Magnetic-optical methods are used to investigate the magnetic microstructure of an epitaxial film of (Lu,Bi) substituted rare earth iron garnet. In particular, we focused our study on a bi-dimensional domain configuration, the Néel spike, which is induced and pinned at defects inside the sample or at its edges. Imaging of magnetic domains and domain-walls is obtained by direct magneto-optical interaction in the sample under study. The visualization of the stray-field distribution that is generated by single domain-walls is achieved by means of magneto-optical imaging with an indicator film. Furthermore, magnetostatic calculations were per- formed in order to correlate the net magnetic charge of the Néel spike domain and domain-walls with the measured stray-field. It results that the measured magnetic field intensity nearby the Néel spike tip is compatible with a Bloch-to-Néel wall transition.

Visualization of stray-field distribution by charged domain-walls in rare-earth substituted iron garnets / Napolitano, A.; Ragusa, C.; Guastella, S.; Musumeci, S.; Rivolo, P.; Laviano, Francesco. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - STAMPA. - 504:(2020), p. 166556. [10.1016/j.jmmm.2020.166556]

Visualization of stray-field distribution by charged domain-walls in rare-earth substituted iron garnets

Napolitano, A.;Ragusa, C.;Guastella, S.;Musumeci, S.;Rivolo, P.;Laviano, Francesco
2020

Abstract

Magnetic-optical methods are used to investigate the magnetic microstructure of an epitaxial film of (Lu,Bi) substituted rare earth iron garnet. In particular, we focused our study on a bi-dimensional domain configuration, the Néel spike, which is induced and pinned at defects inside the sample or at its edges. Imaging of magnetic domains and domain-walls is obtained by direct magneto-optical interaction in the sample under study. The visualization of the stray-field distribution that is generated by single domain-walls is achieved by means of magneto-optical imaging with an indicator film. Furthermore, magnetostatic calculations were per- formed in order to correlate the net magnetic charge of the Néel spike domain and domain-walls with the measured stray-field. It results that the measured magnetic field intensity nearby the Néel spike tip is compatible with a Bloch-to-Néel wall transition.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/2816996