Periodic approach to the electronic structure and magnetic coupling in KCuF3, K2CuF4, and Sr2CuO2Cl2 low-dimensional magnetic systems

2004 ◽  
Vol 99 (5) ◽  
pp. 805-823 ◽  
Author(s):  
Ib�rio de Pinho Ribeiro Moreira ◽  
Roberto Dovesi
Keyword(s):  
Electronic Structure ◽  
Magnetic Coupling ◽  
Magnetic Systems ◽  
Low Dimensional

scholarly journals Spin-polarised Electron Studies of Low-dimensional Magnetic Systems

1999 ◽  
Vol 52 (3) ◽  
pp. 579 ◽  
Author(s):  
Markus Donath
Keyword(s):  
Magnetic Properties ◽  
Local Density ◽  
Magnetic Coupling ◽  
Magnetic Sensors ◽  
Magnetic Phase Transitions ◽  
Magnetic Systems ◽  
Combined Use ◽  
Component Systems ◽  
Low Dimensional ◽  
Coupling Phenomena

Spin-polarised electrons provide unique experimental access to magnetic properties of surfaces and layered structures. The combined use of different techniques allows us to develop a microscopic picture of the physics underlying the macroscopic magnetic properties, e.g. magnetic phase transitions, magnetic coupling phenomena, exceptional surface magnetic properties. In this paper, two techniques are described together with the kind of questions addressed by them. Spin-resolved appearance potential spectroscopy gives local magnetic information about multi-component systems by probing the spin-dependent local density of unoccupied states. Spin-resolved inverse photo-emission measures specific electron states above the Fermi level. In particular, two-dimensional states serve as magnetic sensors at surfaces. Examples from surfaces as well as thin-film structures of band and local-moment ferromagnets are presented.

Low-Dimensional Magnetic Systems in Nanopore Arrays

2013 ◽  
Vol 49 (8) ◽  
pp. 4610-4613 ◽  
Author(s):  
Noelia Bajales ◽  
Maria S. Viqueira ◽  
Lucia Avalle ◽  
Silvia E. Urreta ◽  
Paula G. Bercoff
Keyword(s):  
Magnetic Systems ◽  
Nanopore Arrays ◽  
Low Dimensional

Determination of the shear force of high-coercive permanent magnets from an alloy of neodymium—iron—boron rare-earth elements of 5 mm thickness

2020 ◽  
pp. 7-10
Author(s):  
A.Ya. Krasil'nikov ◽  
A.A. Krasilnikov ◽  
D.V. Taranov
Keyword(s):  
Rare Earth ◽  
Shear Force ◽  
Permanent Magnets ◽  
Magnetic System ◽  
Magnetic Coupling ◽  
Magnetic Systems ◽  
Neodymium Iron Boron ◽  
Magnetic Couplings ◽  
Standard Calculation

The possibility of applying the standard calculation of the shear force of thin high-coercive neodymium— iron—boron permanent magnets in magnetic systems and magnetic couplings is considered. A correction factor is proposed for calculating the shear force in systems with thin magnets, which allows at the stage of developing sealed equipment to calculate the shear force of permanent magnets in these systems. Keywords: magnetic system, magnetic coupling, permanent magnet, shear force. [email protected]

scholarly journals Enhanced Luminescence and Mechanistic Studies on Mn-doped Double Layered Perovskite Phosphors: Cs4Mn1−xCdxBi2Cl12

2020 ◽  
Author(s):  
Brenda Vargas ◽  
Diana T. Reyes-Castillo ◽  
Eduardo Coutino-Gonzalez ◽  
Citlali Sánchez-Aké ◽  
Carlos Ramos ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Layered Perovskite ◽  
Great Promise ◽  
New Family ◽  
Halide Perovskites ◽  
Optoelectronic Applications ◽  
The Stability ◽  
Low Dimensional ◽  
Stability Issues ◽  
Mn Doped

Halide perovskites offer great promise for optoelectronic applications, but stability issues continue to hinder its implementation and long-term stability. The stability of all-inorganic halide perovskites and the inherent quantum confinement of low dimensional perovskites can be harnessed to synthesize materials with high PL efficiency. An example of such materials is the recently reported new family of layered double perovskites, Cs4Mn1−xCdxBi2Cl12. Herein, we report a new synthetic procedure that enhances the maximum PLQY of this family materials to up 79.5%, a 20% enhancement from previous reports and the highest reported for a Mn-doped halide perovskite. Importantly, stability tests demonstrate that these materials are very stable towards humidity, UV irradiation, and temperature. Finally, we investigated the photophysics, the effects of magnetic coupling and temperature in the PL efficiency and proposed a mechanism for the emission process. Our results highlight the potential of this family of materials and related layered all-inorganic perovskites for solid-state lighting and optoelectronic applications<p></p>

LOW-DIMENSIONAL ELECTRONIC STATES AT METAL SURFACES: QUANTUM WELLS AND QUANTUM WIRES

1995 ◽  
Vol 02 (01) ◽  
pp. 81-88 ◽  
Author(s):  
F.J. HIMPSEL
Keyword(s):  
Quantum Wells ◽  
Giant Magnetoresistance ◽  
Quantum Wires ◽  
Magnetic Coupling ◽  
Magnetic Multilayers ◽  
Atomic Scale ◽  
Level Shifts ◽  
Stepped Surface ◽  
Low Dimensional ◽  
Step Edges

Several possibilities of “engineering” low-dimensional solids on the atomic scale are discussed. The electronic and magnetic structure of such materials is explored for two classes, i.e., multilayers and “wires” attached to step edges. Magnetic multilayers represent a particularly promising case, since quantum effects have macroscopic consequences. Quantization perpendicular to the layers is connected with oscillatory magnetic coupling, which in turn is important for obtaining “giant” magnetoresistance. This effect is being applied towards the fabrication of magnetoresistive reading heads for magnetically stored data. Extensions towards lateral superlattices and quantum wires are explored, where a stepped surface acts as a template. It is found that electrons can be trapped at step edges, and level shifts of the order 0.5 eV are observed for atoms adsorbed at step edges.

Hall effect and magnetoresistance in low dimensional magnetic systems

1987 ◽  
Vol 61 (8) ◽  
pp. 4382-4384 ◽  
Author(s):  
A. K. Ibrahim ◽  
R. Powers ◽  
G. O. Zimmerman ◽  
M. Tahar
Keyword(s):  
Hall Effect ◽  
Magnetic Systems ◽  
Low Dimensional

scholarly journals Spin-resolved electronic structure studies of non-magnetic systems: Possible observation of the Fano Effect in polycrystal Ce

2006 ◽  
Vol 378-380 ◽  
pp. 925-928 ◽  
Author(s):  
J.G. Tobin ◽  
S.A. Morton ◽  
B.W. Chung ◽  
S.W. Yu ◽  
G.D. Waddill
Keyword(s):  
Electronic Structure ◽  
Magnetic Systems ◽  
Fano Effect
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