Spin-polarized inelastic tunneling through insulating barriers.
Spin-conserving hopping transport through chains of localized states has been evidenced by taking benefit of the high degree of spin-polarization of CoFeB-MgO-CoFeB magnetic tunnel junctions. In particular, our data show that relatively thick MgO barriers doped with boron favor the activation of spin-conserving inelastic channels through a chain of three localized states and leading to reduced magnetoresistance effects. We propose an extension of the Glazman-Matveev theory to the case of ferromagnetic reservoirs to account for spin-polarized inelastic tunneling through nonmagnetic localized states embedded in an insulating barrier.
Lu
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Y
Unité Mixte de Physique CNRS/Thales, Campus Polytechnique, 1 Avenue Augustin Fresnel, 91767 Palaiseau Cedex and Université Paris-Sud 11, 91405, Orsay, France.
Tran
M
M
Jaffrès
H
H
Seneor
P
P
Deranlot
C
C
Petroff
F
F
George
J-M
JM
Lépine
B
B
Ababou
S
S
Jézéquel
G
G