TY  - JOUR
AU  - Enkovaara, J.
AU  - Wortmann, D.
AU  - Blügel, S.
TI  - Spin-polarized tunneling between an antiferromagnet and a ferromagnet: First-principles calculations and transport theory
JO  - Physical review / B
VL  - 76
IS  - 5
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-57804
SP  - 054437
PY  - 2007
N1  - Record converted from VDB: 12.11.2012
AB  - By combining first-principles calculations with transport theory we investigate the origin of the magnetoresistance of a magnetic tunnel junction consisting of a ferromagnetic and an antiferromagnetic lead. The (001) oriented Fe/vacuum/Cr planar junction serves as model junction. Even though the conduction electrons of antiferromagnetic Cr are spin-degenerate, it is possible to observe magnetoresistance due to two mechanisms: Firstly, the surface magnetism of Cr creates a spin-dependent potential barrier, and secondly, exchange-split surface states and resonances result in a tunneling conductance which depends on the relative orientation of the Fe and Cr magnetizations. Spin-dependent tunneling between a ferromagnet and an antiferromagnet happens frequently in tunneling setups such as in spin-polarized scanning tunneling microscopy or magnetic tunnel junctions for magnetic random access memory.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000249155100108
DO  - DOI:10.1103/PhysRevB.76.054437
UR  - https://juser.fz-juelich.de/record/57804
ER  -