scholarly journals Determination of spin-polarized quantum well states and spin-split energy dispersions of Co ultrathin films grown on Mo(110)

2011 ◽  
Vol 83 (11) ◽  
Author(s):  
J. S. Park ◽  
A. Quesada ◽  
Y. Meng ◽  
J. Li ◽  
E. Jin ◽  
...  
Keyword(s):  
Quantum Well ◽  
Ultrathin Films ◽  
Spin Polarized ◽  
Quantum Well States

Quantum well States in Fe (100) Ultrathin Films Observed by Magneto-Optical Effect

1993 ◽  
Vol 313 ◽  
Author(s):  
Yoshishige Suzuki ◽  
Toshikazu Katayama
Keyword(s):  
Quantum Well ◽  
Ultrathin Films ◽  
Oscillation Period ◽  
Interlayer Thickness ◽  
Kerr Rotation ◽  
Magnetic Layers ◽  
Ultrathin Layers ◽  
Spin Polarized ◽  
Magneto Optical Effect ◽  
Quantum Well States

ABSTRACTWe report on the Magneto-optical Kerr rotation (<φ>K) spectra of ultrathin Fe films on Au or Ag (100) substrates and the φK oscillation due to interlayer thickness in Fe/Au/Fe sandwich films. In 3.5–4.5 eV, a new φK peak appears in the bcc-Fe (100) ultrathin films on the fcc-Au (100) surface and it shifts towards the higher energy side with increasing Fe layer thickness. The absolute value of eXy for 3Å (2ML) thick Fe layers is twice as large as that of bulk Fe at 3.7 eV. The thickness dependence of the transition energy of this new peak in the spectra is well explained by the concept of quantum well states in the Fe ultrathin layers, attributing the new transition to a transition from the majority spin Δ5 band ({px±i py), {dxz±i dyZ}; M=±l) to the Δ1 quantum well states (s, pz, dz2; M=0). The new peak is also observed in the Fe/Au (100) artificial superlattices. Using the εxy obtained experimentally for the Fe ultrathin films and the εxy of literature, we can reproduce the experimental φK spectra of the artificial superlattices by optical calculation. On the other hand, we cannot observe the same behavior for the ultrathin Fe films grown on a fcc-Ag (100) surface and covered by a Au (100) ultrathin film, although the εXy of Fe is different from that of the bulk and shows some structures in 2–3 eV. These structures around 2.5 eV are thought to be due to polarized Au atoms adjacent to an Fe layer.An oscillation of φK as a function of interlayer thickness, d, was observed in photon energy region between about 2.5 and 3.8 eV for the Fe (6Å) /Au (dÅ) /Fe (6A) sandwiched film. The oscillation period was about 10Å (5ML) of Au. The oscillation is thought to be closely related with a formation of spin polarized quantum well states of Δ1 band in Au layers sandwiched by magnetic layers.

Magneto-optical-Kerr-effect study of spin-polarized quantum-well states in a Au overlayer on a Co(0001) ultrathin film

1995 ◽  
Vol 51 (8) ◽  
pp. 5586-5589 ◽  
Author(s):  
R. Mégy ◽  
A. Bounouh ◽  
Y. Suzuki ◽  
P. Beauvillain ◽  
P. Bruno ◽  
...  
Keyword(s):  
Quantum Well ◽  
Kerr Effect ◽  
Effect Study ◽  
Ultrathin Film ◽  
Optical Kerr Effect ◽  
Spin Polarized ◽  
Magneto Optical Kerr Effect ◽  
Quantum Well States

Determination of the Magnetic Coupling in the Co/Cu/Co(100) System with Momentum-Resolved Quantum Well States

1999 ◽  
Vol 82 (20) ◽  
pp. 4098-4101 ◽  
Author(s):  
R. K. Kawakami ◽  
E. Rotenberg ◽  
Ernesto J. Escorcia-Aparicio ◽  
Hyuk J. Choi ◽  
J. H. Wolfe ◽  
...  
Keyword(s):  
Quantum Well ◽  
Magnetic Coupling ◽  
Quantum Well States

Short wavelength, spin-polarized quantum-well states in high quality Cu films on FCC-Co(100)

1999 ◽  
Vol 203 (1-3) ◽  
pp. 126-128 ◽  
Author(s):  
J.E. Ortega ◽  
A. Närmann ◽  
K.N. Altmann ◽  
W. O'Brien ◽  
D.J. Seo ◽  
...  
Keyword(s):  
Quantum Well ◽  
Short Wavelength ◽  
High Quality ◽  
Cu Films ◽  
Spin Polarized ◽  
Quantum Well States

Angle Resolved Photoemission from Ultrathin Films of Cu/Ni(001)

1996 ◽  
Vol 427 ◽  
Author(s):  
K. Subramanian ◽  
G. J. Mankey ◽  
R. L. Stockbauer ◽  
R. L. Kurtz
Keyword(s):  
Quantum Well ◽  
Fermi Level ◽  
Ultrathin Films ◽  
Angular Distributions ◽  
Recent Past ◽  
Quantum Well States ◽  
Photoelectron Angular Distributions ◽  
Zone Edge

AbstractWe present a study of the quantum well states observed in Cu/Ni(001). Several reports in the recent past have shown that these states, which are derived from the bulk, disperse through the Fermi level at a thickness of about 6 ML. Using angle-resolved photoemission, we have imaged the photoelectron angular distributions from several thicknesses of Cu/Ni(001). We observe that these states have s,p like symmetry and are located near the zone edge.

Electronic States in Magnetic Quantum Wells

1993 ◽  
Vol 313 ◽  
Author(s):  
J. E. Ortega ◽  
F. J. Himpsel ◽  
G. J. Mankey ◽  
R. F. Willis
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Strong Evidence ◽  
Noble Metals ◽  
Electronic States ◽  
Magnetic Coupling ◽  
Spin Polarized ◽  
Quantum Well States

ABSTRACTWe have searched for the electronic states that mediate oscillatory magnetic coupling in superlattices, and have found strong evidence that these are quantum well states, which are created by quantizing the momentum of s,p-band states perpendicular to the interfaces. The quantum well picture also explains how quantum well states in noble metals become spin-polarized, due to a spin-dependent electron reflectivity at the interface with the ferromagnet. The resulting implications for magnetoresistance are discussed.

scholarly journals Theory for Spin-Polarized Oscillations in Nonlinear Optics due to Quantum Well States

1996 ◽  
Vol 77 (13) ◽  
pp. 2810-2813 ◽  
Author(s):  
T. A. Luce ◽  
W. Hübner ◽  
K. H. Bennemann
Keyword(s):  
Nonlinear Optics ◽  
Quantum Well ◽  
Spin Polarized ◽  
Quantum Well States
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