Influence of powerful laser irradiation on electromagneto-optical dependences of yttrium iron garnets

Abstract

Electromagneto-optical properties of yttrium iron garnets have been investigated in a longitudinal geometry by using optical polarimetry method. It is revealed that irradiation of yttrium iron garnet films by powerful laser impulse leads to essential increase in the electromagneto-optical effect value, which can be due to the elimination of the local mechanical strain or nonuniform pressure in them.

Electromagneto-Optical Scanning of the Magnetic Domains Local Areas of Bismuth-Substituted Yttrium Iron Garnets

“…Occurrence of linear on the electric field component of EMO signal in some points of a film (Figure 2), in our opinion, has a following explanation. In our earlier studies, only square-law on the electric field EMOE was observed in separate areas of YIG and bismuth-substituted YIG films (without additional external influence on the sample) [8][9][10]. The MEE and EMOE that are linearly dependent on the electric field are forbidden for the centrosymmetric cubic crystal structure of garnets and only a square-law on the electric field effect is possible [13].…”

“…After experimentally founding by O'Dell of the magneto-electric effect (MEE) in YIG [7] (MEE-the effect of change of a magnetic state in a solid under the action of an external electric field) the active researches of magneto-electric properties of this ferrimagnetic have begun. In our earlier investigations, MEE in YIG films was studied with using the optical polarimetry method [8][9][10].…”

Local magneto‐electric effects from separate areas of magnetic domains of yttrium iron garnets

“…In our earlier studies, EMOE was observed in YIG epitaxial films 9, 12, 13. Our experimental techniques as combination of a high‐sensitive laser polarimeter and a polarizing microscope with scanning diaphragm in details described in Ref.…”