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- W2270983911 abstract "Abstract α-Fe2O3 nanofilms were grown within the 0.6 nm width nanochannels of sodium fluorophlogopite mica (Na-4 mica) structure. Due to a large difference in the values of thermal expansion coefficients of Na-4 mica and α-Fe2O3 a huge compressive stress was generated on the latter as the composite was cooled from 1023 K to 300 K. Magnetization measurements on the composite as a function of temperature showed the presence of piezomagnetic effect in α-Fe2O3. The values of piezomagnetic coefficient were estimated to be in the range 2.3 × 10−6 to 3.4 × 10−4 emu / g kg / cm 2 . This is of the same order as that reported earlier by work carried out on single crystals of macrodimensions. Magnetization measurements of α-Fe2O3 particles of diameter ~130 nm on the other hand, showed the usual behaviour viz., a magnetic phase transition from antiferromagnetic to ferromagnetic state at 237 K." @default.
- W2270983911 created "2016-06-24" @default.
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- W2270983911 date "2016-03-01" @default.
- W2270983911 modified "2023-09-24" @default.
- W2270983911 title "Piezomagnetic behaviour in α-Fe2O3 nanofilms grown within nanochannels of Na-4 mica" @default.
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- W2270983911 doi "https://doi.org/10.1016/j.jmmm.2015.11.049" @default.
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