Law of Approach to Magnetic Saturation in Nanocrystalline Pr2Co7Cx(x≤1): Effects of Carbonation

SPIN ◽  
2020 ◽  
Vol 10 (03) ◽  
pp. 2050016
Author(s):  
Z. Yamkane ◽  
R. Fersi ◽  
F. Z. Rachid ◽  
R. Moubah ◽  
H. Lassri ◽  
...  
Keyword(s):  
Physical Property Measurement System ◽  
Mean Field Theory ◽  
Mean Field ◽  
Physical Property ◽  
Exchange Interactions ◽  
X Ray Diffraction ◽  
Fundamental Parameters ◽  
Transmission Electron ◽  
Random Magnetic Anisotropy ◽  
Anisotropy Model

We report on the effect of Carbon insertion on the microstructure and magnetic properties of nanocrystalline Pr2Co7Cx([Formula: see text]). The Pr2Co7Cx were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and physical property measurement system (PPMS9) Quantum Design. Mean field theory was utilized to depict the temperature dependence of magnetization and deduce the exchange interactions. The approach to saturation magnetization was as well used. The results were interpreted in the framework of random magnetic anisotropy model. From such analysis, some fundamental parameters were extracted.

Synthesis of Monodispersed Fe3O4 Magnetite Nanoparticles by Ethylene Glycol Solvothermal Method

2013 ◽  
Vol 634-638 ◽  
pp. 2276-2279 ◽  
Author(s):  
Gang Xu ◽  
Min Zhang ◽  
Ping Ou ◽  
Yi Zhang ◽  
Gao Rong Han
Keyword(s):  
Ethylene Glycol ◽  
Magnetite Nanoparticles ◽  
Solvothermal Method ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
X Ray Diffraction ◽  
Ferromagnetic Property ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Property Measurement

Monodispersed Fe3O4 magnetite nanoparticles were successfully synthesized via a simple solvothermal method, in which Fe(NO3)3•9H2O was used as the starting materials, KOH as the mineralizer, and ethylene glycol (en) as the solvent. X-ray diffraction (XRD) and selected area electron diffraction (SAED) were employed to characterize the phase composition, transmission electron microscope (TEM) to observe the morphology and the particle size, and physical property measurement system (PPMS) to investigate the magnetic property of the synthesized powders, respectively. The synthesized Fe3O4 magnetite nanoparticles are of 50-100nm in size, and of notable ferromagnetic property. The saturation magnetization, remanent magnetization, and coercive field are 68.8emu•g-1, 12.9emu•g-1, 138.5Oe, respectively. Based on the experimental resuts, the formation mechanism and the well monodispersed reason of the solvothersized Fe3O4 nanoparticles are discussed.

scholarly journals Influence of the Alcoholic/Ethanolic Extract of Mangifera indica Residues on the Green Synthesis of FeO Nanoparticles and Their Application for the Remediation of Agricultural Soils

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7633
Author(s):  
Jhordi Bautista-Guzman ◽  
Rosa Gomez-Morales ◽  
David Asmat-Campos ◽  
Noemi Raquel Checca
Keyword(s):  
Green Synthesis ◽  
Agricultural Soils ◽  
Mangifera Indica ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
Ethanolic Extract ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Potential Alternative

The green synthesis of iron oxide nanoparticles (FeO NP) has been investigated using the extract in absolute ethanolic and alcoholic solvents 96% from the peel of the mango fruit (Mangifera indica), thus evaluating the influence of the type of solvent on the extraction of reducing metabolites. A broad approach to characterization initially controlled by UV-vis spectrophotometry has been directed, the formation mechanism was evaluated by Fourier transform infrared spectroscopy (FTIR), the magnetic properties by characterization by Physical Property Measurement System (PPSM), in addition to a large number of techniques such as X-ray energy dispersive spectroscopy (EDS), X-ray diffraction (DRX), transmission electron microscopy (TEM/STEM), electron energy loss spectroscopy (EELS), and Z potential to confirm the formation of FeO NP. The results suggest better characteristics for FeO NP synthesized using 96% alcoholic solvent extract. The successful synthesis was directly proven in the removal of metals (Cr-VI, Cd, and Pb) as a potential alternative in the remediation of agricultural soils.

