Properties of Exchange Coupled All-garnet Magneto-Optic Thin Film Multilayer Structures.

Authors :: Nur-E-Alam M
Vasiliev M
Kotov VA
Balabanov D
Akimov I
Alameh K
Source :: Materials (Basel, Switzerland) [Materials (Basel)] 2015 Apr 21; Vol. 8 (4), pp. 1976-1992. Date of Electronic Publication: 2015 Apr 21.
Publication Year :: 2015
Abstract: The effects of exchange coupling on magnetic switching properties of all-garnet multilayer thin film structures are investigated. All-garnet structures are fabricated by sandwiching a magneto-soft material of composition type Bi <subscript>1.8</subscript> Lu <subscript>1.2</subscript> Fe <subscript>3.6</subscript> Al <subscript>1.4</subscript> O <subscript>12</subscript> or Bi₃Fe₅O <subscript>12</subscript> :Dy₂O₃ in between two magneto-hard garnet material layers of composition type Bi₂Dy₁Fe₄Ga₁O <subscript>12</subscript> or Bi₂Dy₁Fe₄Ga₁O <subscript>12</subscript> :Bi₂O₃. The fabricated RF magnetron sputtered exchange-coupled all-garnet multilayers demonstrate a very attractive combination of magnetic properties, and are of interest for emerging applications in optical sensors and isolators, ultrafast nanophotonics and magneto-plasmonics. An unconventional type of magnetic hysteresis behavior not observed previously in magnetic garnet thin films is reported and discussed.

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