Temperature Dependence of the Exchange Splitting in Ni Studied by Spin-Polarized Photoemission

1983 ◽  
Vol 51 (9) ◽  
pp. 829-832 ◽  
Author(s):  
H. Hopster ◽  
R. Raue ◽  
G. Güntherodt ◽  
E. Kisker ◽  
R. Clauberg ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Exchange Splitting ◽  
Spin Polarized

Temperature Dependence of the Exchange Splitting in Ferromagnetic Metals II. The Study of Stoner Excitations by the de Haas–van Alphen Effect

1974 ◽  
Vol 52 (8) ◽  
pp. 704-707 ◽  
Author(s):  
D. M. Edwards
Keyword(s):  
Temperature Dependence ◽  
Spin Wave ◽  
Itinerant Electron ◽  
Exchange Splitting ◽  
Ferromagnetic Metals

It is shown that the de Haas–van Alphen (dHvA) effect in ferromagnetic metals can give information about the Stoner T2 term in the temperature dependence of the magnetization, without interference from spin wave contributions. In particular, the temperature dependence of the dHvA frequency for a very weak itinerant electron ferromagnet could distinguish clearly between conflicting theories of these materials.

Magnetic Ordering of Mn Overlayers on Fe (100)

1993 ◽  
Vol 313 ◽  
Author(s):  
T. G. Walker ◽  
H. Hopster
Keyword(s):  
Surface Layer ◽  
Energy Loss ◽  
Magnetic Moment ◽  
Magnetic State ◽  
Magnetic Ordering ◽  
Spectral Features ◽  
Exchange Splitting ◽  
Magnetic Layers ◽  
Spin Polarized ◽  
Electron Energy Loss

ABSTRACTSpin polarized electron energy loss spectroscopy (SPEELS) was used to probe the magnetic state of mn over layers on Fe (100). Nonzero exchange asymmetries are measured and found to oscillate with a two monolayer period as the mn overlayer thickness is varied, proving that the surface layer of the mn overlayers has a net magnetic moment and that these (100) Magnetic layers are aligned antiferromagnetically. The average exchange splitting of the mn surface layer is found to be 2.9 eV, indicating that the mn surface has a magnetic moment of the order 3 μg. In addition, oxidized mn overlayer surfaces have been studied, and the spectral features in the range 0 to 6 eV energy loss can be assigned to 3d-3d transitions of Mn2+. No indication of magnetic ordering of the MnO overlayer has been oserved.

A Spin Drag Effect in Temperature Dependence of Spin-Polarized Electron Mobilities

2006 ◽  
Author(s):  
Yutaka Takahashi ◽  
Yuuki Sato ◽  
Fumihiko Hirose ◽  
Hitoshi Kawaguchi
Keyword(s):  
Temperature Dependence ◽  
Drag Effect ◽  
Spin Polarized

Linear and Circular Dichroism in Angle Resolved Fe 3p Photoemission

1994 ◽  
Vol 375 ◽  
Author(s):  
E. Tamura ◽  
G. D. Waddill ◽  
J. G. Tobin ◽  
P. A. Sterne
Keyword(s):  
Polarized Light ◽  
Exchange Splitting ◽  
Orbit Splitting ◽  
Green Function Method ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
X Ray ◽  
Spin Orbit Splitting ◽  
Magnetic Dichroism ◽  
Spin Polarized

AbstractUsing a recently developed spin-polarized, fully relativistic, multiple scattering approach based on the layer KKR Green function method, we have reproduced the Fe 3p angle-resolved soft x-ray photoemission spectra and analyzed the associated large magnetic dichroism effects for excitation with both linearly and circularly polarized light. Comparison between theory and experiment yields a spin-orbit splitting of 1.0 – 1.2 eV and an exchange splitting of 0.9 – 1.0 eV for Fe 3p. These values are 50 – 100 % larger than those hitherto obtained experimentally.

Spin-Polarized Eels on Ultrathin FCC Co Layers on CU(100)

1991 ◽  
Vol 231 ◽  
Author(s):  
K.-P. Kamper ◽  
D.L. Abraham ◽  
H. Hopster
Keyword(s):  
Electronic Structure ◽  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Remanent Magnetization ◽  
Room Temperature ◽  
Exchange Splitting ◽  
Monolayer Films ◽  
Spin Polarized ◽  
Electron Energy Loss

AbstractThe magnetism and the electronic structure of fcc Co films epitaxially grown on Cu(100) was investigated by spin polarized electron energy loss spectroscopy. Films above 2 atomic layers thickness show ferromagnetic order above room temperature with the magnetization in the plane. An exchange splitting of 0.8 eV and a Stoner gap of 300 meV is found. Films thinner than 1.6 layers do not show remanent magnetization above 80 K. No evidence for enhanced moments in monolayer films is found.

Spin Polarized Photoemission from Fe On CU(100)

1991 ◽  
Vol 231 ◽  
Author(s):  
D.P. Pappas ◽  
K.-P. KÄmper ◽  
B.P. Miller ◽  
H. Hopster ◽  
D.E. Fowler ◽  
...  
Keyword(s):  
Low Energy ◽  
Photoemission Spectroscopy ◽  
Universal Curve ◽  
Exchange Splitting ◽  
Attenuation Length ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Minority Spin ◽  
Spin Polarized ◽  
The Difference ◽  
Majority Spin

AbstractThe spin resolved electronic structure of ultra-thin Fe films on Cu(100) was investigated using spin polarized angle resolved photoemission spectroscopy. All exchange splitting of the Fe ∆s band of 2.5 eV is observed for photon energies between 20 and 30 eV. ∆ peak at 6 eV binding energy which has been previously identified as a many-electron resonance was observed only after contamination of the films with oxygen. In addition, the spin dependent attenuation lengths for electrons in Fe were measured at 11, 19, and 40 eV above Ef. The attenuation length for the minority spin electrons was found to be shorter than that of the majority spin electrons. The difference between the two attenuation lengths was shown to increase at low energy. Short attenuation lengths of ≃3 monolayer were measured at II eV. The large increase of the attenuation length at low energy which is expected from the “universal curve” is not observed in Fe.

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