scholarly journals Synthesis and Properties of Nanosized Stoichiometric Cobalt Ferrite Spinel

Materials ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1241 ◽  
Author(s):  
Vilém Bartůněk ◽  
David Sedmidubský ◽  
Štěpán Huber ◽  
Marie Švecová ◽  
Pavel Ulbrich ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Property Measurement ◽  
Scherrer Formula ◽  
Ferrite Spinel

Nanoparticles with controllable sizes of ferrite spinel CoFe2O4 were formed by thermal treatment of cobalt-iron glycerolate. Thermal behavior during the heating was studied by differential thermal analysis combined with thermogravimetry. The precursor, as well as the prepared nanoparticles, were analyzed by a broad spectrum of analytic techniques (X-Ray photoelectron spectroscopy (XPS), X-Ray diffraction (XRD), Energy dispersive spectroscopy (EDS), Atomic absorption spectroscopy (AAS), Scanning electron microscopy (SEM), and Raman spectroscopy). The particle size of nanoparticles was obtained from Transmission electron microscopy and also calculated using Scherrer formula. A vibrating sample magnetometer (VSM) in a Physical Property Measurement System was used to analyze the magnetic properties of nanoparticles.

scholarly journals Characterization of a Novel Nanocomposite Film Based on Functionalized Chitosan–Pt–Fe3O4 Hybrid Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1275
Author(s):  
Sangeeta Kumari ◽  
Raj Pal Singh ◽  
Nayaku N. Chavan ◽  
Shivendra V. Sahi ◽  
Nilesh Sharma
Keyword(s):  
Nanocomposite Film ◽  
Biomedical Applications ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
Nanocomposite Films ◽  
Hybrid Nanoparticles ◽  
X Ray Diffraction ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron

The development of organic—inorganic hybrids or nanocomposite films is increasingly becoming attractive in light of their emerging applications. This research focuses on the formation of a unique nanocomposite film with enhanced elasticity suitable for many biomedical applications. The physical property measurement system and transmission electron microscopy were used to analyze Pt–Fe3O4 hybrid nanoparticles. These nanohybrids exhibited magnetic effects. They were further exploited to prepare the nanocomposite films in conjunction with a chitosan-g–glycolic acid organic fraction. The nanocomposite films were then examined using standard techniques: thermogravimetric analysis, X-ray diffraction, Fourier transform infrared spectroscopy, and atomic force microscopy. Tensile strength testing demonstrated a significantly greater elastic strength of these nanocomposite films than pure chitosan films. The water absorption behavior of the nanocomposites was evaluated by measuring swelling degree. These nanocomposites were observed to have substantially improved physical properties. Such novel nanocomposites can be extended to various biomedical applications, which include drug delivery and tissue engineering.

Preparation and Characterization of Ultrafine Monodisperse Iron Oxide Nanoparticles by Solvothermal Method

2015 ◽  
Vol 748 ◽  
pp. 93-96
Author(s):  
Cheng Mei Liu ◽  
Yu Xia Zhao ◽  
Jin Dong ◽  
Lu Hai Li ◽  
Yen Wei ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Solvothermal Method ◽  
Physical Property Measurement System ◽  
Thermo Gravimetric Analysis ◽  
Physical Property ◽  
Oxide Nanoparticles ◽  
Gravimetric Analysis ◽  
Transmission Electron ◽  
Different Diameters

Using iron-oleate complex as a precursor, oleic acid as a stabilizer and 1-octadecene as a reductant, uniform-sized and highly monodisperse iron oxide nanoparitcles with different diameters were successfully synthesized via solvothermal method by changing reaction time. Transmission electron microscope (TEM), thermo-gravimetric analysis (TGA), fourier transform infrared spectroscopy (FT-IR), physical property measurement system (PPMS) and dynamic light scattering (DLS) was used to characterize obtained iron oxide nanoparticles. These results indicated that iron oxide nanoparitcles with the diameter ranging from 4 to 8 nm can be controllably synthesized.

