Oscillatory Resonant X-Ray Magnetic Bragg-Peak Signs and Gd Moments Induced by the Fe/Gd Interlayer Exchange Interaction

2002 ◽  
Vol 41 (Part 1, No. 1) ◽  
pp. 103-106 ◽  
Author(s):  
Hiromasa Sano ◽  
Hiroo Hashizume ◽  
Hiroshi Okuda ◽  
Nobuyoshi Hosoito
Keyword(s):  
Exchange Interaction ◽  
Bragg Peak ◽  
X Ray ◽  
Interlayer Exchange

Comparison between the neutron central peak and the x-ray quasi-Bragg peak in pureKMnF3

1990 ◽  
Vol 42 (13) ◽  
pp. 8255-8260 ◽  
Author(s):  
A. Gibaud ◽  
H. You ◽  
S. M. Shapiro ◽  
J. Y. Gesland
Keyword(s):  
Bragg Peak ◽  
Central Peak ◽  
X Ray

scholarly journals Особенности перемагничивания обменно-связанных пленочных структур Tb-Co/FeNi в температурном интервале, включающем точку компенсации ферримагнитного слоя

2021 ◽  
Vol 63 (9) ◽  
pp. 1198
Author(s):  
А.В. Свалов ◽  
В.Н. Лепаловский ◽  
Е.А. Степанова ◽  
И.А. Макарочкин ◽  
В.О. Васьковский ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetron Sputtering ◽  
Exchange Interaction ◽  
Wide Temperature Range ◽  
Magnetization Reversal ◽  
Compensation Temperature ◽  
Zeeman Energy ◽  
Temperature Range ◽  
Interlayer Exchange

The magnetic properties of exchange-coupled Tb-Co/FeNi film structures obtained by magnetron sputtering were studied in a wide temperature range. It was shown that a decrease in the Zeeman energy when approaching the compensation temperature of the ferrimagnetic layer was accompanied by a change in the sequence of magnetization reversal of the layers. The efficiency of the interlayer exchange interaction varies with temperature very little.

scholarly journals Синтез, структура и магнитные свойства многослойных наногетероструктур Fe|MgO|Cr|MgO|Fe

2021 ◽  
Vol 63 (9) ◽  
pp. 1306
Author(s):  
Е.М. Якунина ◽  
Е.А. Кравцов ◽  
Yu.N. Khaydukov ◽  
Н.О. Антропов ◽  
В.В. Проглядо
Keyword(s):  
Magnetic Properties ◽  
High Resolution ◽  
Exchange Interaction ◽  
Magnetic Moments ◽  
Ferromagnetic Material ◽  
Structural Studies ◽  
X Ray ◽  
Structural And Magnetic Properties ◽  
Metal Layers

Layered nanoheterostructures Fe | MgO | Cr | MgO | Fe is an artificial ferromagnetic material in which the exchange interaction of the magnetic moments of Fe layers through intermediate dielectric and metal layers can lead to magnetic configurations that are not realized in the well-studied Fe | MgO | Fe and Fe | Cr | Fe. In this work, we investigated the correlations of the structural and magnetic properties of layered nanoheterostructures Fe (10 nm) | MgO (1.5 nm) | Cr (t nm) | MgO (1.5 nm) | Fe (7 nm) (thickness t = 0.9 and 1.8 nm). Structural studies performed using X-ray diffractometry and high-resolution reflectometry confirmed the formation of a textured structure and revealed its well-defined layered character with sharp interlayer boundaries.

High Resolution X-ray Diffraction for the Characterization of Semiconducting Materials

1989 ◽  
Vol 33 ◽  
pp. 1-11 ◽  
Author(s):  
B. K. Tanner
Keyword(s):  
Bragg Peak ◽  
Thin Layers ◽  
X Ray Diffraction ◽  
Semiconducting Materials ◽  
Multiple Reflections ◽  
X Ray ◽  
Analyzer Crystal ◽  
Glancing Angle ◽  
Heteroepitaxial Layers

AbstractUse of a reference crystal to condition the beam in the double-axis diffractometer permits the Bragg peak width to be reduced to the correlation of the two crystal reflecting ranges. Some recent applications of double axis diffractometry to the study of heteroepitaxial layers are discussed. The advantages of multiple reflections for beam conditioning and the four reflection DuMond monochromator are examined. Glancing incidence and exit diffractometry permits the study of very thin layers, down to a few tens of nanometres in thickness and both synchrotron radiation and skew reflections can be used to tune the glancing angle close to the critical angle. Recent applications of triple-axis diffraction, where an analyzer crystal is used after the specimen, to the study of very thin single epitaxial layers and multiquantum well structures are reviewed.

scholarly journals Relating Linear Energy Transfer to the Formation and Resolution of DNA Repair Foci After Irradiation with Equal Doses of X-ray Photons, Plateau, or Bragg-Peak Protons

2018 ◽  
Vol 19 (12) ◽  
pp. 3779 ◽  
Author(s):  
Sebastian Oeck ◽  
Klaudia Szymonowicz ◽  
Gesa Wiel ◽  
Adam Krysztofiak ◽  
Jamil Lambert ◽  
...  
Keyword(s):  
Dna Damage ◽  
Energy Transfer ◽  
Linear Energy Transfer ◽  
Bragg Peak ◽  
Cultured Cells ◽  
Human Cancer ◽  
Proton Beam Therapy ◽  
X Ray ◽  
Cellular Repair ◽  
Set Up

Proton beam therapy is increasingly applied for the treatment of human cancer, as it promises to reduce normal tissue damage. However, little is known about the relationship between linear energy transfer (LET), the type of DNA damage, and cellular repair mechanisms, particularly for cells irradiated with protons. We irradiated cultured cells delivering equal doses of X-ray photons, Bragg-peak protons, or plateau protons and used this set-up to quantitate initial DNA damage (mainly DNA double strand breaks (DSBs)), and to analyze kinetics of repair by detecting γH2A.X or 53BP1 using immunofluorescence. The results obtained validate the reliability of our set-up in delivering equal radiation doses under all conditions employed. Although the initial numbers of γH2A.X and 53BP1 foci scored were similar under the different irradiation conditions, it was notable that the maximum foci level was reached at 60 min after irradiation with Bragg-peak protons, as compared to 30 min for plateau protons and photons. Interestingly, Bragg-peak protons induced larger and irregularly shaped γH2A.X and 53BP1 foci. Additionally, the resolution of these foci was delayed. These results suggest that Bragg-peak protons induce DNA damage of increased complexity which is difficult to process by the cellular repair apparatus.

Sign in / Sign up

Export Citation Format

Share Document