Morphology and Curie Temperature Changes upon Annealing of Co/W(110)

1997 ◽  
Vol 475 ◽  
Author(s):  
A. Bauer ◽  
A. Mühlig ◽  
T. Günther ◽  
M. Farle ◽  
K. Baberschke ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Ultrathin Films ◽  
Kerr Effect ◽  
Room Temperature ◽  
The Other ◽  
Scanning Tunneling ◽  
Optical Kerr Effect ◽  
Tunneling Microscopy ◽  
Temperature Changes ◽  
Magneto Optical Kerr Effect

ABSTRACTAnnealing of CoAV(110) ultrathin films causes rather strong changes of film morphology and magnetic properties, which has been studied by scanning tunneling microscopy (STM) and alternating-current magneto-optical Kerr effect (ac-MOKE). Annealing above 500 K of room-temperature grown 2 monolayers (ML) thick Co/W(110) films leads to the formation of islands and a decrease of the Curie temperature 7C. At 4 ML, on the other hand, a network of interconnected islands is formed upon annealing, resulting in an enhanced TC. While the increase of TC at 4 ML is explained by an increase of the local film thickness, the anomalous TC behavior at 2 ML is assigned to the occurrence of superparamagnetism.

Spin Reorientation in Fe/Cu(100) and Cu/Fe/Cu(100)

1997 ◽  
Vol 475 ◽  
Author(s):  
E. Mentz ◽  
A. Bauer ◽  
D. Weiss ◽  
G. Kaindl
Keyword(s):  
Low Temperature ◽  
Kerr Effect ◽  
Spin Reorientation ◽  
Scanning Tunneling ◽  
Optical Kerr Effect ◽  
Tunneling Microscopy ◽  
Structure Morphology ◽  
Out Of Plane ◽  
Magneto Optical Kerr Effect

ABSTRACTIn-situ scanning tunneling microscopy (STM). magneto-optical Kerr effect (MOKE) and Kerr microscopy are used to investigate the relations between structure, morphology, and magnetism in low-temperature (LT) grown Fe/Cu(100) films. At the spin reorientation thickness of ≈ 3.8 monolayers (ML) Fe/Cu(100) the coexistence of in-plane and out-of-plane magnetized domains is observed. For Fe thicknesses between 3.8 and 6 ML Fe/Cu(100). an irreversible spin reorientation from in-plane to out-of-plane can be induced by annealing up to 420 K. Annealing of LT-grown Fe/Cu(100) films is proposed to provide smooth surfaces for Cu/Fe/Cu(100) sandwich preparations.

Large room-temperature magneto-optical Kerr effect in CuCr2Se4−xBrx (x = 0 and 0.3)

1991 ◽  
Vol 93 ◽  
pp. 207-210 ◽  
Author(s):  
H. Brändle ◽  
J. Schoenes ◽  
P. Wachter ◽  
F. Hulliger ◽  
W. Reim
Keyword(s):  
Kerr Effect ◽  
Room Temperature ◽  
Optical Kerr Effect ◽  
Magneto Optical Kerr Effect

scholarly journals Room-temperature ultrafast carrier and spin dynamics in GaAs probed by the photoinduced magneto-optical Kerr effect

2001 ◽  
Vol 63 (23) ◽  
Author(s):  
A. V. Kimel ◽  
F. Bentivegna ◽  
V. N. Gridnev ◽  
V. V. Pavlov ◽  
R. V. Pisarev ◽  
...  
Keyword(s):  
Kerr Effect ◽  
Room Temperature ◽  
Spin Dynamics ◽  
Optical Kerr Effect ◽  
Ultrafast Carrier ◽  
Magneto Optical Kerr Effect

The measurement of magneto-optical Kerr effect of ultrathin films in a pulsed magnetic field

Measurement ◽  
2013 ◽  
Vol 46 (1) ◽  
pp. 52-56 ◽  
Author(s):  
Xi Chen ◽  
Xuan Qian ◽  
Kangkang Meng ◽  
Jianhua Zhao ◽  
Yang Ji
Keyword(s):  
Magnetic Field ◽  
Ultrathin Films ◽  
Kerr Effect ◽  
Pulsed Magnetic Field ◽  
Optical Kerr Effect ◽  
Magneto Optical Kerr Effect

BEHAVIOR OF STEP EDGES ON Si(001)

1993 ◽  
Vol 07 (24n25) ◽  
pp. 1547-1566 ◽  
Author(s):  
H.J.W. ZANDVLIET ◽  
H.B. ELSWIJK
Keyword(s):  
Room Temperature ◽  
Step Edge ◽  
The Other ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Step Step ◽  
Formation Energies ◽  
Stm Images ◽  
Miscut Angle ◽  
Step Edges

The morphology of monatomic step edges on vicinal Si (001) surfaces is briefly reviewed. With increasing miscut angle, the Si (001) surface exhibits an interesting sequence of phase transitions. For a miscut angle smaller than about 0.03°, a hilly structure with step loops is found, whereas a phase of wavy steps coexisting with a phase of straight steps is observed in the range of 0.03°–0.1°. If the miscut angle lies in the range of 0.1° up to about 3°, two types, one much straighter than the other, of monatomic step edges develop. For even larger miscut angles, a phase of straight biatomic step edges is found. The fundamental energetic parameters, like kink formation energies, step edge energies and step-step interactions, which govern the thermodynamic behavior are determined using Scanning Tunneling Microscopy (STM) images of 0.5° misoriented Si (001). Despite the weak strength of energetic and entropic step-step interactions as compared to the interactions along the step edge, i.e. the kink formation and step edge energies, they have a profound effect on the meandering of the step edges. Both entropic and energetic step-step interactions are proportional to L−2 (where L is the average terrace length). The behavior of the step edges at temperatures above room temperature will be addressed with the aid of a high-temperature STM. The freeze-out temperature, T f , of the monatomic step edges is estimated to be higher than 600–700 K. The temperature T f is significantly above the roughening temperature, Tr, of the step edges. This means that at room temperature, the monatomic step edges on vicinal Si (001) are always rough.

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