Nonvolatile switching of magnetostrictive nanodot from single-domain to vortex states by voltage at room temperature

2021 ◽  
Vol 118 (26) ◽  
pp. 262402
Author(s):  
J. H. Liu ◽  
X. K. Yang ◽  
H. Q. Cui ◽  
D. H. Hong ◽  
C. Li ◽  
...  
Keyword(s):  
Room Temperature ◽  
Single Domain ◽  
Vortex States

Introduction of Fine Engineered Domain Configuration into Potassium Niobate Single Crystals

2007 ◽  
Vol 350 ◽  
pp. 89-92
Author(s):  
Keisuke Yokoh ◽  
Tomomitsu Muraishi ◽  
Song Min Nam ◽  
Hirofumi Kakemoto ◽  
Takaaki Tsurumi ◽  
...  
Keyword(s):  
Electric Field ◽  
Single Crystals ◽  
Room Temperature ◽  
Single Domain ◽  
Potassium Niobate ◽  
Field Exposure ◽  
Domain State ◽  
Domain Configuration ◽  
Dc Electric Field ◽  
Direction Of Polarization

To induce fine engineered domain configurations into potassium niobate (KNbO3) single crystals, two kinds of methods were performed, i.e., (1) high DC electric field exposure along the opposite direction of polarization of KNbO3 single-domain crystals at room temperature, and (2) introduction of randomly oriented fine domain configuration by heat treatment at 700 °C and then high DC electric field exposure along [001]c direction of KNbO3 multidomain crystals at room temperature. When the method (1) was performed, finally, the poled KNbO3 crystals became to single-domain state again through the formation of multidomain state. On the other hand, the KNbO3 multidomain crystals were obtained by using the method (2), and an enhancement of piezoelectric-related properties was observed.

Matrix embedded cobalt-carbon nano-cluster magnets: behavior as room temperature single domain magnets

2003 ◽  
Vol 24 (1-3) ◽  
pp. 97-100 ◽  
Author(s):  
N. Nishi ◽  
K. Kosugi ◽  
K. Hino ◽  
T. Yokoyama
Keyword(s):  
Room Temperature ◽  
Single Domain ◽  
Nano Cluster

Near-room temperature single-domain epitaxy of reactively sputtered ZnO films

2013 ◽  
Vol 46 (23) ◽  
pp. 235107 ◽  
Author(s):  
W Chamorro ◽  
D Horwat ◽  
P Pigeat ◽  
P Miska ◽  
S Migot ◽  
...  
Keyword(s):  
Room Temperature ◽  
Single Domain ◽  
Zno Films

Room-temperature magnetoresistance effects of Ag-added Fe3O4 films with single-domain grains

2007 ◽  
Vol 142 (10) ◽  
pp. 595-599 ◽  
Author(s):  
Xiukun Hu ◽  
Meihua Xu ◽  
Xugao Cui ◽  
Shiyuan Zhang
Keyword(s):  
Room Temperature ◽  
Single Domain

Single domain growth and charge ordering of epitaxial YbFe2O4 films

CrystEngComm ◽  
2021 ◽  
Author(s):  
Takumi Sakagami ◽  
Reika Ota ◽  
Jun Kano ◽  
Naoshi Ikeda ◽  
Tatsuo FUJII
Keyword(s):  
Room Temperature ◽  
Electric Polarization ◽  
Charge Ordering ◽  
Single Domain ◽  
Domain Growth ◽  
Rhombohedral Structure ◽  
A Charge

YbFe2O4 is a charge-ordered ferroelectrics that exhibits coupling between magnetization and electric polarization near room temperature, and crystallizes in a rhombohedral structure (R3¯m). This study presents an attempt to fabricate...

scholarly journals Acoustic-Wave-Induced Magnetization Switching of Magnetostrictive Nanomagnets from Single-Domain to Nonvolatile Vortex States

Nano Letters ◽  
2016 ◽  
Vol 16 (9) ◽  
pp. 5681-5687 ◽  
Author(s):  
Vimal Sampath ◽  
Noel D’Souza ◽  
Dhritiman Bhattacharya ◽  
Gary M. Atkinson ◽  
Supriyo Bandyopadhyay ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Single Domain ◽  
Magnetization Switching ◽  
Vortex States ◽  
Wave Induced

scholarly journals Optical properties of Na0.5Bi0.5TiO3 crystals

2019 ◽  
Vol 27 (1) ◽  
pp. 37-40
Author(s):  
T. V. Kruzina ◽  
S. A. Popov ◽  
Yu. N. Potapovich ◽  
A. S. Rutskyi
Keyword(s):  
Domain Structure ◽  
Temperature Interval ◽  
Room Temperature ◽  
Single Domain ◽  
Optical Methods ◽  
Axial Pressure ◽  
Single Domain State ◽  
Linear Behavior ◽  
Domain State ◽  
Pressure Interval

