Direct evidence of spin filtering across MnFe$_2$O$_4$ tunnel barrier by Meservey-Tedrow experiment - Archive ouverte HAL Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2013

Direct evidence of spin filtering across MnFe$_2$O$_4$ tunnel barrier by Meservey-Tedrow experiment

(1) , (1) , (2) , (3, 2)
1
2
3

Abstract

A spin filtering effect has been evidenced in epitaxial MnFe$_2$O$_4$ tunnel barriers directly by Meservey-Tedrow experiments. The asymmetry of the Zeeman-split tunneling conductance curves of the superconducting Al spin analyzer in Pt(111)/MnFe$_2$O$_4$(111)/$\gamma$-Al$_2$O$_3$(111)/Al tunnel junctions revealed a positive spin-polarization (up to + 9%), proving the potential of manganese ferrite for generation of a spin-polarized current. A negatively polarized spin filtering being expected theoretically, different mechanisms are discussed to explain both sign and amplitude of the measured spin-polarization.
Fichier principal
Vignette du fichier
PhysRevB.87.184422.pdf (372.76 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

cea-01481041 , version 1 (02-03-2017)

Identifiers

Cite

S. Matzen, J.-B. Moussy, G. X. Miao, J. S. Moodera. Direct evidence of spin filtering across MnFe$_2$O$_4$ tunnel barrier by Meservey-Tedrow experiment. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 87, pp.184422. ⟨10.1103/PhysRevB.87.184422⟩. ⟨cea-01481041⟩

Collections

CEA
40 View
117 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More