Acetylene Coupler Builds Strong and Tunable Diradical Organic Molecular Magnets

2021 ◽  
Author(s):  
Jiapeng Ma ◽  
Yuan Yuan ◽  
Baotao Kang ◽  
Jin Yong Lee
Keyword(s):  
Molecular Magnets ◽  
Low Energy ◽  
Spintronic Devices ◽  
Magnetic Molecules

Sufficiently strong molecular magnets are used in small modern electronic and spintronic devices. Diradical organic magnetic molecules (OMMs) are promising options due to their lightness, flexibility, and low energy required...

Enchaining EDTA-chelated lanthanide molecular magnets into ordered 1D networks

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72510-72518 ◽  
Author(s):  
Rebecca J. Holmberg ◽  
Ilia Korobkov ◽  
Muralee Murugesu
Keyword(s):  
Molecular Magnets ◽  
One Dimension ◽  
Molecular Systems ◽  
Magnetic Molecules ◽  
Ordered Arrays ◽  
Unique Method

Extending molecular systems into chain networks is a unique method with which to orient magnetic molecules into well-ordered arrays along one dimension, and study their resulting properties.

SPINTRONIC DEVICES AND CIRCUITS FOR LOW-VOLTAGE LOGIC

2012 ◽  
Vol 21 (01) ◽  
pp. 1250005 ◽  
Author(s):  
DANIEL H. MORRIS ◽  
DAVID M. BROMBERG ◽  
JIAN-GANG (JIMMY) ZHU ◽  
LARRY PILEGGI
Keyword(s):  
Low Voltage ◽  
Logic Gates ◽  
Logic Circuits ◽  
Low Energy ◽  
Digital Logic ◽  
Spintronic Devices ◽  
Magnetic Devices ◽  
Logic Level

This paper describes the design of digital logic circuits composed exclusively from magnetic devices. The logic level of a signal is embedded in the direction of steered currents, not voltages. The currents are steered by small (e.g., 2-3x) resistance changes. Sub-100 mV pulsed voltages power and synchronize the circuits. Logic gates are non-volatile, allowing for fully-pipelined logic that can achieve ultra-low energy for design examples.

scholarly journals Intra-molecular origin of the spin-phonon coupling in slow-relaxing molecular magnets

2017 ◽  
Vol 8 (9) ◽  
pp. 6051-6059 ◽  
Author(s):  
Alessandro Lunghi ◽  
Federico Totti ◽  
Stefano Sanvito ◽  
Roberta Sessoli
Keyword(s):  
Molecular Magnets ◽  
Molecular Vibrations ◽  
Phonon Coupling ◽  
Magnetic Molecules ◽  
Molecular Origin

The design of slow relaxing magnetic molecules requires the optimization of internal molecular vibrations to reduce spin-phonon coupling.

scholarly journals Recent Advances in Two-Dimensional Spintronics

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Guojing Hu ◽  
Bin Xiang
Keyword(s):  
High Speed ◽  
2D Materials ◽  
Electronic Devices ◽  
Physical Characteristics ◽  
Low Energy ◽  
Two Dimensional ◽  
Spintronic Devices ◽  
Promising Technology ◽  
Great Progress ◽  
Experimental Researches

AbstractSpintronics is the most promising technology to develop alternative multi-functional, high-speed, low-energy electronic devices. Due to their unusual physical characteristics, emerging two-dimensional (2D) materials provide a new platform for exploring novel spintronic devices. Recently, 2D spintronics has made great progress in both theoretical and experimental researches. Here, the progress of 2D spintronics has been reviewed. In the last, the current challenges and future opportunities have been pointed out in this field.

Magnetic Quality in a Boscovichian Assemblage of Molecular Magnets

1906 ◽  
Vol 25 (2) ◽  
pp. 1025-1059 ◽  
Author(s):  
W. Peddie
Keyword(s):  
Molecular Magnets ◽  
Molecular Magnetism ◽  
Magnetic Molecules ◽  
Directional Control ◽  
Firm Basis ◽  
Material Bodies ◽  
Mutual Action ◽  
Great Development ◽  
Magnetic Phenomena

1. The gradual growth of the theory of molecular magnetism from the original suggestions of Poisson and Weber is well known. The recent great development, made by Ewing, and tested experimentally by means of models, has placed the theory on a fairly firm basis, and has made essentially secure the fundamental postulate that magnetic phenomena in material bodies are due to magnetic molecules which may possibly be regarded as free from any directional control other than that supplied by their own mutual action.

