scholarly journals Size and property bimodality in magnetic nanoparticle dispersions: single domain particles vs. strongly coupled nanoclusters

Nanoscale ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 4227-4235 ◽  
Author(s):  
E. Wetterskog ◽  
A. Castro ◽  
L. Zeng ◽  
S. Petronis ◽  
D. Heinke ◽  
...  
Keyword(s):  
Magnetic Nanoparticle ◽  
Single Domain ◽  
Strongly Coupled ◽  
Nanoparticle Dispersions

scholarly journals Field-dependent dynamic responses from dilute magnetic nanoparticle dispersions

Nanoscale ◽  
2018 ◽  
Vol 10 (4) ◽  
pp. 2052-2066 ◽  
Author(s):  
Jeppe Fock ◽  
Christoph Balceris ◽  
Rocio Costo ◽  
Lunjie Zeng ◽  
Frank Ludwig ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Nanoparticle ◽  
Ac Susceptibility ◽  
Bivariate Distribution ◽  
Dynamic Responses ◽  
Nanoparticle Dispersions ◽  
Field Dependent

AC susceptibility (ACS) and optomagnetic (OM) measurements vs. field and frequency allow determination of the bivariate distribution in moment and size. The obtained correlation provides information on the morphology of the magnetic nanoparticles.

Hysteresis losses of magnetic nanoparticle powders in the single domain size range

2007 ◽  
Vol 308 (2) ◽  
pp. 305-312 ◽  
Author(s):  
S. Dutz ◽  
R. Hergt ◽  
J. Mürbe ◽  
R. Müller ◽  
M. Zeisberger ◽  
...  
Keyword(s):  
Magnetic Nanoparticle ◽  
Size Range ◽  
Domain Size ◽  
Single Domain ◽  
Hysteresis Losses

scholarly journals In-situ investigation of temperature induced agglomeration in non-polar magnetic nanoparticle dispersions by small angle X-ray scattering

Nanoscale ◽  
2021 ◽  
Author(s):  
Christian Appel ◽  
Björn Kuttich ◽  
Tobias Kraus ◽  
Bernd Stühn
Keyword(s):  
Magnetic Nanoparticles ◽  
Small Angle ◽  
Magnetic Nanoparticle ◽  
Length Scale ◽  
X Ray ◽  
X Ray Scattering ◽  
Nanoparticle Dispersions ◽  
In Situ Investigation ◽  
Ray Scattering

Non-polar magnetic nanoparticles exhibit agglomeration upon cooling. This process is followed by in-situ small angle X-ray scattering to assess structural properties of the emerging agglomerates. On the length scale of...

scholarly journals Dipolar interaction and demagnetizing effects in magnetic nanoparticle dispersions: Introducing the mean-field interacting superparamagnet model

2017 ◽  
Vol 95 (13) ◽  
Author(s):  
F. H. Sánchez ◽  
P. Mendoza Zélis ◽  
M. L. Arciniegas ◽  
G. A. Pasquevich ◽  
M. B. Fernández van Raap
Keyword(s):  
Magnetic Nanoparticle ◽  
Mean Field ◽  
Dipolar Interaction ◽  
Nanoparticle Dispersions ◽  
The Mean

High-Temperature First-Order-Reversal-Curve (FORC) Study of Magnetic Nanoparticle Based Nanocomposite Materials

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2669-2674
Author(s):  
B. Dodrill ◽  
P. Ohodnicki ◽  
M. McHenry ◽  
A. Leary
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Magnetic Nanoparticle ◽  
Magnetic Particles ◽  
Nanocomposite Materials ◽  
Single Domain ◽  
Magnetic Interactions ◽  
First Order ◽  
Soils And Sediments ◽  
Properties Of Materials

AbstractFirst-order-reversal-curves (FORCs) are an elegant, nondestructive tool for characterizing the magnetic properties of materials comprising fine (micron- or nano-scale) magnetic particles. FORC measurements and analysis have long been the standard protocol used by geophysicists and earth and planetary scientists investigating the magnetic properties of rocks, soils, and sediments. FORC can distinguish between single-domain, multi-domain, and pseudo single-domain behavior, and it can distinguish between different magnetic mineral species [1]. More recently, FORC has been applied to a wider array of magnetic material systems because it yields information regarding magnetic interactions and coercivity distributions that cannot be obtained from major hysteresis loop measurements alone. In this paper, we will discuss this technique and present high-temperature FORC results for two magnetic nanoparticle materials: CoFe nanoparticles dispersed in a SiO2 matrix, and FeCo-based nanocrystalline amorphous/nanocomposites.

Polarity Determination in Sphalerite and Wurtzite Structures

1990 ◽  
Vol 48 (2) ◽  
pp. 500-501
Author(s):  
Stuart McKernan ◽  
C. Barry Carter
Keyword(s):  
Opposite Polarity ◽  
Single Domain ◽  
Polar Material ◽  
Electron Microscopic ◽  
Dynamical Interaction ◽  
X Ray ◽  
Polarity Determination ◽  
The Absolute ◽  
Microscopic Techniques

The determination of the absolute polarity of a polar material is often crucial to the understanding of the defects which occur in such materials. Several methods exist by which this determination may be performed. In bulk, single-domain specimens, macroscopic techniques may be used, such as the different etching behavior, using the appropriate etchant, of surfaces with opposite polarity. X-ray measurements under conditions where Friedel’s law (which means that the intensity of reflections from planes of opposite polarity are indistinguishable) breaks down can also be used to determine the absolute polarity of bulk, single-domain specimens. On the microscopic scale, and particularly where antiphase boundaries (APBs), which separate regions of opposite polarity exist, electron microscopic techniques must be employed. Two techniques are commonly practised; the first [1], involves the dynamical interaction of hoLz lines which interfere constructively or destructively with the zero order reflection, depending on the crystal polarity. The crystal polarity can therefore be directly deduced from the relative intensity of these interactions.

Strongly coupled nonneutral plasmas : Equilibrium and relaxation in two-component plasmas in Penning-Malmberg trap

2000 ◽  
Vol 10 (PR5) ◽  
pp. Pr5-271-Pr5-274
Author(s):  
H. Totsuji ◽  
K. Tsuruta ◽  
C. Totsuji ◽  
K. Nakano ◽  
T. Kishimoto ◽  
...  
Keyword(s):  
Strongly Coupled ◽  
Nonneutral Plasmas ◽  
Two Component
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