Magnetic State of Cobalt in Layered Chalcogenide Fe4Co3Se8
The researches of the structural and magnetic properties of the layered chalcogenide Fe 4 Co 3 Se 8 , which has a ferrimagnetic order below T = 196 K, have been performed by means of X-ray diffraction, magnetic susceptibility measurements, and 59 Co nuclear magnetic resonance (NMR) spectroscopy. It...
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Veröffentlicht in: | Physics of metals and metallography 2024, Vol.125 (1), p.12-19 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The researches of the structural and magnetic properties of the layered chalcogenide Fe
4
Co
3
Se
8
, which has a ferrimagnetic order below
T
= 196 K, have been performed by means of X-ray diffraction, magnetic susceptibility measurements, and
59
Co nuclear magnetic resonance (NMR) spectroscopy. It is found that the effective magnetic moment of iron ions is μ
eff
≈ 5.90(5) μ
B
. The components of the magnetic shift and electric field gradient tensors at the Co nuclei sites have been determined. The hyperfine field induced on Co nuclei from neighboring iron ions has been estimated from the temperature dependences of the shift and susceptibility in Fe
4
Co
3
Se
8
. It was also established that cobalt ions in Fe
4
Co
3
Se
8
, as well as in the Co
7
Se
8
compound, do not have intrinsic magnetic moment, but they do have a moment induced from neighboring iron ions
≈ 0.36(4) μ
B
, which decreases at the magnetic ordering to 0.07(1)μ
B
due to mutual compensation of contributions from neighboring iron ions. |
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ISSN: | 0031-918X 1555-6190 |
DOI: | 10.1134/S0031918X23602469 |