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- W3107333670 abstract "• An amorphous Zn-Fe-O (ZFO) layer deposited on top of a nanocrystalline magnetoelectric gallium ferrite (GFO) layer. • This bilayer film shows exchange bias and training effect below 30 K. • The exchange bias field decays exponentially with temperature. • The training effect followed the spin configurational relaxation model. • The exchange bias effect is attributed to the pinning anisotropy of the spin glass amorphous ZFO layer. In this paper, I report the exchange bias effect in a bilayer thin film of amorphous Zn-Fe-O (ZFO) and nanocrystalline GaFeO 3 (GFO). I deposited the amorphous ZFO layer on top of a nanocrystalline GFO thin film using pulsed laser ablation of a Zinc ferrite (ZnFe 2 O 4 ) target at room temperature. This bilayer film showed a large exchange bias effect (H E ∼ 418 Oe at 2 K). The exchange bias shift decreased exponentially as the temperature increased and disappeared for T > 30 K. Along with the exchange bias shift, the film also showed enhanced magnetization in Field Cooled (FC) measurements as compared to the Zero Field Cooled (ZFC) magnetization. The magnetization decreased during consecutive M-H loops cycling in training effect measurements. This decrease in the magnetization of the film followed the spin configurational relaxation model. The observed exchange bias effect can be attributed to a unidirectional anisotropy originated due to the pinning effect of the interfacial spins of the ZFO layer." @default.
- W3107333670 created "2020-12-07" @default.
- W3107333670 creator A5058224082 @default.
- W3107333670 date "2021-04-01" @default.
- W3107333670 modified "2023-10-17" @default.
- W3107333670 title "Exchange bias and training effect in an amorphous Zn-Fe-O/nanocrystalline GaFeO3 bilayer thin film" @default.
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- W3107333670 doi "https://doi.org/10.1016/j.materresbull.2020.111146" @default.
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