Intrinsic multiferroicity in two-dimensional VOCl2 monolayers

Nanoscale ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 1103-1110 ◽  
Author(s):  
Haoqiang Ai ◽  
Xiaohan Song ◽  
Siyun Qi ◽  
Weifeng Li ◽  
Mingwen Zhao
Keyword(s):  
Data Storage ◽  
Bulk Material ◽  
High Density ◽  
Two Dimensional

The coexistence of ferroelectricity and magnetism in VOCl2 monolayer which is mechanically strippable from the bulk material offers a tantalizing potential for high-density multistate data storage.

scholarly journals Effective Generalized Partial Response Target and Serial Detector for Two-Dimensional Bit-Patterned Media Recording Channel Including Track Mis-Registration

2020 ◽  
Vol 10 (17) ◽  
pp. 5738 ◽  
Author(s):  
Thien An Nguyen ◽  
Jaejin Lee
Keyword(s):  
Partial Response ◽  
Data Storage ◽  
High Density ◽  
Cloud Services ◽  
Two Dimensional ◽  
Magnetic Islands ◽  
Bit Patterned Media ◽  
Increasing Demand ◽  
Cross Track ◽  
Response Target

With the development of 5G technology, programs are gradually moving to cloud services. This leads to an increasing demand for storage. In the field of high-density data storage, bit-pattern media recording (BPMR) is considered a promising approach, as it can expand the data density to 4 Tb/in2. However, in high-density BPMR, bits or magnetic islands are very close to each other, leading to significant intertrack interference (ITI) from the cross-track direction and intersymbol interference (ISI) from the down-track direction. To minimize two-dimensional interference, including ITI and ISI, the serial detector method has been highly effective. However, in this method, the signal at the output of the first decoder is still a hard output. Therefore, we suggest methods to convert the output of the first detector into a soft output. Additionally, we have developed a new form of generalized partial response target to overcome the track mis-registration. The results show that our proposed methods apparently improve bit error rate performance.

Unconventional Distortion Induced Two-dimensional Multiferroicity in CrO3 Monolayer

Nanoscale ◽  
2021 ◽  
Author(s):  
Shanbao Chen ◽  
Huasheng Sun ◽  
Junfei Ding ◽  
Fang Wu ◽  
Chengxi Huang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Spin Polarization ◽  
Data Storage ◽  
High Thermal Stability ◽  
High Density ◽  
Two Dimensional ◽  
Multiferroic Materials

Two-dimensional (2D) multiferroic materials with the coexistence of electric and spin polarization offer a tantalizing potential for high-density multistate data storage. However, intrinsic 2D multiferroic semiconductors with high thermal stability...

scholarly journals A methodology for hygrothermal modelling of imperfect masonry interfaces

2021 ◽  
pp. 174425912198938
Author(s):  
Michael Gutland ◽  
Scott Bucking ◽  
Mario Santana Quintero
Keyword(s):  
Boundary Conditions ◽  
Material Properties ◽  
Structural Integrity ◽  
Bulk Material ◽  
Weather Conditions ◽  
Masonry Wall ◽  
Two Dimensional ◽  
Liquid Transport ◽  
Imperfect Contact ◽  
Moisture Contents

Hygrothermal models are important tools for assessing the risk of moisture-related decay mechanisms which can compromise structural integrity, loss of architectural features and material. There are several sources of uncertainty when modelling masonry, related to material properties, boundary conditions, quality of construction and two-dimensional interactions between mortar and unit. This paper examines the uncertainty at the mortar-unit interface with imperfections such as hairline cracks or imperfect contact conditions. These imperfections will alter the rate of liquid transport into and out of the wall and impede the liquid transport between mortar and masonry unit. This means that the effective liquid transport of the wall system will be different then if only properties of the bulk material were modelled. A detailed methodology for modelling this interface as a fracture is presented including definition of material properties for the fracture. The modelling methodology considers the combined effect of both the interface resistance across the mortar-unit interface and increase liquid transport in parallel to the interface, and is generalisable to various combinations of materials, geometries and fracture apertures. Two-dimensional DELPHIN models of a clay brick/cement-mortar masonry wall were created to simulate this interaction. The models were exposed to different boundary conditions to simulate wetting, drying and natural cyclic weather conditions. The results of these simulations were compared to a baseline model where the fracture model was not included. The presence of fractures increased the rate of absorption in the wetting phase and an increased rate of desorption in the drying phase. Under cyclic conditions, the result was higher peak moisture contents after rain events compared to baseline and lower moisture contents after long periods of drying. This demonstrated that detailed modelling of imperfections at the mortar-unit interface can have a definitive influence on results and conclusions from hygrothermal simulations.

Random modulation in high-density holographic data storage and correlation recognition system

2003 ◽  
Author(s):  
Guofan Jin ◽  
Liangcai Cao ◽  
Qingsheng He ◽  
Haoyun Wei ◽  
Minxian Wu
Keyword(s):  
Data Storage ◽  
Recognition System ◽  
High Density ◽  
Holographic Data Storage ◽  
Random Modulation

scholarly journals Influence of dimensionality on phase transition in VO2 nanocrystals

2013 ◽  
Vol 45 (3) ◽  
pp. 305-311 ◽  
Author(s):  
V.A. Blagojevic ◽  
N. Obradovic ◽  
N. Cvjeticanin ◽  
D.M. Minic
Keyword(s):  
Phase Transition ◽  
Activation Energy ◽  
Transition Temperature ◽  
Apparent Activation Energy ◽  
Phase Transition Temperature ◽  
Bulk Material ◽  
Two Dimensional ◽  
Lower Phase ◽  
One Dimensional ◽  
Simultaneous Movement

Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65?C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials.

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