Magnetic Attributes of NiFe2O4 Nanoparticles: Influence of Dysprosium Ions (Dy3+) Substitution
Yükleniyor...
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Mdpi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This paper reports the influence of dysprosium ion (Dy3+) substitution on the structural and magnetic properties of NiDyxFe2-xO4 (0.0 <= x <= 0.1) nanoparticles (NPs) prepared using a hydrothermal method. The structure and morphology of the as-synthesized NPs were characterized via X-ray diffraction (XRD), scanning and transmission electron microscope (SEM, and TEM) analyses. Fe-57 Mossbauer spectra were recorded to determine the Dy3+ content dependent variation in the line width, isomer shift, quadrupole splitting, and hyperfine magnetic fields. Furthermore, the magnetic properties of the prepared NPs were also investigated by zero-field cooled (ZFC) and field cooled (FC) magnetizations and AC susceptibility measurements. The M-ZFC (T) results showed a blocking temperature (T-B). Below T-B, the products behave as ferromagnetic (FM) and act superparamagnetic (SPM) above T-B. The M-FC (T) curves indicated the existence of super-spin glass (SSG) behavior below T-s (spin-glass freezing temperature). The AC susceptibility measurements confirmed the existence of the two transition temperatures (i.e., T-B and T-s). Numerous models, e.g., Neel-Arrhenius (N-A), Vogel-Fulcher (V-F), and critical slowing down (CSD), were used to investigate the dynamics of the systems. It was found that the Dy substitution enhanced the magnetic interactions.
Açıklama
Anahtar Kelimeler
NiFe2O4, Spinel Ferrites, Structure, Microstructure, Magnetization, AC Susceptibility
Kaynak
Nanomaterials
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
9
Sayı
6
Künye
Almessiere, M. A., Slimani, Y., Güngüneş, H., Ali, S., Manikandan, A., Ercan, I., ... & Trukhanov, A. V. (2019). Magnetic attributes of NiFe2O4 nanoparticles: influence of dysprosium ions (Dy3+) substitution. Nanomaterials, 9(6), 820.
