Modern zethrene chemistry

2017 ◽  
Vol 95 (3) ◽  
pp. 223-233 ◽  
Author(s):  
Pan Hu ◽  
Jishan Wu
Keyword(s):  
Magnetic Properties ◽  
Physical Properties ◽  
Physical Property ◽  
Open Shell ◽  
Synthetic Methods ◽  
Fundamental Structure ◽  
Electronic And Magnetic Properties ◽  
The Past ◽  
Diradical Character ◽  
Tailored Design

This paper gives a brief summary of zethrene chemistry after the pioneering works by Clar, Mitchell, Sondheimer, and Staab et al. In the past a few years, various synthetic methods and stabilizing strategies have been developed, which have made the synthesis of stable, vertically and laterally extended zethrenes practically achievable. One of the most important discoveries for this type of molecule is their open-shell diradical character, which is the origin of their unique optical, electronic, and magnetic properties. The fundamental structure–diradical character–physical property relationships were investigated, and these studies form the basis for the tailored design of more general open-shell singlet diradicaloids with controllable diradical character and physical properties.

scholarly journals Electronic and Magnetic Properties of a Three-Arm Nonconjugated Open-Shell Macromolecule

2021 ◽  
Author(s):  
Hyunki Yeo ◽  
Siddhartha Akkiraju ◽  
Ying Tan ◽  
Hamas Tahir ◽  
Neil R. Dilley ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Open Shell ◽  
Electronic And Magnetic Properties

scholarly journals Tuning the electronic and magnetic properties of antimonene nanosheets via point defects and external fields: first-principles calculations

2019 ◽  
Vol 21 (20) ◽  
pp. 10552-10566 ◽  
Author(s):  
Asadollah Bafekry ◽  
Mitra Ghergherehchi ◽  
Saber Farjami Shayesteh
Keyword(s):  
Magnetic Properties ◽  
Physical Properties ◽  
Point Defects ◽  
First Principles ◽  
External Fields ◽  
First Principles Calculations ◽  
Electronic And Magnetic Properties ◽  
Fundamental Physical

Defects are inevitably present in materials, and their existence in a material strongly affects its fundamental physical properties.

Design of 2D materials – MSi2CxN4-x (M = Cr, Mo, and W; x = 1 and 2) - with tunable electronic and magnetic properties

Nanoscale ◽  
2021 ◽  
Author(s):  
Bowen Li ◽  
Jiazhong Geng ◽  
Haoqiang Ai ◽  
youchao Kong ◽  
Haoyun Bai ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
2D Materials ◽  
Chemical Properties ◽  
First Principle ◽  
Physical And Chemical Properties ◽  
Two Dimensional ◽  
Electronic And Magnetic Properties ◽  
The Past ◽  
Physical And Chemical ◽  
And Chemical Properties

Two-dimensional (2D) materials have attracted increasing interest in the past decades due to their unique physical and chemical properties for diverse applications. In this work, we present a first-principle design...

Electronic Structure Calculations of Ti doped CeFe2

1990 ◽  
Vol 206 ◽  
Author(s):  
P. K. Khowash
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Electronic Structure Calculations ◽  
Experimental Investigations ◽  
Electronic And Magnetic Properties ◽  
The Past ◽  
Structure Calculations

ABSTRACTOver the past years, theoretical and experimental investigations have shown that Ce plays an important role in determining the electronic and magnetic properties in CeFe2- Recent experiments indicate that Ce carries a small moment in contrast to the earlier notion of its being non-magnetic. It is also been found that various additives to the intermetallic CeFe2 alloy behave differently when substituted at the Fe site. The magnetization in some cases remains nearly the same whereas in other cases drops off drastically. We report here the effect of Ti impurity substituted at the Fe site in CeFe2.

Correlation Between Nanoscale Structural, Electronic, and Magnetic Properties of Thin Films by Scanning-Probe Microscopy and Spectroscopy

MRS Bulletin ◽  
1997 ◽  
Vol 22 (8) ◽  
pp. 31-35 ◽  
Author(s):  
R. Wiesendanger
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Physical Properties ◽  
Magnetic Structure ◽  
Spatial Resolution ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Scanning Probe ◽  
Scanning Tunneling ◽  
Electronic And Magnetic Properties

