Abstract

An abrupt hysteretic change in bubble size as a function of bias field has been observed in garnet films grown by chemical vapor deposition (CVD). Similar bistable bubbles and their associated transformations have now been observed in double-layer films grown by liquid-phase epitaxy (LPE). A slight compositional variation from layer to layer was introduced. Single-layer LPE films similar to CVD films reported earlier did not display these bistable bubbles. Compositional variations are postulated as the cause of the bistable bubbles, rather than strain variation as previously suggested.

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