Superexchange Ferromagnetic Coupling and Thermodynamic Features of the La2FeCoO6 Semiconductor

2022 ◽  
Author(s):  
C. E. Deluque Toro ◽  
K. A. Muñoz Pulido ◽  
J. Arbey Rodríguez ◽  
D. A. Landínez Téllez ◽  
J. Roa-Rojas
Keyword(s):  
Ferromagnetic Coupling

Ferromagnetic Chain Based on Verdazyl-Nitroxide Diradical

2020 ◽  
Author(s):  
Evgeny Tretyakov ◽  
Svetlana Zhivetyeva ◽  
Pavel Petunin ◽  
Dmitry Gorbunov ◽  
Nina Gritsan ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Ferromagnetic Coupling ◽  
Nitronyl Nitroxide ◽  
Triplet Ground State ◽  
One Dimensional ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed ◽  
Ferromagnetic Chain ◽  
High Yields

<p>Verdazyl-nitroxide diradicals were synthesized using the palladium-catalyzed cross-coupling reaction of the corresponding iodoverdazyls with a nitronyl nitroxide-2-ide gold(I) complex with high yields (up to 82%). The synthesized diradicals were found to be highly thermally stable and have a singlet (D<i>E</i><sub>ST</sub> » -64 cm<sup>–1</sup>) or triplet ground state (D<i>E</i><sub>ST</sub> ³ 25 and 100 cm<sup>–1</sup>), depending on which canonical hydrocarbon diradical type they belong to. Upon crystallization, triplet diradicals form unique one-dimensional (1D) spin <i>S</i> = 1 chains of organic diradicals with intrachain ferromagnetic coupling of <i>J</i>′/<i>k</i><sub>B</sub> from 3 to 6 K.</p>

The localized electron: magnetic properties

2018 ◽  
Author(s):  
Jean-Pierre Launay ◽  
Michel Verdaguer
Keyword(s):  
Single Molecule ◽  
Model Systems ◽  
Ferromagnetic Coupling ◽  
Single Chain ◽  
Single Molecule Magnets ◽  
Magnetic Systems ◽  
Orbital Interactions ◽  
Prussian Blue Analogues ◽  
Mononuclear Complexes

After preliminaries about electron properties, and definitions in magnetism, one treats the magnetism of mononuclear complexes, in particular spin cross-over, showing the role of cooperativity and the sensitivity to external perturbations. Orbital interactions and exchange interaction are explained in binuclear model systems, using orbital overlap and orthogonality concepts to explain antiferromagnetic or ferromagnetic coupling. The phenomenologically useful Spin Hamiltonian is defined. The concepts are then applied to extended molecular magnetic systems, leading to molecular magnetic materials of various dimensionalities exhibiting bulk ferro- or ferrimagnetism. An illustration is provided by Prussian Blue analogues. Magnetic anisotropy is introduced. It is shown that in some cases, a slow relaxation of magnetization arises and gives rise to appealing single-ion magnets, single-molecule magnets or single-chain magnets, a route to store information at the molecular level.

A novel and facile route to in-situ formation of composites with dual coupling interactions for considerable millimeter-wave absorption performance

2021 ◽  
Author(s):  
Chuyang Liu ◽  
Tao Jiang ◽  
Tian Gao ◽  
Guangxian Xia ◽  
Yufan Cao ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Exchange Coupling ◽  
Ferromagnetic Coupling ◽  
Soft Magnetic ◽  
Magnetic Exchange ◽  
Magnetic Exchange Coupling ◽  
Absorption Performance ◽  
In Situ Formation ◽  
Facile Route

It is well known that both hard/soft magnetic exchange-coupling and ferroelectric-ferromagnetic coupling could facilitate the microwave absorption behavior. Herein, we propose the BaZrxFe12-xO19/Fe3O4/BaZrO3 composites to integrate the advantages of the...

Cover Picture: Trinuclear Copper Complexes with Triplesalen Ligands: Geometric and Electronic Effects on Ferromagnetic Coupling via the Spin-Polarization Mechanism (Chem. Eur. J. 33/2007)

2007 ◽  
Vol 13 (33) ◽  
pp. 9151-9151
Author(s):  
Thorsten Glaser ◽  
Maik Heidemeier ◽  
Julia B. H. Strautmann ◽  
Hartmut Bögge ◽  
Anja Stammler ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Copper Complexes ◽  
Ferromagnetic Coupling ◽  
Electronic Effects ◽  
Polarization Mechanism

Ferromagnetic coupling in a heptanuclear nickel cluster with a vertex-shared dicubane structure

2004 ◽  
Vol 28 (5) ◽  
pp. 558 ◽  
Author(s):  
Tony D. Keene ◽  
Michael B. Hursthouse ◽  
Daniel J. Price
Keyword(s):  
Ferromagnetic Coupling ◽  
Nickel Cluster

scholarly journals Ferromagnetic Coupling of Mononuclear Fe Centers in a Self-Assembled Metal-Organic Network on Au(111)

2012 ◽  
Vol 109 (26) ◽  
Author(s):  
T. R. Umbach ◽  
M. Bernien ◽  
C. F. Hermanns ◽  
A. Krüger ◽  
V. Sessi ◽  
...  
Keyword(s):  
Ferromagnetic Coupling ◽  
Metal Organic ◽  
Self Assembled

(Anti-)ferromagnetic coupling in Fe/Si multilayers from polarized neutron reflectometry

1997 ◽  
Vol 234-236 ◽  
pp. 498-499
Author(s):  
H. Fredrikze ◽  
A. van der Graaf ◽  
M. Valkier ◽  
J. Kohlhepp ◽  
F.J.A. den Broeder
Keyword(s):  
Neutron Reflectometry ◽  
Ferromagnetic Coupling ◽  
Polarized Neutron ◽  
Polarized Neutron Reflectometry

scholarly journals First-principles study of ferromagnetic coupling in Zn1−xCrxTe thin film

2005 ◽  
Vol 97 (4) ◽  
pp. 043904 ◽  
Author(s):  
Q. Wang ◽  
Q. Sun ◽  
P. Jena ◽  
Y. Kawazoe
Keyword(s):  
Thin Film ◽  
First Principles ◽  
Ferromagnetic Coupling ◽  
First Principles Study

Ferromagnetic coupling in Mg-doped passivated AlN nanowires: A first-principles study

2011 ◽  
Vol 249 (1) ◽  
pp. 185-189 ◽  
Author(s):  
Zhen-Kun Tang ◽  
Ling-Ling Wang ◽  
Li-Ming Tang ◽  
Xiao-Fei Li ◽  
Wen-Zhi Xiao ◽  
...  
Keyword(s):  
First Principles ◽  
Ferromagnetic Coupling ◽  
First Principles Study ◽  
Mg Doped
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