Ordered Three-Dimensional Arrays of Monodispersed Mn3O4 Nanoparticles with a Core–Shell Structure and Spin-Glass Behavior

2007 ◽  
Vol 46 (21) ◽  
pp. 3946-3950 ◽  
Author(s):  
Feng Jiao ◽  
Andrew Harrison ◽  
Peter G. Bruce
Keyword(s):  
Spin Glass ◽  
Shell Structure ◽  
Three Dimensional ◽  
Core Shell ◽  
Spin Glass Behavior ◽  
Core Shell Structure ◽  
Mn3o4 Nanoparticles ◽  
Glass Behavior

scholarly journals Low-Diffusion Fricke Gel Dosimeters with Core-Shell Structure Based on Spatial Confinement

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3932
Author(s):  
Wei Zhang ◽  
Kaikai Wang ◽  
Yufeng Zeng ◽  
Xiaodan Hu ◽  
Xiaohong Zhang ◽  
...  
Keyword(s):  
Shell Structure ◽  
Three Dimensional ◽  
Field Size ◽  
Core Shell ◽  
Dose Verification ◽  
Ion Diffusion ◽  
Spatial Confinement ◽  
The Core ◽  
Important Challenge ◽  
Core Shell Structure

The diffusion of ferric ions is an important challenge to limit the application of Fricke gel dosimeters in accurate three-dimensional dose verification of modern radiotherapy. In this work, low-diffusion Fricke gel dosimeters, with a core-shell structure based on spatial confinement, were constructed by utilizing microdroplet ultrarapid freezing and coating technology. Polydimethylsiloxane (PDMS), with its excellent hydrophobicity, was coated on the surface of the pellets. The concentration gradient of the ferric ion was realized through shielding half of a Co-60 photon beam field size, and ion diffusion was measured by both ultraviolet-visible spectrophotometry and magnetic resonance imaging. No diffusion occurred between the core-shell pellets, even at 96 h after irradiation, and the diffusion length at the irradiation boundary was limited to the diameter (2–3 mm) of the pellets. Furthermore, Monte Carlo calculations were conducted to study dosimetric properties of the core-shell dosimeter, which indicated that a PDMS shell hardly affected the performance of the dosimeter.

Three-dimensional Heisenberg spin-glass behavior in SrFe0.90Co0.10O3.0

2012 ◽  
Vol 86 (6) ◽  
Author(s):  
J. Lago ◽  
S. J. Blundell ◽  
A. Eguia ◽  
M. Jansen ◽  
T. Rojo
Keyword(s):  
Spin Glass ◽  
Three Dimensional ◽  
Heisenberg Spin ◽  
Spin Glass Behavior ◽  
Glass Behavior

Spin-glass behavior in a three-dimensional antiferromagnet ordered phase: Magnetic structure ofCo2(OH)(PO4)

2002 ◽  
Vol 66 (9) ◽  
Author(s):  
J. M. Rojo ◽  
J. L. Mesa ◽  
L. Lezama ◽  
J. L. Pizarro ◽  
M. I. Arriortua ◽  
...  
Keyword(s):  
Spin Glass ◽  
Magnetic Structure ◽  
Three Dimensional ◽  
Spin Glass Behavior ◽  
Glass Behavior

Stabilization of surface spin glass behavior in core-shell Fe67Co33–CoFe2O4 nanoparticles

2010 ◽  
Vol 108 (6) ◽  
pp. 063921 ◽  
Author(s):  
G. Hassnain Jaffari ◽  
S. Rizwan Ali ◽  
S. K. Hasanain ◽  
Gernot Güntherodt ◽  
S. Ismat Shah
Keyword(s):  
Spin Glass ◽  
Core Shell ◽  
Cofe2o4 Nanoparticles ◽  
Spin Glass Behavior ◽  
Surface Spin ◽  
Glass Behavior
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