This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/0953-8984/26/39/394004 in citations.
Local tunnel magnetoresistance of an iron intercalated graphene-based heterostructure
Local tunnel magnetoresistance of an iron intercalated graphene-based heterostructure
The lateral variation of the tunnel magnetoresistance (TMR) of a graphene-based vertical heterostructure is studied by spin-polarized scanning tunneling microscopy (SP–STM) using an Fe-coated probe tip. The well-defined heterostructure is obtained by the intercalation of a magnetic Fe monolayer at t...
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Personal Name(s): | Decker, R. (Corresponding Author) |
---|---|
Bazarnik, M. / Atodiresei, N. / Caciuc, V. / Blügel, S. / Wiesendanger, R. | |
Contributing Institute: |
Quanten-Theorie der Materialien; IAS-1 Quanten-Theorie der Materialien; PGI-1 |
Published in: | Journal of physics / Condensed matter, 26 (2014) 39, S. 394004 |
Imprint: |
Bristol
IOP Publ.
2014
|
DOI: |
10.1088/0953-8984/26/39/394004 |
Document Type: |
Journal Article |
Research Program: |
Spin-based and quantum information |
Publikationsportal JuSER |
The lateral variation of the tunnel magnetoresistance (TMR) of a graphene-based vertical heterostructure is studied by spin-polarized scanning tunneling microscopy (SP–STM) using an Fe-coated probe tip. The well-defined heterostructure is obtained by the intercalation of a magnetic Fe monolayer at the graphene/Ir(1 1 1) interface. Its structure is characterized by a moiré pattern with a high corrugation. In contrast to the Fe / Ir(1 1 1) surface, graphene/Fe / Ir(1 1 1) exhibits ferromagnetic order with an out-of-plane easy magnetization axis. At the nanometer scale, our experiments reveal that the moiré pattern induces a lateral variation of the TMR, which reaches 80%. The measured TMR at valleys of the moiré pattern is higher than at hills. We interpret this modulation in terms of a different hybridization between graphene and Fe at valleys and hills due to a different graphene–Fe distance at these sites, which leads to a different transmission of spin-polarized states |