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Title: Study of magnetic properties of Fe100-xNix nanostructures using the Mössbauer spectroscopy method
Authors: Kadyrzhanov, K. K.
Rusakov, V. S.
Fadeev, M. S.
Kiseleva, T. Y.
Kozlovskiy, A. L.
Kenzhina, I. E.
Zdorovets, M. V.
Issue Date: 2019
Publisher: MDPI AG
Citation: Study of magnetic properties of Fe100-xNix nanostructures using the Mössbauer spectroscopy method / K. K. Kadyrzhanov, V. S. Rusakov, M. S. Fadeev et al. // Nanomaterials. — 2019. — Vol. 9. — Iss. 5. — 757.
Abstract: Hyperfine interactions of57Fe nuclei in Fe100-xNix nanostructures synthesized in polymer ion-track membranes were studied by Mössbauer spectroscopy. The main part of obtained nanostructures was Fe100-xNix nanotubes with bcc structure for 0 ≤ x ≤ 40, and with fcc structure for 50 ≤ x ≤ 90. The length, outside diameter and wall thickness of nanotubes were 12 µm, 400 ± 10 nm and 120 ± 5 nm respectively. For the studied nanotubes a magnetic texture is observedalong their axis. The average value of the angle between the direction of the Fe atom magnetic moment and the nanotubes axis decreases with increasing of Ni concentration for nanotubes with bcc structure from ~50◦ to ~40◦, and with fcc structure from ~55◦ to ~46◦. The concentration dependences of the hyperfine parameters of nanotubes Mössbauer spectra are qualitatively consistent with the data for bulk polycrystalline samples. With Ni concentration increasing the average value of the hyperfine magnetic field increases from ~328 kOe to ~335 kOe for the bcc structure and drops to ~303 kOe in the transition to the fcc structure and then decreases to ~290 kOe at x = 90. Replacing the Fe atom with the Ni atom in the nearest environment of Fe atom within nanotubes with bcc structure lead to an increase in the hyperfine magnetic field by “6–9 kOe”, and in tubes with fcc structure—to a decrease in the hyperfine magnetic field by “11–16 kOe”. The changes of the quadrupole shift and hyperfine magnetic field are linearly correlated with the coefficient −(15 ± 5)·10−4 mm/s/kOe. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85067176243
WOS ID: 000479007900099
PURE ID: 10013784
ISSN: 2079-4991
DOI: 10.3390/nano9050757
metadata.dc.description.sponsorship: Funding: This study was funded by the Ministry of Education and Science of the Republic of Kazakhstan (grant AP05133578).
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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