Phase imaging of magnetic nanostructures using resonant soft x-ray holography

2007 ◽  
Vol 76 (21) ◽  
Author(s):  
A. Scherz ◽  
W. F. Schlotter ◽  
K. Chen ◽  
R. Rick ◽  
J. Stöhr ◽  
...  
Keyword(s):  
Magnetic Nanostructures ◽  
Phase Imaging ◽  
X Ray

Hard x-ray phase imaging and tomography with a grating interferometer

2004 ◽  
Author(s):  
Timm Weitkamp ◽  
Ana Diaz ◽  
Bernd Nohammer ◽  
Franz Pfeiffer ◽  
Torben Rohbeck ◽  
...  
Keyword(s):  
Phase Imaging ◽  
X Ray ◽  
Grating Interferometer

scholarly journals Probing nanoscale behavior of magnetic materials with soft X-ray spectromicroscopy

2012 ◽  
Vol 1 (1) ◽  
pp. 5-15 ◽  
Author(s):  
Peter Fischer ◽  
Charles S. Fadley
Keyword(s):  
Magnetic Properties ◽  
Magnetic Materials ◽  
Spin Dynamics ◽  
Magnetic Nanostructures ◽  
Magnetic Behavior ◽  
Research Area ◽  
X Ray ◽  
Spatially Resolved ◽  
Buried Interfaces ◽  
Analytical Tools

AbstractThe magnetic properties of matter continue to be a vibrant research area driven both by scientific curiosity to unravel the basic physical processes which govern magnetism and the vast and diverse utilization of magnetic materials in current and future devices, e.g., in information and sensor technologies. Relevant length and time scales approach fundamental limits of magnetism and with state-of-the-art synthesis approaches we are able to create and tailor unprecedented properties. Novel analytical tools are required to match these advances and soft X-ray probes are among the most promising ones. Strong and element-specific magnetic X-ray dichroism effects as well as the nanometer wavelength of photons and the availability of fsec short and intense X-ray pulses at upcoming X-ray sources enable unique experimental opportunities for the study of magnetic behavior. This article provides an overview of recent achievements and future perspectives in magnetic soft X-ray spectromicroscopies which permit us to gain spatially resolved insight into the ultrafast spin dynamics and the magnetic properties of buried interfaces of advanced magnetic nanostructures.

Incorporating dark-field information in mesh-based x-ray phase imaging

2021 ◽  
Author(s):  
Uttam Pyakurel ◽  
Desiree D'Moore ◽  
Pikting Cheung ◽  
Bushra Kanwal ◽  
Xiaoyun Zhang ◽  
...  
Keyword(s):  
Dark Field ◽  
Phase Imaging ◽  
X Ray ◽  
Field Information

scholarly journals The Effect of Water Acrylate Dispersion on the Properties of Polymer-Carbon Nanotube Composites / Wpływ Wodnej Dyspersji Akrylanowej Na Właściwości Kompozytów Polimer-Nanorurki Węglowe

2015 ◽  
Vol 60 (4) ◽  
pp. 2715-2720
Author(s):  
P. Zygoń ◽  
M. Gwoździk ◽  
J. Peszke ◽  
Z. Nitkiewicz
Keyword(s):  
Carbon Nanotubes ◽  
Roughness Parameter ◽  
Composition Analysis ◽  
Phase Imaging ◽  
X Ray ◽  
Three Point Bending ◽  
Force Microscopy ◽  
Mode Method ◽  
Nanotube Composites ◽  
Crystallite Sizes

The paper presents properties of polymer composites reinforced with carbon nanotubes (CNT) containing various mixtures of dispersion. Acrylates of different particle size and viscosity were used to produce composites. The mechanical strength of composites was determined by three-point bending tests. The roughness parameter of composites was determined with a profilometer and compared with the roughness parameter determined via atomic force microscopy (AFM). Also X-ray studies (phase composition analysis, crystallite sizes determination) were carried out on these composites. Measurements of the surface topography using the Tapping Mode method were performed, acquiring the data on the height and on the phase imaging. The change of intensity, crystallite size and half-value width of main reflections originating from carbon within the composites have been determined using the X-ray analysis. The density of each obtained composite was determined as well as the resistivity at room temperature. The density of composites is quite satisfactory and ranges from 0.27 to 0.35 g/cm3. Different composites vary not only in strength but also in density. Different properties were achieved by the use of various dispersions. Carbon nanotubes constituting the reinforcement for a polymer composite improve the mechanical properties and conductivity composite.

scholarly journals X-ray linear dichroic ptychography

2021 ◽  
Vol 118 (3) ◽  
pp. e2019068118
Author(s):  
Yuan Hung Lo ◽  
Jihan Zhou ◽  
Arjun Rana ◽  
Drew Morrill ◽  
Christian Gentry ◽  
...  
Keyword(s):  
Tooth Enamel ◽  
Phase Imaging ◽  
Crystalline Materials ◽  
X Ray ◽  
Coral Skeletons ◽  
Mineral Growth ◽  
Multiple Length Scales ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Amorphous Nanoparticle

