- Magnetic Behavior of Composite Nanoparticle Assemblies

2014 ◽  
pp. 266-299
Keyword(s):  
Magnetic Behavior ◽  
Nanoparticle Assemblies ◽  
Composite Nanoparticle

scholarly journals One-Step Direct Synthesis of SiO2 -TiO2 Composite Nanoparticle Assemblies with Hollow Spherical Morphology

2017 ◽  
Vol 2017 (24) ◽  
pp. 3016-3016
Author(s):  
Hien Thi Thu Nguyen ◽  
Teppei Habu ◽  
Masataka Ohtani ◽  
Kazuya Kobiro
Keyword(s):  
Direct Synthesis ◽  
Spherical Morphology ◽  
Nanoparticle Assemblies ◽  
Composite Nanoparticle ◽  
One Step

Magnetic behavior of dense nanoparticle assemblies: Interplay of interparticle interactions and particle system morphology

2012 ◽  
Vol 86 (21) ◽  
Author(s):  
G. Margaris ◽  
K. N. Trohidou ◽  
V. Iannotti ◽  
G. Ausanio ◽  
L. Lanotte ◽  
...  
Keyword(s):  
Particle System ◽  
Magnetic Behavior ◽  
Interparticle Interactions ◽  
Nanoparticle Assemblies

Size effects on the magnetic behavior of γ-Fe2O3 core/SiO2 shell nanoparticle assemblies

2021 ◽  
Vol 522 ◽  
pp. 167570
Author(s):  
Marianna Vasilakaki ◽  
Fevronia Gemenetzi ◽  
Eamonn Devlin ◽  
Dong Kee Yi ◽  
Siti Nurhanna Riduan ◽  
...  
Keyword(s):  
Size Effects ◽  
Magnetic Behavior ◽  
Nanoparticle Assemblies ◽  
Sio2 Shell

scholarly journals Iron nanoparticle assemblies: structures and magnetic behavior

2005 ◽  
Vol 17 ◽  
pp. 185-195 ◽  
Author(s):  
D Farrell ◽  
Y Cheng ◽  
S Kan ◽  
M Sachan ◽  
Y Ding ◽  
...  
Keyword(s):  
Magnetic Behavior ◽  
Iron Nanoparticle ◽  
Nanoparticle Assemblies

Lorentz electron microscopy of magnetic domains in rapidly solidified and annealed Pt-Co-B alloys

1991 ◽  
Vol 49 ◽  
pp. 784-785
Author(s):  
N. Qiu ◽  
J. E. Wittig
Keyword(s):  
Rapid Solidification ◽  
Ion Beam ◽  
Magnetic Behavior ◽  
High Coercivity ◽  
Magnetic Domains ◽  
Beam Angle ◽  
Tem Analysis ◽  
Intrinsic Coercivity ◽  
Hard Magnets ◽  
Rapidly Solidified

PtCo hard magnets have specialized applications owing to their relatively high coercivity combined with corrosion resistance and ductility. Increased intrinsic coercivity has been recently obtained by rapid solidification processing of PtCo alloys containing boron. After rapid solidification by double anvil splat quenching and subsequent annealing for 30 minutes at 650°C, an alloy with composition Pt42Co45B13 (at.%) exhibited intrinsic coercivity up to 14kOe. This represents a significant improvement compared to the average coercivities in conventional binary PtCo alloys of 5 to 8 kOe.Rapidly solidified specimens of Pt42Co45B13 (at.%) were annealed at 650°C and 800°C for 30 minutes. The magnetic behavior was characterized by measuring the coercive force (Hc). Samples for TEM analysis were mechanically thinned to 100 μm, dimpled to about 30 nm, and ion milled to electron transparency in a Gatan Duomill at 5 kV and 1 mA gun current. The incident ion beam angle was set at 15° and the samples were liquid nitrogen cooled during milling. These samples were analyzed with a Philips CM20T TEM/STEM operated at 200 kV.

STRANGE MAGNETIC BEHAVIOR IN THE LITHIUM-METHYLAMINE SYSTEM

1980 ◽  
Vol 41 (C8) ◽  
pp. C8-45-C8-48
Author(s):  
A. Stacy ◽  
D. C. Johnson ◽  
M. J. Sienko
Keyword(s):  
Magnetic Behavior

Magnetic Properties of xCeO2•(50 − x) PbO•50B2O3 Glasses and Glass Ceramics

2017 ◽  
Vol 13 (1) ◽  
pp. 4486-4494 ◽  
Author(s):  
G.El Damrawi ◽  
F. Gharghar
Keyword(s):  
Magnetic Properties ◽  
Large Scale ◽  
Glass Ceramics ◽  
Magnetic Behavior ◽  
Crystal Formation ◽  
Dual Roles ◽  
Effective Agent ◽  
Ordered Structures ◽  
Essential Change

Cerium oxide in borate glasses of composition xCeO2·(50 − x)PbO·50B2O3 plays an important role in changing both microstructure and magnetic behaviors of the system. The structural role of CeO2 as an effective agent for cluster and crystal formation in borate network is clearly evidenced by XRD technique. Both structure and size of well-formed cerium separated clusters have an effective influence on the structural properties. The cluster aggregations are documented to be found in different range ordered structures, intermediate and long range orders are the most structures in which cerium phases are involved. The nano-sized crystallized cerium species in lead borate phase are evidenced to have magnetic behavior.  The criteria of building new specific borate phase enriched with cerium as ferrimagnetism has been found to keep the magnetization in large scale even at extremely high temperature. Treating the glass thermally or exposing it to an effective dose of ionized radiation is evidenced to have an essential change in magnetic properties. Thermal heat treatment for some of investigated materials is observed to play dual roles in the glass matrix. It can not only enhance alignment processes of the magnetic moment but also increases the capacity of the crystallite species in the magnetic phases. On the other hand, reverse processes are remarked under the effect of irradiation. The magnetization was found to be lowered, since several types of the trap centers which are regarded as defective states can be produced by effect of ionized radiation. 

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