Heteroepitaxial pseudomorphic thin-film growth allows the stabilization of solids in structures—that is, with crystalline symmetries and lattice constants that are far from those of the corresponding bulk material. This facilitates the tailoring of materials properties that do not exist in nature. Usually a strong correlation is found between the atomic, electronic, and magnetic structure of thin films, which leads to a drastic dependence of their physical properties on the details of growth conditions such as substrate temperature, evaporation rate, and background pressure. To learn more about the fundamental relationship between structural, electronic, and magnetic properties of thin films as well as to improve the reproducibility of their physical properties in view of technical applications, it is mandatory to apply experimental techniques with sufficient, ultimately atomic spatial resolution combined with high sensitivity. The class of scanning-probe microscopies and spectroscopies is ideally suited for that purpose as schematically illustrated in Figure 1. Scanning tunneling spectroscopy (STS) establishes the correlation between atomic structure and local electronic properties, while spin-polarized scanning tunneling spectroscopy (SPSTS) relates local electronic and magnetic properties. Additionally the correlationbetween topographical and magnetic structure can be addressed by magnetic force microscopy (MFM) though the spatial resolution is limited to about 10–50 nm. Since magnetic thin films are usually sensitive to oxidation, their preparation and characterization have to be performed in situ under ultrahigh vacuum (UHV) conditions in order to achieve reproducible experimental conditions. While STS is now routinely applied in UHV, it has only been recently that the first MFM studies under UHV conditions have been reported. In the following, representative examples of the application of STS, SPSTS, and MFM in ultrathin Fe, Gd, and Co films will be presented.

Zethrene and expanded zethrenes with tunable ground states and physical properties

2014 ◽  
Vol 86 (4) ◽  
pp. 529-537 ◽  
Author(s):  
Zhe Sun ◽  
Jishan Wu
Keyword(s):  
Magnetic Properties ◽  
Nonlinear Optics ◽  
Characteristic Feature ◽  
Physical Properties ◽  
Ground State ◽  
Materials Science ◽  
Closed Shell ◽  
Open Shell ◽  
Electronic Configuration ◽  
Resonance Structures

Abstract Zethrene and its related molecules have attracted much attention from the perspectives of both synthetic chemistry and materials science. One characteristic feature of these molecules is the existence of two distinct resonance structures, a closed-shell quinoidal form and an open-shell biradical form, which will lead to a significant biradical contribution to the ground-state electronic configuration. As a result, zethrene-based molecules exhibit unique optical, electronic, and magnetic properties, which open the door for a diversity of applications in the field of electronics, nonlinear optics, and spintronics.

Effects of Se substitution and transition metal doping on the electronic and magnetic properties of a MoSxSe2−x/h-BN heterostructure

2019 ◽  
Vol 21 (36) ◽  
pp. 20073-20082 ◽  
Author(s):  
Fei-Fei Yu ◽  
Sha-Sha Ke ◽  
Shan-Shan Guan ◽  
Hong-Xiang Deng ◽  
Yong Guo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Physical Properties ◽  
Van Der Waals ◽  
Transition Metal Doping ◽  
Metal Doping ◽  
Van Der Waals Heterostructures ◽  
Electronic And Magnetic Properties ◽  
Se Substitution

The van der Waals heterostructures created by stacking two monolayer semiconductors have been rapidly developed experimentally and exhibit various unique physical properties.

Magnetism and perfect spin filtering in pristine MgCl2 nanoribbons modulated by edge modification

2022 ◽  
Author(s):  
Railson Vasconcelos ◽  
Edson Nunes Costa Paura ◽  
Luiz Guilherme Machado de Macedo ◽  
Ricardo Gargano
Keyword(s):  
Magnetic Properties ◽  
New Materials ◽  
Electronic And Magnetic Properties ◽  
The Past ◽  
Edge Modification ◽  
Potential Applications ◽  
Spin Filtering ◽  
The Way

The search for new materials, with ideal electronic and magnetic properties for potential applications in nanoelectronics, has been extremely successful in the past years, and has paved the way for...

Unexpected diradical character and large magnetic spin coupling in modified porphyrins induced by inverting pyrrole rings

2019 ◽  
Vol 21 (31) ◽  
pp. 17209-17220 ◽  
Author(s):  
Qi Wang ◽  
Meiyu Song ◽  
Xinyu Song ◽  
Yuxiang Bu
Keyword(s):  
Magnetic Properties ◽  
Electronic Devices ◽  
Spin Coupling ◽  
Electronic And Magnetic Properties ◽  
Porphyrin Derivatives ◽  
Diradical Character ◽  
Magnetic Spin ◽  
Application Prospects

Porphyrin derivatives with inverted pyrrole rings could exhibit unique diradical character, and their relevant electronic and magnetic properties have great application prospects in terms of electronic devices.

ARMCO DI-MAX NONORIENTED ELECTRICAL STEELS

Alloy Digest ◽  
1999 ◽  
Vol 48 (1) ◽  
Keyword(s):  
Magnetic Properties ◽  
Physical Properties ◽  
Tensile Properties ◽  
Core Loss ◽  
Electrical Steels

Abstract Armco DI-MAX nonoriented electrical steels have practically identical magnetic properties in any direction of magnetism in the plane of the material. They have superior permeability at high inductions, low average core loss, good gage uniformity, excellent flatness, and a high stacking factor. This datasheet provides information on composition, physical properties, hardness, and tensile properties. Filing Code: FE-88. Producer or source: Armco Inc., Specialty Steels Division. Originally published April 1989, revised January 1999.

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