Abstract
We studied Zn0.75Ni0.25Fe 2O4 magnetic nanoparticles before and after plasma treatment by employing X-ray diffraction, magnetic measurements, hyperthermia measurements using the mag-neTherm device, and Mössbauer spectroscopy. The Mössbauer spectra of Zn0.75Ni0.25Fe 2O4 were recorded at various temperatures from 4.2 to 295 K. The Mössbauer spectra for temperatures below the superparamagnetic transition temperature exhibited two sextets ascribed to tetrahedral and octahedral sites. Furthermore, the spectra demonstrated superparamagnetic behavior, as indicated by the doublet with zero hyperfine field at 295 K. The Mössbauer spectra exhibited line broadening with increasing temperature, indicating superparamagnetic relaxation. The temperature dependence of the anisotropy energy was calculated based on the relaxation frequency.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
W. H. D. Jong and P. J. Borm, Int. J. Nanomed. 3, 133 (2008).
S. Patra et al., ACS Appl. Mater. Interfaces 7, 9235 (2015).
H. Ghayour et al., J. Phys. Chem. Solids 111, 464 (2017).
D. Lisjak and A. Mertelj, Prog. Mater. Sci. 95, 286 (2018).
M. Vasilakaki et al., Nanoscale 10, 21244 (2018).
J. P. Chen et al., Phys. Rev. B 54, 13 (1996).
D. J. Fatemi et al., J. Appl. Phys. 85, 8 (1999).
R. H. Kodama and A. E. Berkowitz, Phys. Rev. B 59, 9 (1999).
Z. X. Tang, C. M. Sorensen, K. J. Klabunde and G. C. Hadjipanayis, Phys. Lett. 67, 25 (1991).
H. Ghayour et al., J. Phys. Chem. Solids 111, 464 (2017).
M. Dalal et al., J. Magn. Magn. Mater. 460, 12 (2018).
H. J. Kim and H. Choi, J. Magn. Magn. Mater. 484, 14 (2019).
H. N. Oak, K. S. Baek and B. C. Cho, Phys. Status Solidi B 207, 479 (1998).
C. S. Kim et al., J. Magn. Magn. Mater. 568, 254 (2003).
C. S. Kim, S. I. Park and Y. J. Oh, J. Magn. Magn. Mater. 215–216, 40 (2000).
S. B. Kim, B. W. Lee and C. S. Kim, J. Magn. Magn. Mater. 242–245, 747 (2002).
M. Blume and J. A. Tjon, Phys. Rev. 165, 446 (1968).
A. Aharoni, Phys. Rev. B 7, 1103 (1973).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Choi, H., Kim, H.J. Superparamagnetic Hyperfine Relaxation in Zn0.75Ni0.25Fe2O4. J. Korean Phys. Soc. 76, 976–979 (2020). https://doi.org/10.3938/jkps.76.976
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.3938/jkps.76.976