Structural, optical and magnetic behavior of sol–gel derived Ni-doped dilute magnetic semiconductor TiO2 nanocrystals for advanced functional applications

2019 ◽  
Vol 21 (5) ◽  
pp. 2519-2532 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Guruprasad Mandal ◽  
M. Vasundhara
Keyword(s):  
Magnetic Properties ◽  
Dilute Magnetic Semiconductor ◽  
Sol Gel ◽  
Magnetic Semiconductor ◽  
Magnetic Behavior ◽  
Defect Engineering ◽  
Tio2 Nanocrystals ◽  
Functional Applications

Defect engineering of Ni-doped TiO2 could tailor the magnetic properties through BMP interactions, which is advantageous for spintronics applications.

scholarly journals Defect mediated mechanism in undoped, Cu and Zn-doped TiO2 nanocrystals for tailoring the band gap and magnetic properties

RSC Advances ◽  
2018 ◽  
Vol 8 (73) ◽  
pp. 41994-42008 ◽  
Author(s):  
V. R. Akshay ◽  
B. Arun ◽  
Shubhra Dash ◽  
Ajit K. Patra ◽  
Guruprasad Mandal ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Band Gap ◽  
Dilute Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Magnetic Behavior ◽  
Semiconductor Materials ◽  
Magnetic Element ◽  
Tio2 Nanocrystals ◽  
Doped Tio2 ◽  
Cu And Zn

Oxide based dilute magnetic semiconductor materials are of great interest and this study focusses on the optical and magnetic behavior of non-magnetic element doped TiO2 nanocrystals which provides a significant reduction in bandgap with enhanced magnetization.

Structural, Morphological and Magnetic Characterization of Sm-substituted Ni-Zn Ferrite

2020 ◽  
Vol 10 (2) ◽  
pp. 152-156 ◽  
Author(s):  
Muhammad Hanif bin Zahari ◽  
Beh Hoe Guan ◽  
Lee Kean Chuan ◽  
Afiq Azri bin Zainudin
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Saturation Magnetization ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Rare Earth Ions ◽  
Ion Concentration ◽  
Zn Ferrite ◽  
Auto Combustion ◽  
Combustion Technique

Background: Rare earth materials are known for its salient electrical insulation properties with high values of electrical resistivity. It is expected that the substitution of rare earth ions into spinel ferrites could significantly alter its magnetic properties. In this work, the effect of the addition of Samarium ions on the structural, morphological and magnetic properties of Ni0.5Zn0.5SmxFe2-xO4 (x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) synthesized using sol-gel auto combustion technique was investigated. Methods: A series of Samarium-substituted Ni-Zn ferrite nanoparticles (Ni0.5Zn0.5SmxFe2-xO4 where x=0.00, 0.02, 0.04, 0.06, 0.08, 0.10) were synthesized by sol-gel auto-combustion technique. Structural, morphological and magnetic properties of the samples were examined through X-Ray Diffraction (XRD), Field-Emission Scanning Electron Microscope (FESEM) and Vibrating Sample Magnetometer (VSM) measurements. Results: XRD patterns revealed single-phased samples with spinel cubic structure up to x= 0.04. The average crystallite size of the samples varied in the range of 41.8 – 85.6 nm. The prepared samples exhibited agglomerated particles with larger grain size observed in Sm-substituted Ni-Zn ferrite as compared to the unsubstituted sample. The prepared samples exhibited typical soft magnetic behavior as evidenced by the small coercivity field. The magnetic saturation, Ms values decreased as the Sm3+ concentration increases. Conclusion: The substituted Ni-Zn ferrites form agglomerated particles inching towards more uniform microstructure with each increase in Sm3+ substitution. The saturation magnetization of substituted samples decreases with the increase of samarium ion concentration. The decrease in saturation magnetization can be explained based on weak super exchange interaction between A and B sites. The difference in magnetic properties between the samples despite the slight difference in Sm3+ concentrations suggests that the properties of the NiZnFe2O4 can be ‘tuned’, depending on the present need, through the substitution of Fe3+ with rare earth ions.

