scholarly journals Influence of diffuse interfaces on the magnetoresistance in trilayer magnetic structures

2019 ◽  
Vol 1389 ◽  
pp. 012155
Author(s):  
Marina V. Mamonova ◽  
Vladimir V. Prudnikov ◽  
Pavel V. Prudnikov ◽  
Anna A. Samoshilova
Keyword(s):  
Magnetic Structures ◽  
Diffuse Interfaces

Contrast of Filament Bright Rims

1994 ◽  
Vol 144 ◽  
pp. 365-367
Author(s):  
E. V. Kononovich ◽  
O. B. Smirnova ◽  
P. Heinzel ◽  
P. Kotrč
Keyword(s):  
High Altitude ◽  
Line Profile ◽  
Line Center ◽  
Magnetic Structures ◽  
The Mean

AbstractThe Hα filtergrams obtained at Tjan-Shan High Altitude Observatory near Alma-Ata (Moscow University Station) were measured in order to specify the bright rims contrast at different points along the line profile (0.0; ± 0.25; ± 0.5; ± 0.75 and ± 1.0 Å). The mean contrast value in the line center is about 25 percent. The bright rims interpretation as the bases of magnetic structures supporting the filaments is suggested.

Dislocations, Ordering and Antiferromagnetic Domains in MnO

1970 ◽  
Vol 28 ◽  
pp. 522-523
Author(s):  
D. J. Barber ◽  
R. G. Evans
Keyword(s):  
Electron Diffraction ◽  
Single Crystal ◽  
Optical Microscopy ◽  
Defect Chemistry ◽  
Magnetic Structures ◽  
Optically Transparent ◽  
Magnetic Features ◽  
Antiferromagnetic Domains

Manganese (II) oxide, MnO, in common with CoO, NiO and FeO, possesses the NaCl structure and shows antiferromagnetism below its Neel point, Tn∼ 122 K. However, the defect chemistry of the four oxides is different and the magnetic structures are not identical. The non-stoichiometry in MnO2 small (∼2%) and below the Tn the spins lie in (111) planes. Previous work reported observations of magnetic features in CoO and NiO. The aim of our work was to find explanations for certain resonance results on antiferromagnetic MnO.Foils of single crystal MnO were prepared from shaped discs by dissolution in a mixture of HCl and HNO3. Optical microscopy revealed that the etch-pitted foils contained cruciform-shaped precipitates, often thick and proud of the surface but red-colored when optically transparent (MnO is green). Electron diffraction and probe microanalysis indicated that the precipitates were Mn2O3, in contrast with recent findings of Co3O4 in CoO.

New type of domain boundaries in multilayer magnetic structures

1999 ◽  
Vol 169 (8) ◽  
pp. 922 ◽  
Author(s):  
Aleksandr I. Morozov ◽  
Aleksandr S. Sigov
Keyword(s):  
Magnetic Structures ◽  
Domain Boundaries ◽  
New Type

scholarly journals Effect of Reaction Time on Microwave Absorption Properties of Fe3O4 Hollow Spheres Synthesized via Ostwald Ripening

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2921 ◽  
Author(s):  
Wei Huang ◽  
Yujiang Wang ◽  
Shicheng Wei ◽  
Bo Wang ◽  
Yi Liang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Microwave Absorption ◽  
Ostwald Ripening ◽  
Impedance Matching ◽  
Hollow Spheres ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Magnetic Structures ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Hollow magnetic structures have great potential to be used in the microwave absorbing field. Herein, Fe3O4 hollow spheres with different levels of hollowness were synthesized by the hydrothermal method under Ostwald ripening effect. In addition to their microstructures, the microwave absorption properties of such spheres were investigated. The results show that the grain size and hollowness of Fe3O4 hollow spheres both increase as the reaction time increases. With increasing hollowness, the attenuation ability of electromagnetic wave of Fe3O4 spheres increases first and then decreases, finally increases sharply after the spheres break down. Samples with strong attenuation ability can achieve good impedance matching, which it does preferentially as the absorber thickness increases. Fe3O4 hollow spheres show the best microwave absorption performance when the reaction time is 24 h. The minimum reflection loss (RL (min)) can reach −40 dB, while the thickness is only 3.2 mm.

