scholarly journals Artificial laminar oxide multiferroic magnetoelectric thin film structures - Elaboration methods and study by synchrotron radiation techniques

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
C. Mocuta ◽  
P. Ohresser ◽  
A. Barbier
Keyword(s):  
Thin Films ◽  
Synchrotron Radiation ◽  
Epitaxial Film ◽  
Magnetic Circular Dichroism ◽  
Ferroelectric Properties ◽  
Strain Engineering ◽  
Elastic Behavior ◽  
X Ray ◽  
Synchrotron Radiation Techniques ◽  
X Ray Absorption

Nanometric laminar two-dimensional artificial multiferroic oxide thin films can be elaborated using spinel ferrites and perovskite ferroelectrics like CoFe2O4 and BaTiO3. Such materials can retain their individual ferromagnetic or ferroelectric properties. In the thin epitaxial film regime a cross coupling of these properties is possible thanks to strain engineering. After introducing the concepts supporting artificial multiferroic laminar structures, the growth of strained BaTiO3 thin films and the growth of subsequent Co-ferrites layers will be detailed. With respect to the relative film thickness, a detailed understanding of the elastic behavior of these films will be proposed based on the characterization using several synchrotron radiation techniques including x-ray specular and off-specular diffraction, x-ray absorption spectroscopy, as well as x-ray magnetic circular dichroism.

Study on Effects of Heavy Ion Irradiation on CeO2 by Using Synchrotron Radiation X-Ray Absorption Spectroscopy -as a Simulation Study for Radiation Damage in High-Burnup Light Water Reactor Fuels-

2007 ◽  
Vol 1043 ◽  
Author(s):  
Hirotaka Ohno ◽  
Daiju Matsumura ◽  
Yasuo Nishihata ◽  
Jun'ichiro Mizuki ◽  
Norito Ishikawa ◽  
...  
Keyword(s):  
Thin Films ◽  
Synchrotron Radiation ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Waller Factor ◽  
X Ray ◽  
Debye Waller Factor ◽  
Atomic Distance ◽  
Exafs Measurement ◽  
X Ray Absorption

AbstractCeO2 thin films were irradiated with 200MeV Xe ions. Effects of the irradiation were studied by using Extended X-ray Absorption Fine Structure (EXAFS) measurement at SPring8 synchrotron radiation facility. EXAFS spectra for the irradiated thin films near the Ce K-edge show that the coordination number for oxygen atoms around Ce atom decreases and that the Ce-O Debye-Waller factor increases by the irradiation. The atomic distance between oxygen atom and Ce atom does not vary within the accuracy of EXAFS measurement. The effect of high density electronic excitation on the structure of CeO2 is discussed.

X-ray absorption spectroscopy and magnetic circular dichroism of the Mn-ferrite nanocrystalline thin films

2001 ◽  
Vol 90 (5) ◽  
pp. 2511-2516 ◽  
Author(s):  
L. Štichauer ◽  
A. Mirone ◽  
S. Turchini ◽  
T. Prosperi ◽  
S. Zennaro ◽  
...  
Keyword(s):  
Thin Films ◽  
Circular Dichroism ◽  
Absorption Spectroscopy ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm ◽  
Nanocrystalline Thin Films

scholarly journals Synchrotron Radiation Spectroscopic Techniques as Tools for the Medicinal Chemist: Microprobe X-Ray Fluorescence Imaging, X-Ray Absorption Spectroscopy, and Infrared Microspectroscopy

2012 ◽  
Vol 65 (3) ◽  
pp. 204 ◽  
Author(s):  
Carolyn Therese Dillon
Keyword(s):  
Synchrotron Radiation ◽  
Fluorescence Spectroscopy ◽  
Absorption Spectroscopy ◽  
Therapeutic Agents ◽  
Spectroscopic Techniques ◽  
X Ray ◽  
Infrared Microspectroscopy ◽  
Radiation Sources ◽  
Synchrotron Radiation Techniques ◽  
X Ray Absorption

This review updates the recent advances and applications of three prominent synchrotron radiation techniques, microprobe X-ray fluorescence spectroscopy/imaging, X-ray absorption spectroscopy, and infrared microspectroscopy, and highlights how these tools are useful to the medicinal chemist. A brief description of the principles of the techniques is given with emphasis on the advantages of using synchrotron radiation-based instrumentation rather than instruments using typical laboratory radiation sources. This review focuses on several recent applications of these techniques to solve inorganic medicinal chemistry problems, focusing on studies of cellular uptake, distribution, and biotransformation of established and potential therapeutic agents. The importance of using these synchrotron-based techniques to assist the development of, or validate the chemistry behind, drug design is discussed.

scholarly journals Effect of thickness and Si substrate morphology in La0.7Sr0.3MnO3/Si thin films

2014 ◽  
Vol 70 (a1) ◽  
pp. C1532-C1532
Author(s):  
Hsiao-Tsu Wang ◽  
Mau- Kuen Wu ◽  
Yu-Cheng Shao ◽  
Yu-Fu Wang ◽  
Shang-Hsien Hsieh ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Electronic Structures ◽  
Magnetic Circular Dichroism ◽  
Magnetic Behavior ◽  
Si Substrate ◽  
Edge Structure ◽  
X Ray ◽  
X Ray Absorption ◽  
Different Thickness

Investigation has been made on atomic, electronic structures and magnetic properties of La0.7Sr0.3MnO3 (LSMO) on Si substrate. The effect of different thickness of LSMO and different morphological [flat and nano-pyramid (NP)] of Si substrate are studied in present work. The result of Mn K-edge extended x-ray absorption fine structure indicates the more disorder of local atomic structure of first shell (Mn-O bound) in the thinner LSMO/Si film. The Mn L3,2-edge x-ray absorption near-edge structure shows the presence of Mn2+ ion on the sample. Furthermore, the Mn L3,2-edge x-ray magnetic circular dichroism reveals that the thinner film (LSMO/Si) has highest magnetic moment, in comparison to that of thick LSMO/Si and LSMO/Si-NP samples. This finding suggests that the appearance Mn2+ may play an important role in magnetic behavior of hetero-junction LSMnO/Si and Si-NP.

X-ray absorption and magnetic circular dichroism characterization of Fe-doped thin films

2013 ◽  
Vol 333 ◽  
pp. 130-133 ◽  
Author(s):  
Enju Sakai ◽  
Kenta Amemiya ◽  
Akira Chikamatsu ◽  
Yasushi Hirose ◽  
Toshihiro Shimada ◽  
...  
Keyword(s):  
Thin Films ◽  
Circular Dichroism ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
X Ray Absorption ◽  
Circular Dichroïsm
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