Dependence of spin-dependent transport signals on measurement frequency in CoFe/MgO/ n+-Si junctions

T. Inokuchi, M. Ishikawa, H. Sugiyama, Y. Saito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Highly efficient electrical spin injection and detection between ferromagnetic electrodes and semiconductors are important technologies for semiconductor-based spintronic devices, such as spin-MOSFETs. In an ideal system, the efficiency of spin injection and detection in a ferromagnetic metal/tunnel barrier/semiconductor junction depends on the spin polarization of the ferromagnetic metal, the spin filtering efficiency of the tunnel barrier, and the conductivity matching condition. However, other complex mechanisms affect spin-dependent transport in real junctions. It has been pointed out that a sequential tunneling process through localized states at an interface of a junction affect an amplitude and a width of Hanle signal so that the calculated spin lifetime are affected by effects of localized states [1-4]. Recently, the effects of these localized states were directly investigated by inelastic electron tunneling spectroscopy (IETS) [5-7]. The purpose of this study is to reveal relationship between the localized states and the spin-dependent transport properties in more detail by means of dependence of the differential conductance and IET signals on the measurement frequency.

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479973224
DOIs
Publication statusPublished - 2015 Jul 14
Externally publishedYes
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: 2015 May 112015 May 15

Publication series

Name2015 IEEE International Magnetics Conference, INTERMAG 2015

Other

Other2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period15/5/1115/5/15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Surfaces, Coatings and Films

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