TY - JOUR
T1 - Magnetic features of some extraterrestrial Fe-Ni-Co alloys
T2 - Study using magnetization measurements and Mössbauer spectroscopy
AU - Goryunov, M. V.
AU - Felner, I.
AU - Varga, G.
AU - Dankházi, Z.
AU - Chukin, A. V.
AU - Naumov, S. P.
AU - Leitus, G.
AU - Muftakhetdinova, R. F.
AU - Kuzmann, E.
AU - Homonnay, Z.
AU - Oshtrakh, M. I.
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/11/1
Y1 - 2025/11/1
N2 - Magnetic features of extraterrestrial Fe-Ni-Co alloys from iron and stony-iron meteorites were studied by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction, Mössbauer spectroscopy and magnetization measurements. SEM with EDS demonstrated the presence of different compositions of the α-Fe(Ni, Co), α2-Fe(Ni, Co), γ-Fe(Ni, Co) and γ-FeNi(Co) phases in various alloys with variations in Ni concentrations. The Mössbauer spectra of Fe-Ni-Co alloys consist of different numbers of magnetic sextets. The values of 57Fe hyperfine parameters were assigned to corresponding α-Fe(Ni, Co), α2-Fe(Ni, Co), γ-Fe(Ni, Co) and γ-FeNi(Co) phases. The saturation magnetic moments for some Fe-Ni-Co alloys were slightly higher while those for other Fe-Ni-Co alloys were slightly lower than that of pure Fe. The zero-field-cooled (ZFC) and field-cooled (FC) branches of the magnetization curves showed unusual behavior for Fe-Ni-Co alloys from three meteorites when the ZFC curve lies over the FC one which is a very rare phenomenon.
AB - Magnetic features of extraterrestrial Fe-Ni-Co alloys from iron and stony-iron meteorites were studied by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), X-ray diffraction, Mössbauer spectroscopy and magnetization measurements. SEM with EDS demonstrated the presence of different compositions of the α-Fe(Ni, Co), α2-Fe(Ni, Co), γ-Fe(Ni, Co) and γ-FeNi(Co) phases in various alloys with variations in Ni concentrations. The Mössbauer spectra of Fe-Ni-Co alloys consist of different numbers of magnetic sextets. The values of 57Fe hyperfine parameters were assigned to corresponding α-Fe(Ni, Co), α2-Fe(Ni, Co), γ-Fe(Ni, Co) and γ-FeNi(Co) phases. The saturation magnetic moments for some Fe-Ni-Co alloys were slightly higher while those for other Fe-Ni-Co alloys were slightly lower than that of pure Fe. The zero-field-cooled (ZFC) and field-cooled (FC) branches of the magnetization curves showed unusual behavior for Fe-Ni-Co alloys from three meteorites when the ZFC curve lies over the FC one which is a very rare phenomenon.
KW - Extraterrestrial Fe-Ni-Co alloys
KW - Fe hyperfine parameters
KW - Magnetic features
KW - Magnetization measurements
KW - Mössbauer spectroscopy
KW - Ni concentrations
KW - Phase composition
UR - https://www.scopus.com/pages/publications/105012129965
U2 - 10.1016/j.physb.2025.417656
DO - 10.1016/j.physb.2025.417656
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AN - SCOPUS:105012129965
SN - 0921-4526
VL - 716
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
M1 - 417656
ER -