Role of electrodes materials in determining the interfacial and magnetoelectric properties in BaTiO3-based multiferroic tunnel junctions

The role of the metal-oxide interface in determining the spin polarization of electrons tunneling from or into ferromagnetic transition metals in magnetic tunnel junctions is reported. The spin polarization of cobalt in tunnel junctions with an alumina barrier is positive, but it is negative when the barrier is strontium titanate or cerium lanthanite. The results are ascribed to bonding effects at the transition metal–barrier interface. The influence of the electronic structure of metal-oxide interfaces on the spin polarization raises interesting fundamental problems and opens new ways to optimize the magnetoresistance of tunnel junctions.

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Cavity Plasmonics in Tunnel Junctions: Outcoupling and the Role of Surface Roughness

Physical Review Applied ◽

10.1103/physrevapplied.14.044021 ◽

2020 ◽

Vol 14 (4) ◽

Author(s):

Thorin J. Duffin ◽

Vijith Kalathingal ◽

Andreea Radulescu ◽

Changjian Li ◽

Stephen J. Pennycook ◽

...

Keyword(s):

Surface Roughness ◽

Tunnel Junctions

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Role of secondary electrons in hot-electron femtochemistry at surfaces using tunnel junctions

Journal of Vacuum Science & Technology A Vacuum Surfaces and Films ◽

10.1116/1.580573 ◽

1997 ◽

Vol 15 (3) ◽

pp. 1520-1525 ◽

Cited By ~ 13

Author(s):

J. W. Gadzuk

Keyword(s):

Tunnel Junctions ◽

Hot Electron ◽

Secondary Electrons

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The role of ion-beam cleaning in the growth of strained-layer epitaxial thin transition metal films

Journal of Materials Research ◽

10.1557/jmr.1987.0446 ◽

1987 ◽

Vol 2 (4) ◽

pp. 446-455 ◽

Cited By ~ 16

Author(s):

Sung I. Park ◽

A. Marshall ◽

R. H. Hammond ◽

T. H. Geballe ◽

J. Talvacchio

Keyword(s):

Tunnel Junctions ◽

Ion Beam ◽

Surface Damage ◽

Metal Films ◽

Strained Layer ◽

Transmission Electron ◽

Lattice Matched

Low-energy ion-beam cleaning of the substrates prior to a deposition greatly enhances the quality of ultrathin (< 100 Å) refractory superconducting (Nb, V) films. Using this technique Nb films as thin as 7 Å have been grown, from which good tunnel junctions have been fabricated. Both the native films and the tunnel junctions are sturdy and can be thermally recycled without any degradation. In-situ surface study along with transmission electron microscopy (TEM) results suggest the removal of the carbon atoms from the surface of the substrate without an apparent surface damage as the causes of the improvement. The TEM results indicate that the Nb films grow perfectly lattice matched to the sapphire substrate when the substrate is ion-beam cleaned. This strained-layer epitaxy is observed up to 40 Å, the maximum thickness investigated through TEM.

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Role of interfacial roughness on bias-dependent magnetoresistance and transport properties in magnetic tunnel junctions

Journal of Applied Physics ◽

10.1063/1.2132096 ◽

2005 ◽

Vol 98 (10) ◽

pp. 103504 ◽

Cited By ~ 5

Author(s):

J. C. A. Huang ◽

C. Y. Hsu ◽

Y. F. Liao ◽

M. Z. Lin ◽

C. H. Lee

Keyword(s):

Transport Properties ◽

Tunnel Junctions ◽

Magnetic Tunnel Junctions ◽

Interfacial Roughness

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Role of rare earth ions in the magnetic, magnetocaloric and magnetoelectric properties of RCrO3 (R = Dy, Nd, Tb, Er) crystals

Journal of Materials Chemistry C ◽

10.1039/c6tc03989h ◽

2016 ◽

Vol 4 (47) ◽

pp. 11198-11204 ◽

Cited By ~ 36

Author(s):

L. H. Yin ◽

J. Yang ◽

P. Tong ◽

X. Luo ◽

C. B. Park ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Ions ◽

Magnetoelectric Effects ◽

Magnetoelectric Properties

H-induced stair-like metamagnetic transitions, large magnetocaloric and magnetoelectric effects related to the 4f electrons of rare-earth ions were revealed in chromite crystals.

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