2011
DOI: 10.1007/s10751-011-0442-1
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Mössbauer study of ε-Al x Fe2 − x O3 nanomagnets

Abstract: A series of Al 3+ -substituted ε-Fe 2 O 3 nanomagnets, ε-Al x Fe 2−x O 3 (x = 0, 0.21, 0.40), with large coercive field values was studied by 57 Fe Mössbauer spectroscopy. The hyperfine field and absorption coefficient in the Mössbauer spectra changed with x. These behaviors can be explained by the selective replacement of Fe 3+ ions with Al 3+ ions. This is the first report on the Mössbauer spectra of metalsubstituted ε-Fe 2 O 3 .

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Cited by 7 publications
(3 citation statements)
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“…Analogously to the particle size, the doping with foreign cations can significantly modify the magnetic properties of ε-Fe 2 O 3 as heavily reported elsewhere in the literature and mentioned briefly above. 24,42,46–65 As clearly seen from our results for the undoped phase (see Fig. 5a), both ZFC and FC magnetization curves, recorded under an external magnetic field of 100 and 1000 Oe, shows two significant steps, i.e.…”
Section: Resultssupporting
confidence: 67%
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“…Analogously to the particle size, the doping with foreign cations can significantly modify the magnetic properties of ε-Fe 2 O 3 as heavily reported elsewhere in the literature and mentioned briefly above. 24,42,46–65 As clearly seen from our results for the undoped phase (see Fig. 5a), both ZFC and FC magnetization curves, recorded under an external magnetic field of 100 and 1000 Oe, shows two significant steps, i.e.…”
Section: Resultssupporting
confidence: 67%
“…26 Analogously to the particle size, the doping with foreign cations can significantly modify the magnetic properties of ε-Fe 2 O 3 as heavily reported elsewhere in the literature and mentioned briefly above. 24,42,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] As clearly seen from our results for the undoped phase (see Fig. 5a), both ZFC and FC magnetization curves, recorded under an external magnetic field of 100 and 1000 Oe, shows two significant steps, i.e., one at ∼100 K and the other one at ∼140 K. These steps are signatures of a broad magnetic transition, typical of ε-Fe 2 O 3 , indicating a passage from a collinear ferrimagnetic state to a regime with features of an incommensurate magnetic structure.…”
Section: Magnetic and Site-occupation Features Of ε-Fe 2 O 3 -Based S...mentioning
confidence: 99%
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