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.

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.

scholarly journals The Characteristic Loss Spectra of the Second and Third Series Transition Metals

1968 ◽  
Vol 21 (6) ◽  
pp. 811 ◽  
Author(s):  
MJ Lynch ◽  
JB Swan
Keyword(s):  
Transition Metals ◽  
Energy Loss ◽  
Electron Energy ◽  
Individual Particle ◽  
Spectral Features ◽  
Electron Energy Loss ◽  
Electron Energy Loss Spectra

Characteristic electron energy loss spectra are presented for the second and third series transition metals Y, Zr, Nb, Mo, Rh, Pd, Ag, and Hf, Ta, W, Re, Ir, Pt, Au. An identification of most of the spectral features in terms of collective and individual particle excitations is made.

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