Sol–gel magnetite inks for inkjet printing

2019 ◽  
Vol 7 (21) ◽  
pp. 6426-6432 ◽  
Author(s):  
Denis S. Kolchanov ◽  
Vladislav Slabov ◽  
Kirill Keller ◽  
Ekaterina Sergeeva ◽  
Mikhail V. Zhukov ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Sol Gel ◽  
Device Fabrication ◽  
Magnetic Device ◽  
Magnetic Structures

The article describes an easy-to-implement and print-ready composition for inkjet printing of magnetic structures, which can be used for security printing, coding, and marking, magnetic device fabrication or creation of micro-antennas.

ChemInform Abstract: Crystal and Magnetic Structures of the Oxide Sulfides CaCoSO and BaCoSO.

ChemInform ◽  
2016 ◽  
Vol 47 (17) ◽  
Author(s):  
Edward J. T. Salter ◽  
Jack N. Blandy ◽  
Simon J. Clarke
Keyword(s):  
Magnetic Structures ◽  
Crystal And Magnetic Structures

scholarly journals Influence of Fe doping on the Yb valence state and the magnetic structures in HoFe6Sn6-type YbMn6−yFeySn6 alloys (y ≤ 1.00)

2021 ◽  
Vol 875 ◽  
pp. 160091
Author(s):  
A. Magnette ◽  
L. Eichenberger ◽  
L.V.B. Diop ◽  
G. Venturini ◽  
L. Nataf ◽  
...  
Keyword(s):  
Valence State ◽  
Fe Doping ◽  
Magnetic Structures

New polarized neutron diffraction setup for precise high-field investigations of magnetic structures up to 8 T at MLZ

2021 ◽  
pp. 1-1
Author(s):  
Vladimir Hutanu ◽  
Henrik Thoma ◽  
Hao Deng ◽  
Georg Brandl ◽  
Alexander Weber ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
High Field ◽  
Magnetic Structures ◽  
Field Investigations ◽  
Polarized Neutron

scholarly journals Magnetic Nanodiscs—A New Promising Tool for Microsurgery of Malignant Neoplasms

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1459
Author(s):  
Tatiana N. Zamay ◽  
Vladimir S. Prokopenko ◽  
Sergey S. Zamay ◽  
Kirill A. Lukyanenko ◽  
Olga S. Kolovskaya ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Remote Control ◽  
Tumor Cells ◽  
Biological Effects ◽  
Malignant Neoplasms ◽  
Rotating Magnetic Fields ◽  
Magnetic Structures ◽  
Promising Tool

Magnetomechanical therapy is one of the most perspective directions in tumor microsurgery. According to the analysis of recent publications, it can be concluded that a nanoscalpel could become an instrument sufficient for cancer microsurgery. It should possess the following properties: (1) nano- or microsized; (2) affinity and specificity to the targets on tumor cells; (3) remote control. This nano- or microscalpel should include at least two components: (1) a physical nanostructure (particle, disc, plates) with the ability to transform the magnetic moment to mechanical torque; (2) a ligand—a molecule (antibody, aptamer, etc.) allowing the scalpel precisely target tumor cells. Literature analysis revealed that the most suitable nanoscalpel structures are anisotropic, magnetic micro- or nanodiscs with high-saturation magnetization and the absence of remanence, facilitating scalpel remote control via the magnetic field. Additionally, anisotropy enhances the transmigration of the discs to the tumor. To date, four types of magnetic microdiscs have been used for tumor destruction: synthetic antiferromagnetic P-SAF (perpendicular) and SAF (in-plane), vortex Py, and three-layer non-magnetic–ferromagnet–non-magnetic systems with flat quasi-dipole magnetic structures. In the current review, we discuss the biological effects of magnetic discs, the mechanisms of action, and the toxicity in alternating or rotating magnetic fields in vitro and in vivo. Based on the experimental data presented in the literature, we conclude that the targeted and remotely controlled magnetic field nanoscalpel is an effective and safe instrument for cancer therapy or theranostics.

scholarly journals Electromagnetic theory of helicoidal dichroism in reflection from magnetic structures

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Mauro Fanciulli ◽  
David Bresteau ◽  
Mekha Vimal ◽  
Martin Luttmann ◽  
Maurizio Sacchi ◽  
...  
Keyword(s):  
Electromagnetic Theory ◽  
Magnetic Structures
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