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• W2003776872 abstract "The crystal structure and magnetic properties of BiFeO3 samples, proton-irradiated with 0, 10, and 20 pC/μm2, were investigated with x-ray diffraction (XRD), vibrating sample magnetometer, and Mössbauer spectroscopy measurements. From the Rietveld refinement analysis of the XRD patterns, the crystal structure of BiFeO3 is determined to be rhombohedral with the space group of R3c. We have observed the decrease in the lattice constant and oxygen occupancy with proton irradiation. The magnetization hysteresis (M-H) curves show the appearance of the weak ferromagnetic behavior in the proton irradiated BiFeO3 samples. The Mössbauer spectra of proton irradiated BiFeO3 samples at 295 K were analyzed with two-sextets (B1 and B2) and doublet. From the isomer shift (δ) values, ionic states were determined to be Fe3+. Compared to non-irradiated sample, having the antiferromagnetic area ratio (two-sextets) of 45.47, 54.53% the antiferromagnetic and paramagnetic area ratios (doublet) of 10 and 20 pC/μm2 proton irradiated BiFeO3 samples are 41.36, 51.26, and 7.38% and 41.03, 50.90, and 8.07%, respectively. Our experimental observation suggests that the increase in the paramagnetic area ratio is due to the disappearance of superexchange interaction, resulted from the removal of the oxygen with proton irradiation. Also, the appearance of the weak ferromagnetic behavior is caused by the breaking of the antiferromagnetic coupling." @default.
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• W2003776872 date "2013-04-15" @default.
• W2003776872 modified "2023-09-29" @default.
• W2003776872 title "Magnetic properties of proton irradiated BiFeO3" @default.
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• W2003776872 doi "https://doi.org/10.1063/1.4795616" @default.
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