Generation of mesoscopic magnetic structures by local laser action

A. S. Logginov, A. V. Nikolaev, V. N. Onishchuk, P. A. Polyakov

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

New effects are observed wherein the internal structure of the domain walls in a thin magnetic iron garnet film are modified by the action of focused laser radiation. A single laser pulse with increasing power gives rise to the following: 1) displacement of vertical Bloch lines in a domain wall; 2) generation of a pair of vertical Bloch lines on initially line-free walls; and, 3) an irreversible change in shape of a domain wall and the domain structure as a whole. The mechanism leading to the generation and displacement of Bloch lines is connected with the motion of domain walls which is induced by a local change in the distribution of demagnetizing fields as a result of a heating-induced decrease of the magnetization in the focal spot of the laser radiation.

Original languageEnglish
Pages (from-to)426-430
Number of pages5
JournalJETP Letters
Volume66
Issue number6
DOIs
Publication statusPublished - 1997
Externally publishedYes

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