scholarly journals Proposal for a local heating driven spin current generator

2013 ◽  
Vol 103 (17) ◽  
pp. 172401 ◽  
Author(s):  
Sun-Yong Hwang ◽  
Jong Soo Lim ◽  
Rosa López ◽  
Minchul Lee ◽  
David Sánchez
Keyword(s):  
Local Heating ◽  
Spin Current ◽  
Current Generator

Tuning a zigzag SiC nanoribbon as a thermal spin current generator

2D Materials ◽  
2017 ◽  
Vol 4 (3) ◽  
pp. 035001 ◽  
Author(s):  
Peng Jiang ◽  
Xixi Tao ◽  
Hua Hao ◽  
Lingling Song ◽  
Xiaohong Zheng ◽  
...  
Keyword(s):  
Spin Current ◽  
Current Generator

scholarly journals Spin current generator based on topological insulator coupled to ferromagnetic insulators

AIP Advances ◽  
2012 ◽  
Vol 2 (3) ◽  
pp. 032162 ◽  
Author(s):  
M. J. Ma ◽  
M. B. A. Jalil ◽  
S. G. Tan ◽  
Y. Li ◽  
Z. B. Siu
Keyword(s):  
Topological Insulator ◽  
Spin Current ◽  
Current Generator

Spin current generator in a single molecular magnet with spin bias

2018 ◽  
Vol 465 ◽  
pp. 9-13 ◽  
Author(s):  
Pengbin Niu ◽  
Lixiang Liu ◽  
Xiaoqiang Su ◽  
Lijuan Dong ◽  
Hong-Gang Luo
Keyword(s):  
Spin Current ◽  
Molecular Magnet ◽  
Current Generator

scholarly journals Perovskite as a spin current generator

2021 ◽  
Vol 103 (12) ◽  
Author(s):  
Makoto Naka ◽  
Yukitoshi Motome ◽  
Hitoshi Seo
Keyword(s):  
Spin Current ◽  
Current Generator

scholarly journals Wavelength-selective spin-current generator using infrared plasmonic metamaterials

APL Photonics ◽  
2017 ◽  
Vol 2 (10) ◽  
pp. 106103 ◽  
Author(s):  
Satoshi Ishii ◽  
Ken-ichi Uchida ◽  
Thang Duy Dao ◽  
Yoshiki Wada ◽  
Eiji Saitoh ◽  
...  
Keyword(s):  
Spin Current ◽  
Current Generator ◽  
Plasmonic Metamaterials

UHV-TEM studies of laser-induced damage

1991 ◽  
Vol 49 ◽  
pp. 632-633
Author(s):  
T.S. Savage ◽  
R. Ai ◽  
D. Dunn ◽  
L.D. Marks
Keyword(s):  
Surface Science ◽  
Rapid Heating ◽  
Local Heating ◽  
Routine Practice ◽  
Transmission Electron ◽  
Northwestern University ◽  
Laser Induced Damage ◽  
Set Up ◽  
Focusing Lens ◽  
Diffusion Of Impurities

The use of lasers for surface annealing, heating and/or damage has become a routine practice in the study of materials. Lasers have been closely looked at as an annealing technique for silicon and other semiconductors. They allow for local heating from a beam which can be focused and tuned to different wavelengths for specific tasks. Pulsed dye lasers allow for short, quick bursts which can allow the sample to be rapidly heated and quenched. This short, rapid heating period may be important for cases where diffusion of impurities or dopants may not be desirable.At Northwestern University, a Candela SLL - 250 pulsed dye laser, with a maximum power of 1 Joule/pulse over 350 - 400 nanoseconds, has been set up in conjunction with a Hitachi UHV-H9000 transmission electron microscope. The laser beam is introduced into the surface science chamber through a series of mirrors, a focusing lens and a six inch quartz window.

Point-Cathode Electron Gun Using Electron-Beam Bombardment for Cathode Tip Heating

1990 ◽  
Vol 48 (1) ◽  
pp. 198-199
Author(s):  
Ryo Iiyoshi ◽  
Susumu Maruse ◽  
Hideo Takematsu
Keyword(s):  
Electron Beam ◽  
Tungsten Wire ◽  
Local Heating ◽  
Electron Gun ◽  
Original Position ◽  
Beam Power ◽  
Radius Of Curvature ◽  
High Brightness ◽  
Beam Focusing ◽  
Time Operation

Point cathode electron gun with high brightness and long cathode life has been developed. In this gun, a straightened tungsten wire is used as the point cathode, and the tip is locally heated to higher temperatures by electron beam bombardment. The high brightness operation and some findings on the local heating are presented.Gun construction is shown in Fig.l. Small heater assembly (annular electron gun: 5 keV, 1 mA) is set inside the Wehnelt electrode. The heater provides a disk-shaped bombarding electron beam focusing onto the cathode tip. The cathode is the tungsten wire of 0.1 mm in diameter. The tip temperature is raised to the melting point (3,650 K) at the beam power of 5 W, without any serious problem of secondary electrons for the gun operation. Figure 2 shows the cathode after a long time operation at high temperatures, or high brightnesses. Evaporation occurs at the tip, and the tip part retains a conical shape. The cathode can be used for a long period of time. The tip apex keeps the radius of curvature of 0.4 μm at 3,000 K and 0.3 μm at 3,200 K. The gun provides the stable beam up to the brightness of 6.4×106 A/cm2sr (3,150 K) at the accelerating voltage of 50 kV. At 3.4×l06 A/cm2sr (3,040 K), the tip recedes at a slow rate (26 μm/h), so that the effect can be offset by adjusting the Wehnelt bias voltage. The tip temperature is decreased as the tip moves out from the original position, but it can be kept at constant by increasing the bombarding beam power. This way of operation is possible for 10 h. A stepwise movement of the cathode is enough for the subsequent operation. Higher brightness operations with the rapid receding rates of the tip may be improved by a continuous movement of the wire cathode during the operations. Figure 3 shows the relation between the beam brightness, the tip receding rate by evaporation (αis the half-angle of the tip cone), and the cathode life per unit length, as a function of the cathode temperature. The working life of the point cathode is greatly improved by the local heating.

The Role of Computer Modeling in Electrocardiography

1990 ◽  
Vol 29 (04) ◽  
pp. 282-288 ◽  
Author(s):  
A. van Oosterom
Keyword(s):  
Electrical Activity ◽  
Computer Modeling ◽  
Body Surface ◽  
Electrical Current ◽  
The Body ◽  
Volume Conductor ◽  
Current Generator ◽  
Cardiac Electrical Activity ◽  
Source Models

AbstractThis paper introduces some levels at which the computer has been incorporated in the research into the basis of electrocardiography. The emphasis lies on the modeling of the heart as an electrical current generator and of the properties of the body as a volume conductor, both playing a major role in the shaping of the electrocardiographic waveforms recorded at the body surface. It is claimed that the Forward-Problem of electrocardiography is no longer a problem. Several source models of cardiac electrical activity are considered, one of which can be directly interpreted in terms of the underlying electrophysiology (the depolarization sequence of the ventricles). The importance of using tailored rather than textbook geometry in inverse procedures is stressed.

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