Characterization of optical trap for metallic particles using external magnetic field

2011 ◽  
Author(s):  
Vivek S. Jadhav ◽  
Wasim Sayyad ◽  
G. R. Kulkarni ◽  
B. M. Jaffar Ali
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Optical Trap ◽  
Metallic Particles

Synthesis and Characterization of Cobalt-Nickel Nanowires Formed under External Magnetic Field

2015 ◽  
Vol 799-800 ◽  
pp. 120-124 ◽  
Author(s):  
Mary Donnabelle L. Balela ◽  
Lalaine M. Dulin ◽  
Erica A. Garcia ◽  
M. Janelle H. Tica
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hexagonal Close Packed ◽  
Cobalt Nickel ◽  
Nickel Nanowires ◽  
Face Centered

Cobalt-nickel (Co-Ni) nanowires were formed by electroless deposition in ethylene glycol under external magnetic field. The effects of initial Co (II) and Ni (II) concentration on the surface and morphology of the synthesized nanowires were investigated by x-ray diffraction (XRD) and scanning electron microscope (SEM) respectively. An increase in the Co (II) concentration resulted in increase in diameter of the nanowires. However, the length of nanowires was observed to decrease. Higher Co (II) concentration resulted in a mixture of hexagonal close-packed and face-centered cubic Co-Ni nanowires. X-ray diffraction revealed that crystal growth occurred when the nanowires are annealed at 653 K for 10h.

Secondary resonance magnetic force microscopy using an external magnetic field for characterization of magnetic thin films

2015 ◽  
Vol 107 (10) ◽  
pp. 103110 ◽  
Author(s):  
Dongzi Liu ◽  
Kangxin Mo ◽  
Xidong Ding ◽  
Liangbing Zhao ◽  
Guocong Lin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
External Magnetic Field ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Thin Films ◽  
Secondary Resonance ◽  
Force Microscopy

In situ microwave characterization of microwire composites with external magnetic field

2012 ◽  
Vol 100 (19) ◽  
pp. 192903 ◽  
Author(s):  
F. X. Qin ◽  
C. Brosseau ◽  
H. X. Peng ◽  
H. Wang ◽  
J. Sun
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Microwave Characterization

Synthesis and characterization of iron oxide nanoparticles grown via a non-conventional chemical method using an external magnetic field

2019 ◽  
Vol 242 ◽  
pp. 13-16 ◽  
Author(s):  
J. Arenas-Alatorre ◽  
S. Tehuacanero C. ◽  
O. Lukas ◽  
A. Rodríguez-Gómez ◽  
R. Hernández Reyes ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
External Magnetic Field ◽  
Iron Oxide Nanoparticles ◽  
Chemical Method ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles

MAGNETORHEOLOGICAL CHARACTERIZATION OF HOLLOW POLYMER/MAGNETITE MICROSPHERICAL COMPOSITE

2009 ◽  
Vol 23 (17) ◽  
pp. 3613-3618 ◽  
Author(s):  
FEI FEI FANG ◽  
JI HYE KIM ◽  
HYOUNG JIN CHOI
Keyword(s):  
Magnetic Field ◽  
Magnetic Property ◽  
External Magnetic Field ◽  
Shear Viscosity ◽  
Colloidal Particles ◽  
Rheological Characteristics ◽  
Carrier Liquid ◽  
Magnetic Field Generator ◽  
Mr Characteristics

Magnetorheological (MR) suspensions, composed of colloidal particles dispersed in a carrier liquid, possess tunable rheological characteristics by applying an external magnetic field, showing dramatic changes of yield stress and shear viscosity caused by transformation between solid-like to liquid-like state. As a new MR material, we synthesized hollow polystyrene/magnetite (PS/Fe3O4) microspherical composite. Morphology of the PS obtained and the loaded magnetite were examined via SEM, and TGA spectra confirmed the composition. Magnetic property was tested by VSM data. MR characteristics of MR suspension based on PS / Fe 3 O 4 composites were studied via both steady shear and oscillatory tests using a rotational rheometer equipped with a magnetic field generator.

scholarly journals Simulation of Magnetodielectric Effect in Magnetorheological Elastomers

2019 ◽  
Vol 20 (6) ◽  
pp. 1457 ◽  
Author(s):  
Danil Isaev ◽  
Anna Semisalova ◽  
Yulia Alekhina ◽  
Liudmila Makarova ◽  
Nikolai Perov
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Particles ◽  
Effective Permittivity ◽  
Functional Materials ◽  
Magnetorheological Elastomers ◽  
Metallic Particles ◽  
Lognormal Size Distribution ◽  
Proposed Model ◽  
Magnetodielectric Effect

We present the results of numerical simulation of magnetodielectric effect (MDE) in magnetorheological elastomers (MRE)—the change of effective permittivity of elastomer placed under the external magnetic field. The computer model of effect is based on an assumption about the displacement of magnetic particles inside the elastic matrix under the external magnetic field and the formation of chain-like structures. Such displacement of metallic particles between the planes of capacitor leads to the change of capacity, which can be considered as a change of effective permittivity of elastomer caused by magnetic field (magnetodielectric effect). In the literature, mainly the 2D approach is used to model similar effects. In this paper, we present a new approach of magnetorheological elastomers simulation—a 3D-model of the magnetodielectric effect with ability to simulate systems of 10 5 particles. Within the framework of the model, three types of particle size distributions were simulated, which gives an advantage over previously reported approaches. Lognormal size distribution was shown to give better qualitative match of the modeling and experimental results than monosized type. The developed model resulted in a good qualitative agreement with all experimental data obtained earlier for Fe-based elastomers. The proposed model is useful to study these novel functional materials, analyze the features of magnetodielectric effect and predict the optimal composition of magnetorheological elastomers for further profound experimental study.

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