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Physicists observe an exotic “multiferroic” state in an atomically thin material（图）
原子薄材料 “多铁性”状态 磁存储设备
2023/6/7
MIT physicists have discovered an exotic “multiferroic” state in a material that is as thin as a single layer of atoms. Their observation is the first to confirm that multiferroic properties can exist...
Optical thin films are today involved in numerous optical systems where they constitute a key to their ultimate performance. For most applications, high accuracy is required on both the optical and no...
Thin photodetector could increase performance without adding bulk
Thin photodetector increase performance adding bulk
2017/7/24
In today’s increasingly powerful electronics, tiny materials are a must as manufacturers seek to increase performance without adding bulk.Smaller also is better for optoelectronic devices — like camer...
Scientists have greatly expanded the range of functional temperatures for ferroelectrics, a key material used in a variety of everyday applications, by creating the first-ever polarization gradient in...
New thin transparent film could improve electronics and solar cells
New thin transparent film improve electronics solar cells
2017/7/20
A team of researchers, led by the University of Minnesota, have discovered a new nano-scale thin film material with the highest-ever conductivity in its class. The new material could lead to smaller, ...
On solutions of Maxwell’s equations with dipole sources over a thin conducting film
solutions of Maxwell’s equations dipole sources conducting film
2015/10/16
We derive and interpret solutions of time-harmonic Maxwell’s equations with a vertical and a horizontal electric dipole near a planar, thin conducting film, e.g. Graphene sheet, lying between two unbo...
Buckling thin disks and ribbons with non-Euclidean metrics
Local swelling properties of polymer thin film film swelling
2014/12/19
I consider the problem of a thin membrane on which a metric has been prescribed, for example by lithographically controlling the local swelling properties of a polymer thin film. While any amount of s...
Wrinkling Of Floating Thin Polymer Films
Pure sciences Cascade Deformation Polymers Thin films Wrinkling
2014/11/20
This thesis presents an extensive study of wrinkling of thin polystyrene films, tens of nanometers in thickness, floating on the surface of water or water modified with surfactant.First, we study the ...
Swelling and Folding as Mechanisms of 3D Shape Formation in Thin Elastic Sheets
elasticity folding geometry origami swelling thin sheets
2014/11/20
We work with two different mechanisms to generate geometric frustration on thin elastic sheets; isotropic differential growth and folding. We describe how controlled growth and prescribing folding pat...
PEBSI - A Monte Carlo simulator for bremsstrahlung arising from electrons colliding with thin solid-state targets
Monte Carlo simulation polarized electrons bremsstrahlung polarization target-thickness effects hard x-ray
2012/5/31
We present a Monte Carlo code dedicated to the simulation of bremsstrahlung arising in collisions of polarized electrons with thin target foils. The program consists of an electron transport algorithm...
Two type of 180 domain walls on a 115 nm cobalt film are observed by magnetic force microscopy.The surface Neel wall on top of an asymmetric Bloch wall is found inbomogeneous with the width estimated ...
Geometric shape dependence of coercivity for patterned magnetic thin films
Coercivity E-beam lithography Micro-structure Shaped-dependence Canting
2011/11/30
The micro-strips with patterned magnetic domains using electron beam lithography have been made to study the geometric shape dependence of coercivity. The size of the micro-strip is 10 lm]30 lm with 0...
Relaxation of pinned domains in patterned magnetic thin films
Magnetic pinning E-beam lithography Domain expansion Domain wall motion
2011/11/30
We have shown in previous papers that the magnetic domains could be pinned inside the arti"cially patterned hole arrays under suitable geometry aspect ratio. Nevertheless, we have found that if we rev...
Organic thin-film transistors with reduced photosensitivity
Organic Photosensitivity Nanoparticle Dielectrics Thin-film transistors
2011/11/24
Organic thin-film transistors with a minimal threshold voltage shift and a more stable photocurrent under illuminated conditions can be made by embedding titanium dioxide (TiO2) nanoparticles into a p...
Multiferroic phase competitions in perovskite manganite thin films
Multiferroic phase competitions perovskite manganite thin films
2016/12/2
Based on the Mochizuki- Furukawa model, the cycloid al spin structures of orthorh ombic RMnO3 manganite thin films on various magnetic substrates are simulated using Monte Carlo method. It is revealed...