Zero-field spin torque oscillation in Co2(Fe, Mn)Si with a point contact geometry

2015 ◽  
Vol 106 (9) ◽  
pp. 092406 ◽  
Author(s):  
T. Yamamoto ◽  
T. Seki ◽  
T. Kubota ◽  
H. Yako ◽  
K. Takanashi
Keyword(s):  
Point Contact ◽  
Contact Geometry ◽  
Spin Torque ◽  
Zero Field

Stm Studies at Electrochemically Controlled Interfaces

1994 ◽  
Vol 332 ◽  
Author(s):  
S.M. Lindsay ◽  
J. Pan ◽  
T.W. Jing
Keyword(s):  
Electron Tunneling ◽  
Point Contact ◽  
Localized States ◽  
Scanning Tunneling ◽  
Zero Field ◽  
Tunneling Microscopy ◽  
Dna Oligomers ◽  
Synthetic Dna ◽  
Quantum Point

ABSTRACTWe use electrochemical methods to control the adsorption of molecules onto an electrode for imaging in-situ by scanning tunneling microscopy. Measurements of the barrier for electron tunneling show that the mechanism of electron transfer differs from vacuum tunneling. Barriers depend upon the direction of electron tunneling, indicating the presence of permanently aligned dipoles in the tunnel gap. We attribute a sharp dip in the barrier near zero field to induced polarization. We propose a ‘tunneling’ process consisting of two parts: One is delocalization of quantum-coherent states in parts of the molecular adlayer that hybridize strongly (interaction ≥ kT) with Bloch states in the metal. This gives rise to a quantum-point-contact conductance, Gc ≤ 2e2/h at a height zo. The other part comes from the exponential decay of the tails of localized states, G = Gc exp{−2K(z − z0)}. Because measured decay lengths, (2K‘)−1, are small (≈ 1 Å), STM contrast is dominated by the contour along which G[z0 (x,y)] = Gc. Measured changes in z0 are used to calculate images which are in reasonable agreement with observations. We illustrate this with images of synthetic DNA oligomers.

Quantum hall effect in Ge1-XSiX/(111)Ge MQW samples of non-standard six-point contact geometry

1995 ◽  
Vol 17 (3) ◽  
pp. 301
Author(s):  
B.A. Aronzon ◽  
A.L. Chernov ◽  
L. Essaleh ◽  
J. Galibert ◽  
J. Leotin ◽  
...  
Keyword(s):  
Hall Effect ◽  
Quantum Hall Effect ◽  
Quantum Hall ◽  
Point Contact ◽  
Contact Geometry

Direct observation of the formation and destruction of the inverted continuous oil phase in the micro-outlet region achieved by the confined diluted O/W emulsion stream

Soft Matter ◽  
2014 ◽  
Vol 10 (40) ◽  
pp. 7946-7951 ◽  
Author(s):  
Liran Ma ◽  
Xuefeng Xu ◽  
Chenhui Zhang ◽  
Jianbin Luo
Keyword(s):  
Direct Observation ◽  
Point Contact ◽  
Contact Geometry ◽  
Solid Surfaces ◽  
Emulsion Droplets ◽  
Oil In Water

We demonstrate a direct observation of the oil-in-water (O/W) emulsion droplets in a confined point contact geometry, to shed new light on the mechanism of the interaction between emulsion and solid surfaces under confinement.

Analysis of Wheel/Rail Contact Geometry in Turnout Section

2009 ◽  
Author(s):  
Hiroyuki Sugiyama ◽  
Yoshimitsu Tanii ◽  
Yoshihiro Suda
Keyword(s):  
Point Contact ◽  
Numerical Procedure ◽  
Contact Geometry ◽  
Cross Sectional ◽  
Numerical Examples ◽  
Contact Points ◽  
Contact Configuration

In this investigation, a numerical procedure that can be used for the analysis of wheel/rail two-point contact geometries in turnout sections is developed. In turnout section, the tongue rail changes its shape along the track. Cross-sectional shapes of the tongue rail, therefore, need to be generated by interpolations along the rail and these profiles are used to determine the location of contact points for given location of wheelset along the track trajectory. Numerical examples of wheel/rail contact in point section are presented in order to demonstrate the use of the procedure developed in this investigation and the effect of wheel profiles on the contact configuration in turnout section is discussed.

Wheel/Rail Two-Point Contact Geometry With Back-of-Flange Contact

2007 ◽  
Author(s):  
Hiroyuki Sugiyama ◽  
Yoshihiro Suda
Keyword(s):  
Dimensional Analysis ◽  
Three Dimensional ◽  
Point Contact ◽  
Numerical Procedure ◽  
Contact Geometry ◽  
Light Rail ◽  
Contact Algorithm ◽  
Rail Vehicle ◽  
Contact Points ◽  
Contact Formulation

In this investigation, a numerical procedure that can be used for the three-dimensional analysis of wheel and rail contact geometry is developed using the constraint contact formulation. The locations of contact points are determined for given lateral and yaw displacements of a wheelset when one-point contact is considered for each wheel, while these two displacements are no longer independent when the two-point contact occurs. A systematic procedure for predicting the flange as well as the back-of-flange contact points is developed and used for the two-point contact analysis of wheel and rail. Numerical results that involve tread, flange, and back-of-flange contacts are presented in order to demonstrate the use of the contact algorithm developed in this investigation. In particular, the back-of-flange contact is discussed for assessing contact configurations of wheel and grooved rail in Light Rail Vehicle (LRV) applications.

scholarly journals Zero-field precession and hysteretic threshold currents in a spin torque nano device with tilted polarizer

2009 ◽  
Vol 11 (10) ◽  
pp. 103028 ◽  
Author(s):  
Yan Zhou ◽  
S Bonetti ◽  
C L Zha ◽  
Johan Åkerman
Keyword(s):  
Spin Torque ◽  
Zero Field

A Generalized Differential Colorimetric Interferometry Method: Extension to the Film Thickness Measurement of Any Point Contact Geometry

2018 ◽  
Vol 61 (4) ◽  
pp. 648-660 ◽  
Author(s):  
Jean-David Wheeler ◽  
Jérôme Molimard ◽  
Nicolas Devaux ◽  
David Philippon ◽  
Nicolas Fillot ◽  
...  
Keyword(s):  
Film Thickness ◽  
Point Contact ◽  
Contact Geometry ◽  
Thickness Measurement ◽  
Interferometry Method ◽  
Generalized Differential ◽  
Film Thickness Measurement
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