Abstract: A direct link between band structure and the ballistic transport property of full-Heusler alloys based
Co2YZ/Al/Co2YZ trilayers (Y = Sc, Ti, V, Cr, Mn and Fe; Z = Al, Si and Ge) has been studied by firstprinciples
calculations. It is found that the transport efficiency is determined primarily by three factors related
to band structure: the shape of the band crossing Fermi energy EF, the distance d of the two intersection points
of Co2YZ and Al at EF, and the absolute maximum of the energy lying in the EF-crossing band, |Emax|. The
transmission coefficient distribution patterns imply that the affected factor of magneto-resistance (MR) ratio is
attributed to the band features around EF. In general, an intuitively illustrated diagram is proposed to clarify
the relationship between the probability of electron transition and the current magnitude.
LI Yang (李杨)
. Electronic Structures and Magneto-Transport Properties of Co-Based Heusler Alloy Based Magneto-Resistance Junctions[J]. Journal of Shanghai Jiaotong University(Science), 2017
, 22(5)
: 530
-535
.
DOI: 10.1007/s12204-017-1872-y
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