## 抄録

Correlation between the amplitude of the spin accumulation signals and the effective barrier height estimated from the slope of the log (RA) - t_{MgO} plot (RA: resistance area product, t_{MgO}: thickness of MgO tunnel barrier) in CoFe/MgO/n^{+}-Si junctions was investigated. The amplitude of spin accumulation signals increases with increasing effective barrier heights. This increase of the amplitude of spin accumulation is originated from the increase of the spin polarization (P S i) in Si. The estimated absolute values of P S i using three-terminal Hanle signals are consistent with those estimated by four-terminal nonlocal-magnetoresistance (MR) and two-terminal local-MR. To demonstrate large spin accumulation in Si bulk band and enhance the local-MR through Si channel, these results indicate that the increase of the effective barrier height at ferromagnet/(tunnel barrier)/n^{+}-Si junction electrode is important.

本文言語 | 英語 |
---|---|

論文番号 | 17C707 |

ジャーナル | Journal of Applied Physics |

巻 | 117 |

号 | 17 |

DOI | |

出版ステータス | 出版済み - 7 5月 2015 |

外部発表 | はい |

## フィンガープリント

「Correlation between amplitude of spin accumulation signals investigated by Hanle effect measurement and effective junction barrier height in CoFe/MgO/n^{+}-Si junctions」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。