe/Co]n for CPP-GMR measurement were confirmed on the electrode of Au on MgO(001) substrate by the RHEED and TEM observation. We have estimated the spin asymmetry coefficient (β and γ) of the AML[Fe/Co] /Cu or Ag/AML [Fe/Co]n from the fitting of the plot of ΔRA as a function of thickness of ferromagnetic layer (tFM) by the Valet-Fert theory.The bulk asymmetry in our epitaxial SV with AML[Fe/Co] were found to be β=0.76 - 0.81. Also we achieved the interface asymmetry coefficient (γFM/NM) value of 0.81±0.03, 0.84±0.02 using Cu and Ag spacer with AML[Fe/Co]n, respectively.
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