Influence of Superlattice Potentials on Transport in magnetic multilayers

1993 ◽  
Vol 313 ◽  
Author(s):  
Shufeng Zhang ◽  
Peter M. Levy
Keyword(s):  
Quantum Well ◽  
Magnetic Multilayers ◽  
Multilayered Structures ◽  
Primary Origin ◽  
Spin Dependent Scattering ◽  
Quantum Well States

ABSTRACTWe discuss the effect of the superlattice potential on the magnetotransport properties of magnetic multilayers for current parallel and perpendicular to the plane of the layers. While quantum well states affect the Magnetotransport, they are not the primary origin of the giant Magnetoresistance observed in these materials for currents in the plane of the layers. In general, it is necessary to include both spin-dependent scattering and the effects of superlattice potentials in order to explain the magnetoresistance of multilayered structures.

Interface reflectivities and quantum-well states in magnetic multilayers

1998 ◽  
Vol 58 (20) ◽  
pp. 13721-13733 ◽  
Author(s):  
K. Wildberger ◽  
R. Zeller ◽  
P. H. Dederichs ◽  
J. Kudrnovský ◽  
P. Weinberger
Keyword(s):  
Quantum Well ◽  
Magnetic Multilayers ◽  
Quantum Well States

Quantum-well states and exchange coupling in fcc (111) magnetic multilayers

1994 ◽  
Vol 50 (21) ◽  
pp. 16066-16069 ◽  
Author(s):  
D. M. Edwards ◽  
J. Mathon ◽  
R. B. Muniz
Keyword(s):  
Quantum Well ◽  
Exchange Coupling ◽  
Magnetic Multilayers ◽  
Quantum Well States

Quantum-Well Contributions to the RKKY Coupling in Magnetic Multilayers

1993 ◽  
Vol 313 ◽  
Author(s):  
B. A. Jones ◽  
C. B. Hanna
Keyword(s):  
Quantum Well ◽  
Fermi Surface ◽  
Free Electron ◽  
Bound States ◽  
Finite Size ◽  
Oscillation Period ◽  
Magnetic Multilayers ◽  
Potential Well ◽  
Experimental Systems ◽  
Quantum Well States

ABSTRACTWe study the effects of quantum-well states on the calculated RKKY coupling. We find that the bound states of a finite-size potential well of depth V give an added oscillation period of size For the simplest case of a spherical free-electron Fermi surface, thus two periods appear: the original, “fast,” π/kf oscillation, and the quantum-well one The quantum-well contributions have larger amplitude, and are in fact the predominant oscillation. For physically reasonable V (tenths of an eV) this period is around 8–10Å. We discuss evidence for these effects in experimental systems.

Hybridization and the effective mass of quantum-well states in magnetic multilayers

1994 ◽  
Vol 50 (12) ◽  
pp. 8954-8956 ◽  
Author(s):  
P. D. Johnson ◽  
K. Garrison ◽  
Q. Dong ◽  
N. V. Smith ◽  
Dongqi Li ◽  
...  
Keyword(s):  
Quantum Well ◽  
Effective Mass ◽  
Magnetic Multilayers ◽  
Quantum Well States

QUANTUM WELL STATES IN METALLIC THIN LAYERS

1997 ◽  
Vol 04 (02) ◽  
pp. 361-370 ◽  
Author(s):  
J. E. ORTEGA ◽  
F. J. HIMPSEL ◽  
G. J. MANKEY ◽  
R. F. WILLIS
Keyword(s):  
Thin Film ◽  
Quantum Well ◽  
Magnetic Multilayers ◽  
Thin Layers ◽  
Bulk Solid ◽  
Quantum Well State ◽  
Spin Polarized ◽  
Photoemission Data ◽  
Oscillatory Coupling ◽  
Quantum Well States

When going from the bulk solid to a thin film of nanometer dimensions, the electronic structure becomes discretized in the perpendicular direction. These discrete states, also called thin film states and quantum well states, are clearly distinguished in photoemission experiments as two-dimensional and thickness-dependent modulations of the bulk spectra, although their observation is limited to highly perfect epitaxial systems. The photoemission data are well explained in the framework of a simple model for the electron wave function in a quantum well state. Thin film states become spin-polarized when growing on ferromagnetic substrates. Furthermore, spin-polarized, thickness-dependent modulations at a given energy lead to spin-dependent periodic oscillations of the density of states as a function of thickness, which are found to be responsible for the oscillatory coupling observed in magnetic multilayers.

Quantum Well States in Metallic Superlattices

1996 ◽  
Vol 6 (11) ◽  
pp. 1461-1467 ◽  
Author(s):  
C. Sommers ◽  
P. M. Levy
Keyword(s):  
Quantum Well ◽  
Quantum Well States
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