Dissociated Σ=27 boundaries in silicon

1988 ◽  
Vol 46 ◽  
pp. 624-625
Author(s):  
A. Garg ◽  
W.A.T. Clark ◽  
J.P. Hirth
Keyword(s):  
Electron Diffraction ◽  
Local Minimum ◽  
Boundary Energy ◽  
Coincidence Site Lattice ◽  
Boundary Plane ◽  
Low Energy ◽  
Theoretical Understanding ◽  
Site Lattice ◽  
Kikuchi Pattern ◽  
Analysis Techniques

In the last twenty years, a significant amount of work has been done in the theoretical understanding of grain boundaries. The various proposed grain boundary models suggest the existence of coincidence site lattice (CSL) boundaries at specific misorientations where a periodic structure representing a local minimum of energy exists between the two crystals. In general, the boundary energy depends not only upon the density of CSL sites but also upon the boundary plane, so that different facets of the same boundary have different energy. Here we describe TEM observations of the dissociation of a Σ=27 boundary in silicon in order to reduce its surface energy and attain a low energy configuration.The boundary was identified as near CSL Σ=27 {255} having a misorientation of (38.7±0.2)°/[011] by standard Kikuchi pattern, electron diffraction and trace analysis techniques. Although the boundary appeared planar, in the TEM it was found to be dissociated in some regions into a Σ=3 {111} and a Σ=9 {122} boundary, as shown in Fig. 1.

Transfer optics for high spatial resolution electron spectroscopy

1988 ◽  
Vol 46 ◽  
pp. 666-667
Author(s):  
G. G. Hembree ◽  
Luo Chuan Hong ◽  
P.A. Bennett ◽  
J.A. Venables
Keyword(s):  
Magnetic Field ◽  
Scanning Transmission Electron Microscope ◽  
Low Energy ◽  
Objective Lens ◽  
State University ◽  
Arizona State University ◽  
Initial Field ◽  
Resolution Electron ◽  
Scanning Transmission ◽  
Low Energy Electrons

A new field emission scanning transmission electron microscope has been constructed for the NSF HREM facility at Arizona State University. The microscope is to be used for studies of surfaces, and incorporates several surface-related features, including provision for analysis of secondary and Auger electrons; these electrons are collected through the objective lens from either side of the sample, using the parallelizing action of the magnetic field. This collimates all the low energy electrons, which spiral in the high magnetic field. Given an initial field Bi∼1T, and a final (parallelizing) field Bf∼0.01T, all electrons emerge into a cone of semi-angle θf≤6°. The main practical problem in the way of using this well collimated beam of low energy (0-2keV) electrons is that it is travelling along the path of the (100keV) probing electron beam. To collect and analyze them, they must be deflected off the beam path with minimal effect on the probe position.

Performance Evaluation of a Novel Type of Low-Energy Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 354-355
Author(s):  
Bertholdand Senftinger ◽  
Helmut Liebl
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Field Strength ◽  
Numerical Aperture ◽  
Low Energy ◽  
Energy Electron ◽  
High Resolution Imaging ◽  
Lens System ◽  
Resolution Imaging ◽  
Low Energy Electron

During the last few years the investigation of clean and adsorbate-covered solid surfaces as well as thin-film growth and molecular dynamics have given rise to a constant demand for high-resolution imaging microscopy with reflected and diffracted low energy electrons as well as photo-electrons. A recent successful implementation of a UHV low-energy electron microscope by Bauer and Telieps encouraged us to construct such a low energy electron microscope (LEEM) for high-resolution imaging incorporating several novel design features, which is described more detailed elsewhere.The constraint of high field strength at the surface required to keep the aberrations caused by the accelerating field small and high UV photon intensity to get an improved signal-to-noise ratio for photoemission led to the design of a tetrode emission lens system capable of also focusing the UV light at the surface through an integrated Schwarzschild-type objective. Fig. 1 shows an axial section of the emission lens in the LEEM with sample (28) and part of the sample holder (29). The integrated mirror objective (50a, 50b) is used for visual in situ microscopic observation of the sample as well as for UV illumination. The electron optical components and the sample with accelerating field followed by an einzel lens form a tetrode system. In order to keep the field strength high, the sample is separated from the first element of the einzel lens by only 1.6 mm. With a numerical aperture of 0.5 for the Schwarzschild objective the orifice in the first element of the einzel lens has to be about 3.0 mm in diameter. Considering the much smaller distance to the sample one can expect intense distortions of the accelerating field in front of the sample. Because the achievable lateral resolution depends mainly on the quality of the first imaging step, careful investigation of the aberrations caused by the emission lens system had to be done in order to avoid sacrificing high lateral resolution for larger numerical aperture.

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