Ni0.4Cu0.2Zn0.4TbxFe2-xO4 nanospinel ferrites: Ultrasonic synthesis and physical properties
Göster/ Aç
Erişim
info:eu-repo/semantics/openAccessTarih
2019Yazar
Slimani, YassineAlmessiere, M. A.
Korkmaz, A. Demir
Güner, Sadık
Güngüneş, Hakan
Sertkol, Murat
Baykal, Abdulhadi
Üst veri
Tüm öğe kaydını gösterÖzet
The Fe3+ ions were replace with Tb3+ ions as highly paramagnetic rare earth element within the structure of Ni0.4Cu0.2Zn0.4Fe2O4 nano-spinel ferrites (NSFs). The structural, magnetic, spectroscopic and optic properties have been studied in details. All products have been synthesized via ultrasonic approach via Qsonica ultrasonic homogenizer, frequency: 20 kHz and power 70 W for 60 min. No annealing or calcination process was applied for any product. The microstructural analysis of products has been done via X-ray powder ciiffractometry (XRD) which presented the cubic spinel structure with nanosized distribution of all. The cubic morphology of all products were confirmed by both HR-TEM and FE-SEM. Optical band gap (E-g) values were assessed by applying %DR (percent diffuse reflectance) analysis and Kubelka-Munk theory. The Tauc schemes showed that E-g values are in a narrow range (1.87-1.98 eV). The quadrupole splitting, line width, hyperfine magnetic field, isomer shift values and cation distribution have been determined from Fe-57 Mossbauer analysis. The magnetic properties of various nanoparticles have been obtained from VSM (vibration sample magnetometer) measurements at 10 and 300 K (RT). The magnetic results revealed superparamagnetic and soft ferromagnetic traits at 10 and 300 K, respectively. M-s (saturation magnetization) and M-r (remanence) initially increase with increasing Tb(3+ )substituting level up to x = 0.06 then diminish for further x values. H-c (coercivity) shows an opposite variation tendency of M-s and M-r. The observed magnetic traits are deeply discussed in relation with the structure, morphology, magnetic moments and cation distributions.
Cilt
59Koleksiyonlar
İlgili Öğeler
Başlık, yazar, küratör ve konuya göre gösterilen ilgili öğeler.
-
Effects of coal clinkers on physical and mechanical properties of the briquettes
This study was carried out to investigate the effect of coal clinker used in briquette production on physical and mechanical properties of briquettes. To do this, seven briquette classes were formed by changing the volume ... -
Effects of freeze-thawing cycles on the physical and mechanical properties of basaltic and dolomitic rocks evaluated with a decay function model
Aral, İbrahim Feda; Boy, Ramiz; Dinçer, Ali Rıza (Springer Science and Business Media Deutschland GmbH, 2021)Basalts from Çorlu Karatepe and dolomite from Kırklareli subjected to freeze-thawing (F-T) cycles were studied, and the resulting changes were analyzed. The unweathered rocks and those subjected to 50 F-T cycles after every ... -
The Effect of Cr3+ Substitution on Magnetic Properties of CoFe2O4 Nanoparticles Synthesized by Microwave Combustion Route
Baykal, Abdulhadi; Eryigit, S.; Sertkol, M.; Ünlü, S.; Yıldız, Aylin; Shirsath, Sagar E. (Springer, 2016)CoCr (x) Fe2-x O-4 (0.0 aecurrency sign x aecurrency sign 1.0) nanoparticles were synthesized by a microwave combustion method and the effect of Cr3+ substitution on structural, morphological, and magnetic properties of ...