Biominerals such as seashells, coral skeletons, bone, and tooth enamel are optically anisotropic crystalline materials with unique nanoscale and microscale organization that translates into exceptional macroscopic mechanical properties, providing inspiration for engineering new and superior biomimetic structures. Using Seriatopora aculeata coral skeleton as a model, here, we experimentally demonstrate X-ray linear dichroic ptychography and map the c-axis orientations of the aragonite (CaCO3) crystals. Linear dichroic phase imaging at the oxygen K-edge energy shows strong polarization-dependent contrast and reveals the presence of both narrow (<35°) and wide (>35°) c-axis angular spread in the coral samples. These X-ray ptychography results are corroborated by four-dimensional (4D) scanning transmission electron microscopy (STEM) on the same samples. Evidence of co-oriented, but disconnected, corallite subdomains indicates jagged crystal boundaries consistent with formation by amorphous nanoparticle attachment. We expect that the combination of X-ray linear dichroic ptychography and 4D STEM could be an important multimodal tool to study nano-crystallites, interfaces, nucleation, and mineral growth of optically anisotropic materials at multiple length scales.

scholarly journals X-ray phase imaging reaching clinical uses

2020 ◽  
Vol 79 ◽  
pp. 93-102 ◽  
Author(s):  
Atsushi Momose
Keyword(s):  
Phase Imaging ◽  
X Ray

scholarly journals Imaging evaluation of the cartilage in rheumatoid arthritis patients with an x-ray phase imaging apparatus based on Talbot-Lau interferometry

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hiroyuki Yoshioka ◽  
Yuho Kadono ◽  
Yoon Taek Kim ◽  
Hiromi Oda ◽  
Takashi Maruyama ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Phase Imaging ◽  
Imaging Evaluation ◽  
X Ray

scholarly journals Chemical Solution Deposition of Ordered 2D Arrays of Room-Temperature Ferrimagnetic Cobalt Ferrite Nanodots

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1598 ◽  
Author(s):  
Jin Xu ◽  
Justin Varghese ◽  
Giuseppe Portale ◽  
Alessandro Longo ◽  
Jamo Momand ◽  
...  
Keyword(s):  
Chemical Solution Deposition ◽  
Room Temperature ◽  
Cobalt Ferrite ◽  
Magnetic Nanostructures ◽  
Memory Storage ◽  
Blocking Temperature ◽  
Chemical Solution ◽  
Solution Deposition ◽  
X Ray ◽  
2D Arrays

Over the past decades, the development of nano-scale electronic devices and high-density memory storage media has raised the demand for low-cost fabrication methods of two-dimensional (2D) arrays of magnetic nanostructures. Here, we present a chemical solution deposition methodology to produce 2D arrays of cobalt ferrite (CFO) nanodots on Si substrates. Using thin films of four different self-assembled block copolymers as templates, ordered arrays of nanodots with four different characteristic dimensions were fabricated. The dot sizes and their long-range arrangement were studied with scanning electron microscopy (SEM) and grazing incident small-angle X-ray scattering (GISAXS). The structural evolution during UV/ozone treatment and the following thermal annealing was investigated through monitoring the atomic arrangement with X-ray absorption fine structure spectroscopy (EXAFS) and checking the morphology at each preparation step. The preparation method presented here obtains array types that exhibit thicknesses less than 10 nm and blocking temperatures above room temperature (e.g., 312 K for 20 nm diameter dots). Control over the average dot size allows observing an increase of the blocking temperature with increasing dot diameter. The nanodots present promising properties for room temperature data storage, especially if a better control over their size distribution will be achieved in the future.

scholarly journals Recent Progress in X-ray and Neutron Phase Imaging with Gratings

2020 ◽  
Vol 4 (1) ◽  
pp. 9 ◽  
Author(s):  
Atsushi Momose ◽  
Hidekazu Takano ◽  
Yanlin Wu ◽  
Koh Hashimoto ◽  
Tetsuo Samoto ◽  
...  
Keyword(s):  
Recent Progress ◽  
Time Of Flight ◽  
Imaging Method ◽  
Phase Imaging ◽  
Imaging Methods ◽  
X Ray ◽  
Phase Microscopy ◽  
Grating Fabrication ◽  
Recent Developments ◽  
Time Of Flight Method

Under the JST-ERATO project in progress to develop X-ray and neutron phase-imaging methods together, recent achievements have been selected and reviewed after describing the merit and the principle of the phase imaging method. For X-ray phase imaging, recent developments of four-dimensional phase tomography and phase microscopy at SPring-8, Japan are mainly presented. For neutron phase imaging, an approach in combination with the time-of-flight method developed at J-PARC, Japan is described with the description of new Gd grating fabrication.

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