The effects of artificial holes with different diameters on the surface magnetic properties in YBCO superconductor

2007 ◽  
Vol 463-465 ◽  
pp. 320-324 ◽  
Author(s):  
N. Lee ◽  
G.E. Jang ◽  
C. Kim ◽  
T. Sung ◽  
Y. Han ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ybco Superconductor ◽  
Different Diameters

The effect of impregnation by resin and CNT compound on the mechanical and magnetic properties of YBCO superconductor

2008 ◽  
Vol 468 (15-20) ◽  
pp. 1411-1414 ◽  
Author(s):  
G.E. Jang ◽  
W.S. Oh ◽  
C.J. Kim ◽  
Y.H. Han ◽  
S.Y. Jung ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Ybco Superconductor

scholarly journals Diameter-Controllable Magnetic Properties of Co Nanowire Arrays by Pulsed Electrodeposition

2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
Youwen Yang ◽  
Yanbiao Chen ◽  
Yucheng Wu ◽  
Xiangying Chen ◽  
Mingguang Kong
Keyword(s):  
Magnetic Properties ◽  
Crystal Structures ◽  
Magnetization Reversal ◽  
Nanowire Arrays ◽  
Cylindrical Shape ◽  
Perpendicular Anisotropy ◽  
Alumina Membranes ◽  
Pulsed Electrodeposition ◽  
Different Diameters ◽  
Co Nanowires

The Co nanowires with different diameters were prepared by pulsed electrodeposition into anodic alumina membranes oxide templates. The micrographs and crystal structures of nanowires were studied by FE-SEM, TEM, and XRD. Due to their cylindrical shape, the nanowires exhibit perpendicular anisotropy. The coercivity and loop squareness (Mr/Ms) of Co nanowires depend strongly on the diameter. Both coercivity and Mr/Ms decrease with increasing wire diameter. The behavior of the nanowires is explained briefly in terms of localized magnetization reversal.

The structural, electronic and magnetic properties of iron nanowires with different diameters

2012 ◽  
Vol 38 (12) ◽  
pp. 1129-1132 ◽  
Author(s):  
V. G. Boutko ◽  
A. A. Gusev ◽  
T. N. Shevtsova ◽  
Yu. G. Pashkevich
Keyword(s):  
Magnetic Properties ◽  
Electronic And Magnetic Properties ◽  
Iron Nanowires ◽  
Different Diameters

Solvothermal Synthesis of Single-Crystal Magnetite Hollow Sub-Microspheres: A Novel Formation Mechanism and Magnetic Properties

2016 ◽  
Vol 69 (7) ◽  
pp. 798
Author(s):  
Gongqin Yan ◽  
Guanlin Zhao ◽  
Fei He
Keyword(s):  
Magnetic Properties ◽  
Single Crystal ◽  
Formation Mechanism ◽  
Solvothermal Synthesis ◽  
Shell Thickness ◽  
Ostwald Ripening ◽  
Hollow Spheres ◽  
Diameter Distribution ◽  
Key Factor ◽  
Different Diameters

In this paper, single-crystal magnetite hollow sub-microspheres with a narrow diameter distribution are synthesized through a simple solvothermal process in ethylene glycol in the presence of urea and a small amount of water. The determining role of water in the solvothermal synthesis is studied. It is found that a small amount of water is crucial for the formation of the magnetite hollow spheres. A novel formation mechanism of the magnetite hollow spheres is proposed based on the bubble-assisted Ostwald ripening. It is believed that the appropriate amount of CO2 gas bubbles produced in situ by urea hydrolysis is crucial for the formation of hollow spheres. Because of the existence of gas microbubbles, magnetite solid spheres with a loose core and compact shell form, which is the key factor for the following inside-out Ostwald ripening and the formation of the hollow spheres. Thus, by simple changing of the water dosage, magnetite hollow spheres with different diameters and shell thicknesses are obtained controllably. The magnetic properties of the obtained magnetite hollow spheres are studied. It is found that the saturation magnetization of the magnetite hollow sub-microspheres decreases with the increasing shell thickness, whereas the coercivity and remanent magnetization increase with increasing shell thickness.

Effect of Cu and Gd on Structural and Magnetic Properties of Fe-Co-B-Si-Nb Metallic Glasses

2016 ◽  
Vol 254 ◽  
pp. 60-64 ◽  
Author(s):  
Parthiban Ramasamy ◽  
Mihai Stoica ◽  
Mariana Calin ◽  
Jurgen Eckert
Keyword(s):  
Magnetic Properties ◽  
Crystallization Behavior ◽  
Supercooled Liquid ◽  
Supercooled Liquid Region ◽  
Glass Forming Ability ◽  
Liquid Region ◽  
Scanning Calorimetry ◽  
Glass Forming ◽  
Mold Casting ◽  
Different Diameters

[(Fe0.5Co0.5)0.75B0.2Si0.05]96Nb4}100-x,y(Gdx, Cuy) (x = 0.5, 1 and 2), (y = 0.5) alloys with different diameters were prepared by copper mold casting. The structure, the thermal and the magnetic properties were studied by X-ray diffraction, differential scanning calorimetry and vibrating sample magnetometry, respectively. Minor Cu addition completely changes the crystallization behavior, and also the glass-forming ability decreases because of the decrease in the supercooled liquid region. However, the magnetic properties are significantly improved upon annealing because of the precipitation of (Fe,Co) phase. In case of [(Fe0.5Co0.5)0.75B0.2Si0.05]96Nb4}100-x (Gdx) glass, Gd addition does not change the crystallization behavior. In turn, it increases the supercooled liquid region when compared with [(Fe0.5Co0.5)0.75B0.2Si0.05]96Nb4, but even then the glass-forming ability is reduced (critical glassy diameter dc < 1.5 mm). The saturation magnetization of the glass is also decreased with increasing Gd content.

Sign in / Sign up

Export Citation Format

Share Document