Direct observation of magnetic contrast obtained by photoemission electron microscopy with deep ultra-violet laser excitation.
Ultramicroscopy
; 202: 156-162, 2019 Jul.
Article
en En
| MEDLINE
| ID: mdl-31063898
ABSTRACT
Magnetic circular dichroism (MCD) and magnetic linear dichroism (MLD) have been investigated in a photoemission electron microscopy (PEEM) system excited by a deep ultra-violet (DUV) laser (with λâ¯=â¯177.3â¯nm and hυâ¯=â¯7.0â¯eV) for the first time. High resolution PEEM magnetic images (down to 43.2â¯nm) were directly obtained on a (001)-oriented magnetic FePt film surface with a circularly-polarized light under normal incidence. Furthermore, a stepped Cr seeding layer was applied to induce the formation of large-area epitaxial FePt films with (001) and (111) two orientations, where MLD with large asymmetry was observed in the transition area of two phases. It demonstrates that DUV laser can be a powerful source for high resolution magnetic imaging in the laboratory in absence of synchrotron facilities.
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MEDLINE
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En
Revista:
Ultramicroscopy
Año:
2019
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Article
País de afiliación:
China