Imaging Magnetic Nanostructures by Resonant X-Ray Holography

2006 ◽  
Author(s):  
S. Eisebitt ◽  
J. Luning ◽  
O. Hellwig ◽  
W.F. Schlotter ◽  
C. Gunther ◽  
...  
Keyword(s):  
Magnetic Nanostructures ◽  
X Ray

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.

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.

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

scholarly journals A full-field transmission x-ray microscope for time-resolved imaging of magnetic nanostructures

2016 ◽  
Author(s):  
J. Ewald ◽  
P. Wessels ◽  
M. Wieland ◽  
T. Nisius ◽  
A. Vogel ◽  
...  
Keyword(s):  
Magnetic Nanostructures ◽  
Time Resolved ◽  
Full Field ◽  
X Ray ◽  
Time Resolved Imaging

scholarly journals 3D reconstruction of magnetization from dichroic soft X-ray transmission tomography

2018 ◽  
Vol 25 (4) ◽  
pp. 1144-1152 ◽  
Author(s):  
Aurelio Hierro-Rodriguez ◽  
Doga Gürsoy ◽  
Charudatta Phatak ◽  
Carlos Quirós ◽  
Andrea Sorrentino ◽  
...  
Keyword(s):  
Vector Field ◽  
Tomographic Reconstruction ◽  
Linear Equations ◽  
Three Dimensional ◽  
Magnetic Nanostructures ◽  
Reconstruction Method ◽  
Transmission Tomography ◽  
X Ray ◽  
Magnetic Imaging ◽  
Magnetic Dichroism

The development of magnetic nanostructures for applications in spintronics requires methods capable of visualizing their magnetization. Soft X-ray magnetic imaging combined with circular magnetic dichroism allows nanostructures up to 100–300 nm in thickness to be probed with resolutions of 20–40 nm. Here a new iterative tomographic reconstruction method to extract the three-dimensional magnetization configuration from tomographic projections is presented. The vector field is reconstructed by using a modified algebraic reconstruction approach based on solving a set of linear equations in an iterative manner. The application of this method is illustrated with two examples (magnetic nano-disc and micro-square heterostructure) along with comparison of error in reconstructions, and convergence of the algorithm.

scholarly journals Lensless imaging of magnetic nanostructures by X-ray spectro-holography

Nature ◽  
2004 ◽  
Vol 432 (7019) ◽  
pp. 885-888 ◽  
Author(s):  
S. Eisebitt ◽  
J. Lüning ◽  
W. F. Schlotter ◽  
M. Lörgen ◽  
O. Hellwig ◽  
...  
Keyword(s):  
Magnetic Nanostructures ◽  
Lensless Imaging ◽  
X Ray

scholarly journals The contribution of Diamond Light Source to the study of strongly correlated electron systems and complex magnetic structures

2015 ◽  
Vol 373 (2036) ◽  
pp. 20130148 ◽  
Author(s):  
P. G. Radaelli ◽  
S. S. Dhesi
Keyword(s):  
Light Source ◽  
Magnetic Nanostructures ◽  
Strongly Correlated ◽  
Comprehensive Overview ◽  
Strongly Correlated Electron ◽  
Correlated Electron Systems ◽  
X Ray ◽  
Strongly Correlated Materials ◽  
Magnetic Imaging ◽  
Correlated Electron

We review some of the significant contributions to the field of strongly correlated materials and complex magnets, arising from experiments performed at the Diamond Light Source (Harwell Science and Innovation Campus, Didcot, UK) during the first few years of operation (2007–2014). We provide a comprehensive overview of Diamond research on topological insulators, multiferroics, complex oxides and magnetic nanostructures. Several experiments on ultrafast dynamics, magnetic imaging, photoemission electron microscopy, soft X-ray holography and resonant magnetic hard and soft X-ray scattering are described.

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