We report some peculiarities of behavior of domain structure and birefringence ∆n of Na0.5Bi0.5TiO3 crystals. Polarization-optical methods are used to study the domain structure and the birefringence ∆n in temperature interval 25°C÷520°C and axial pressure interval 2.5÷60 bar. Single domain state is achieved by application of axial pressure along [100] and [110] directions at temperature near 500°C. Application of axial pressure ~50 bar along [100] direction leads to switching of the samples into anisotropic single domain state. While application of axial pressure ~0.5 bar along [110] direction results in exposition of visually isotropic state and the state is preserved during a cooling process in temperature interval ~500°C÷240°C. In both cases the anisotropic single domain state is observed at room temperature. It is shown that f axial pressure (2.5÷25 bar) application along [110] direction at room temperature leads to a significant increase of the birefringence. It is supposed that both the peculiarities of Δn behavior and the linear behavior of Δn = f(p) are associated with presence of the nanoregions with various orientations of optical indicatrices and their involvement into the orientation process under the action of axial pressure.

Dependence of Intergranular Fracture on Boundary Topography and Cohesion

1973 ◽  
Vol 31 ◽  
pp. 150-151
Author(s):  
J. E. Doherty ◽  
A. F. Giamei ◽  
B. H. Kear ◽  
C. W. Steinke
Keyword(s):  
Grain Boundary ◽  
Room Temperature ◽  
Nickel Base Superalloy ◽  
Boundary Shear ◽  
Room Temperature Ductility ◽  
Solid Solution Matrix ◽  
Nickel Base ◽  
Solution Matrix ◽  
Different Levels ◽  
Base Superalloy

Recently we have been investigating a class of nickel-base superalloys which possess substantial room temperature ductility. This improvement in ductility is directly related to improvements in grain boundary strength due to increased boundary cohesion through control of detrimental impurities and improved boundary shear strength by controlled grain boundary micros true tures.For these investigations an experimental nickel-base superalloy was doped with different levels of sulphur impurity. The micros tructure after a heat treatment of 1360°C for 2 hr, 1200°C for 16 hr consists of coherent precipitates of γ’ Ni3(Al,X) in a nickel solid solution matrix.

Hepatocyte Alterations in Guinea Pigs FED Polychlorinated Biphenyls (PCBs), Dibenzodioxins (PCDD), AND DIBENZOFURANS (PCDF)

1982 ◽  
Vol 40 ◽  
pp. 56-57
Author(s):  
J. N. Turner ◽  
D. N. Collins
Keyword(s):  
Guinea Pigs ◽  
Room Temperature ◽  
Dose Group ◽  
Methyl Cellulose ◽  
Uranyl Acetate ◽  
Target Organ ◽  
Office Building ◽  
Lead Citrate ◽  
Control Groups ◽  
Cooling Fluid

A fire involving an electric service transformer and its cooling fluid, a mixture of PCBs and chlorinated benzenes, contaminated an office building with a fine soot. Chemical analysis showed PCDDs and PCDFs including the highly toxic tetra isomers. Guinea pigs were chosen as an experimental animal to test the soot's toxicity because of their sensitivity to these compounds, and the liver was examined because it is a target organ. The soot was suspended in 0.75% methyl cellulose and administered in a single dose by gavage at levels of 1,10,100, and 500mgm soot/kgm body weight. Each dose group was composed of 6 males and 6 females. Control groups included 12 (6 male, 6 female) animals fed activated carbon in methyl cellulose, 6 males fed methyl cellulose, and 16 males and 10 females untreated. The guinea pigs were sacrificed at 42 days by suffocation in CO2. Liver samples were immediately immersed and minced in 2% gluteraldehyde in cacadylate buffer at pH 7.4 and 4°C. After overnight fixation, samples were postfixed in 1% OsO4 in cacodylate for 1 hr at room temperature, embedded in epon, sectioned and stained with uranyl acetate and lead citrate.

Domain Formation in Synthetic Quartz

1971 ◽  
Vol 29 ◽  
pp. 156-157
Author(s):  
Joseph J. Comer
Keyword(s):  
Electron Beam ◽  
Room Temperature ◽  
Domain Formation ◽  
Synthetic Quartz ◽  
Transmission Electron ◽  
Black Spots ◽  
Diffraction Mode ◽  
Domain Boundaries ◽  
Kikuchi Lines ◽  
Straight Lines

Domains visible by transmission electron microscopy, believed to be Dauphiné inversion twins, were found in some specimens of synthetic quartz heated to 680°C and cooled to room temperature. With the electron beam close to parallel to the [0001] direction the domain boundaries appeared as straight lines normal to <100> and <410> or <510> directions. In the selected area diffraction mode, a shift of the Kikuchi lines was observed when the electron beam was made to traverse the specimen across a boundary. This shift indicates a change in orientation which accounts for the visibility of the domain by diffraction contrast when the specimen is tilted. Upon exposure to a 100 KV electron beam with a flux of 5x 1018 electrons/cm2sec the boundaries are rapidly decorated by radiation damage centers appearing as black spots. Similar crystallographio boundaries were sometimes found in unannealed (0001) quartz damaged by electrons.

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