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- W1971207360 abstract "57Fe Mössbauer spectroscopic measurements have been conducted on CuFe1−xGaxO2 single crystals, in order to investigate the magnetic structures and hyperfine parameters in ferroelectric CuFe0.965Ga0.035O2 and paraelectric CuFeO2. We confirmed that the Mössbauer spectrum at 4.2 K in CuFeO2 is explained by the collinear antiferromagnetic structure with spins along the hexagonal c-axis. In the ferroelectric phase in CuFe0.965Ga0.035O2, the spectrum consists of three magnetic components, where magnetic hyperfine fields distribute in three different directions within the (110) plane. This configuration is not completely consistent with a simple proper screw structure with a uniform spin distribution. The quadrupole coupling constants e2qQ/2 are unexpectedly large for both specimens. In the ferroelectric state in CuFe0.965Ga0.035O2, e2qQ/2 becomes noticeably smaller than that in the paraelectric phase in CuFeO2. We discuss the difference in quadrupole coupling constant between the ferroelectric and paraelectric states in CuFe1−xGaxO2." @default.
- W1971207360 created "2016-06-24" @default.
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- W1971207360 date "2014-04-15" @default.
- W1971207360 modified "2023-10-18" @default.
- W1971207360 title "Mössbauer Study of the Ferroelectric State in Ga-Substituted CuFeO2" @default.
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- W1971207360 doi "https://doi.org/10.7566/jpsj.83.044701" @default.
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