Single crystal growth and magnetic properties of Co-doped ZnNb2O6

2019 ◽  
Vol 33 (23) ◽  
pp. 1950274
Author(s):  
Ying Liu ◽  
Dapeng Xu ◽  
Huamin Yu ◽  
Tian Cui ◽  
Liang Li
Keyword(s):  
Magnetic Properties ◽  
Single Crystals ◽  
Photoelectron Spectroscopy ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
X Ray Diffraction ◽  
Zone Method ◽  
X Ray ◽  
Structure Formula ◽  
Property Measurement

The columbite structure [Formula: see text] single crystals have been successfully grown by using the optical floating zone method. The as-grown crystals are characterized by X-ray diffraction (XRD), Raman spectroscopy (RS) and X-ray photoelectron spectroscopy (XPS). All these analyses show that the doping Co ions do not disturb the structure of columbite [Formula: see text] and some [Formula: see text] ions are substituted by transition metal [Formula: see text] ions without any other impurities. The magnetic properties of as-grown [Formula: see text] crystals have been investigated using Physical Property Measurement System (PPMS). The effective magnetic moment of [Formula: see text] crystals is [Formula: see text], indicating that [Formula: see text] ions present in [Formula: see text] single crystals are in mixed HS and LS states. The ferromagnetic, antiferromagnetic and paramagnetic characters of as-grown crystals are also discussed.

Magnetic Properties and Magnetocaloric Effect of Nd0.7Gd0.3Mn2Si2 Alloy

2017 ◽  
Vol 1142 ◽  
pp. 47-52 ◽  
Author(s):  
Shi Dong Lin ◽  
Xiao Long Chen ◽  
Jiang Wang ◽  
Chao Fan Zhu ◽  
Mao Hua Rong ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
Entropy Change ◽  
Spin Reorientation ◽  
Cooling Power ◽  
Field Change ◽  
X Ray Diffraction ◽  
Scanning Calorimetry

In this work, crystal structure, magnetic properties and magnetocaloric effect of Nd0.7Gd0.3Mn2Si2 alloy were studied by X-ray diffraction (XRD), Physical Property Measurement System (PPMS) and Differential Scanning Calorimetry (DSC). Nd0.7Gd0.3Mn2Si2 crystallizes in ThCr2Si2-typed structure with space group I4/mmm, in which the Nd, Gd, Mn and Si atoms occupy 2a (0, 0, 0), 2a (0, 0, 0), 4d (0, 1/2, 1/4) and 4e (0, 0, 0.38261) position, respectively. The Curie temperature (Tc) of Nd0.7Gd0.3Mn2Si2 alloy is 42 K, while the spin reorientation temperature (TSR) is 26 K and the Nel temperature (TN) is 410 K. The Tc and TN were determined using PPMS and DSC, respectively. The maximum value of the magnetic entropy change (-Smax) in the field change of 0-5 T is 11.862 J/kg K, while the value of relative cooling power (RCP) in Nd0.7Gd0.3Mn2Si2 alloy is 69.666 J/kg under the field change of 5 T.

Synthesis Behavior of La0.7Ca0.3MnO3 by Hydrothermal Method

2007 ◽  
Vol 26-28 ◽  
pp. 703-706
Author(s):  
Hung Su Im ◽  
Sang M. Lee ◽  
Chan Gyu Lee ◽  
Bon Heun Koo ◽  
Jung Bum Yoon ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Hydrothermal Reaction ◽  
Physical Property Measurement System ◽  
Physical Property ◽  
Transmission Electron ◽  
Wide Range ◽  
Property Measurement ◽  
Perovskite Type ◽  
Type Crystal

We indicated synthesization of LCMO by hydrothermal reaction. The results of transmission electron microscopy revealed that the LCMO particles had wide range in size and various in shapes. The LCMO particles had a perovskite-type crystal structure with some other phases. Magnetic property was measured by physical property measurement system. Their crystallinity and magnetization tended to increased with increasing reaction time.

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