Magnetic properties of dilute magnetic semiconductor Cd0.82Mn0.18GeAs2 under high pressures

2011 ◽  
Vol 56 (6) ◽  
pp. 924-927 ◽  
Author(s):  
A. Yu. Mollaev ◽  
I. K. Kamilov ◽  
S. F. Marenkin ◽  
R. K. Arslanov ◽  
U. Z. Zalibekov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Dilute Magnetic Semiconductor ◽  
High Pressures ◽  
Magnetic Semiconductor

Magnetic Properties of Dilute Magnetic Semiconductor (CuIn)1-xMn2xS2

2006 ◽  
Vol 75 (3) ◽  
pp. 034711
Author(s):  
Kazuhiko Ohmori ◽  
Machie Saitou ◽  
Guido Eilers ◽  
Masaaki Matsui
Keyword(s):  
Magnetic Properties ◽  
Dilute Magnetic Semiconductor ◽  
Magnetic Semiconductor

Structural, optical and magnetic properties of a dilute magnetic semiconductor based on Ga-doped ZnO and Co

2020 ◽  
Vol 35 (10) ◽  
pp. 105003
Author(s):  
A Sh Asvarov ◽  
A V Butashin ◽  
V M Kanevsky ◽  
A E Muslimov ◽  
N S Perov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Dilute Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Optical And Magnetic Properties ◽  
Doped Zno

Anomalous magnetic behavior ofMn−Mndimers in the dilute magnetic semiconductor(Ga,Mn)N

2007 ◽  
Vol 76 (24) ◽  
Author(s):  
Qinghua Liu ◽  
Zhihu Sun ◽  
Wensheng Yan ◽  
Wenjie Zhong ◽  
Zhiyun Pan ◽  
...  
Keyword(s):  
Dilute Magnetic Semiconductor ◽  
Magnetic Semiconductor ◽  
Magnetic Behavior

scholarly journals The influence of the chelating/combustion agents on the structure and magnetic properties of zinc ferrite

2012 ◽  
Vol 10 (6) ◽  
pp. 1799-1807 ◽  
Author(s):  
Tamara Slatineanu ◽  
Eliano Diana ◽  
Valentin Nica ◽  
Victor Oancea ◽  
Ovidiu Caltun ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Zinc Ferrite ◽  
Structural Parameters ◽  
Sol Gel ◽  
Magnetic Behavior ◽  
Combustion Method ◽  
Structural Features ◽  
Lattice Parameter ◽  
Zn Ferrite ◽  
Auto Combustion

AbstractThe present study is reporting the influence of the chelating/combustion agents on the magnetic properties of Zn ferrite. Six chelating/combustion agents, citric acid, egg white, tartaric acid, glycine, glucose and urea, were used to obtain monophase zinc nanoferrite via a sol-gel auto-combustion method. The samples were subjected to a comparative study of structural features and magnetic properties by means of infrared spectroscopy, X-ray diffractometry, scanning electron microscopy and vibrating sample magnetometry. Significant influence of fuel and combustion mode was observed in the magnetic behavior of as-obtained samples. Values of the structural parameters were discovered to vary as a function of fuel choice, and to obtain crystallite size between 38 and 62 nm, inversion degree between 0.239 and 0.807, lattice parameter between 8.4125 and 8.4432 Å. The optimization of sol-gel method synthesis of zinc ferrite nanoparticles by chosing the appropriate fuel is providing structural and magnetic properties of zinc nanoferrite as potential materials to be used in biomedical applications.

scholarly journals Influence of preparation method on structural, optical and magnetic properties of nickel ferrite nanoparticles

2017 ◽  
Vol 35 (1) ◽  
pp. 58-65 ◽  
Author(s):  
Ayaz Arif Khan ◽  
M. Javed ◽  
A. Rauf Khan ◽  
Yousaf Iqbal ◽  
Asif Majeed ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Nickel Ferrite ◽  
Sol Gel ◽  
Chemical Properties ◽  
Magnetic Behavior ◽  
Sem Images ◽  
Vis Spectroscopy ◽  
Nickel Ferrite Nanoparticles ◽  
Optical And Magnetic Properties ◽  
Co Precipitation

AbstractNanocrystalline NiFe2O4 particles were prepared by conventional sol-gel, citrate-nitrate sol-gel combustion and co-precipitation methods. The synthesized samples were annealed at 1000 °C for two hours and structural, chemical, morphological, optical and magnetic properties of nickel ferrite were investigated. The structural properties were investigated by X-ray diffraction (XRD) technique which confirmed the formation of single phase NiFe2O4 particles derived by the three methods. The chemical properties were analyzed by Fourier transform infrared (FT-IR) spectroscopy which confirmed the corresponding vibration modes in the samples. The optical properties were studied by UV-Vis spectroscopy. The morphological study of the as-synthesized samples was carried out by scanning electron microscopy (SEM). SEM images showed the agglomerated nanoparticles of NiFe2O4. The magnetic properties were investigated by vibrating sample magnetometer (VSM), which showed that the calcined samples exhibited typical magnetic behavior.

Sign in / Sign up

Export Citation Format

Share Document