Structure and Properties of Non-classical Polymers. XV. 1D Polymers Possessing Two Bands with Ferromagnetically Coupled Electrons

2010 ◽  
Vol 65 (1) ◽  
pp. 49-56
Author(s):  
Nikolai Tyutyulkov ◽  
Nedko Drebov ◽  
Klaus Müllen ◽  
Fritz Dietz

The energy spectra and magnetic properties of a new class of non-classical (non-Kekulé) 1D polymers, having two bands with magnetically coupled electrons, have been investigated by manyelectron band theory

1994 ◽  
Vol 189 (1) ◽  
pp. 83-97 ◽  
Author(s):  
N. Tyutyulkov ◽  
F. Dietz ◽  
K. Müllen ◽  
M. Baumgarten ◽  
S. Karabunarliev

2018 ◽  
Vol 56 (1A) ◽  
pp. 197
Author(s):  
Nguyen Hoang Tuan

In this study, we present some results on the structure and properties of the solid solution of Bi0.5K0.5TiO3– BiFeCoO3 (BKT – BFCO) by Sol-gel method. Crystal structures of BKT – BFCO solid solutions were studies by XRD and Raman spectroscopy. The results were in good agreement with the previous reports of Bi0.5K0.5TiO3– BiFeO3 (BKT – BFO) and Bi0.5K0.5TiO3 – BiCoO3 (BKT – BCO) solid solutions. The magnetic properties were investigated via unsaturated M-H loop, which showed the competition of paramagnetic and antiferromagnetic ordering in BKT – BFCO. However, differing from the BKT – BFO and BKT – BCO solid solutions, the unclear values of saturated magnetism in BKT – BFCO raised the unexplained question, which needed further studies.


2020 ◽  
Vol 8 (38) ◽  
pp. 13286-13296
Author(s):  
Mahsa Abdollahi ◽  
Meysam Bagheri Tagani

Motivated by the intrinsic ferromagnetic properties and high Curie temperature of V-based Janus dichalcogenide monolayers as a new class of 2D materials, we investigated the structural, electronic and magnetic properties of the Janus VSeS monolayer by first-principles calculations.


2007 ◽  
Vol 13 (35) ◽  
pp. 9948-9956 ◽  
Author(s):  
Rajendra Shakya ◽  
Sarmad Sahiel Hindo ◽  
Libo Wu ◽  
Suolong Ni ◽  
Marco Allard ◽  
...  

1994 ◽  
Vol 3 (4) ◽  
pp. 803-815 ◽  
Author(s):  
Galia Madjarova ◽  
Martin Baumgarten ◽  
Klaus Müllen ◽  
Nikolai Tyutyulkov

2017 ◽  
Vol 89 (4) ◽  
pp. 545-552
Author(s):  
Alena Michalcová ◽  
Ivo Marek ◽  
Adél Len ◽  
Oleg Heczko ◽  
Jan Drahokoupil ◽  
...  

Abstract Nanocrystalline nickel is an interesting material for catalysis, and also, like all nanocrystalline metals, it has potential for structural application. Our aim was to develop a method for preparation of precursor materials for powder metallurgy. Because of this, selective leaching of binary alloy was chosen as it leads to production of nanocrystalline clustered (sub)micro particles. In this work, the preparation of Ni particles by selective leaching of Al matrix from Al-50 wt.% Ni in NaOH water solution is described. It was found that structure and magnetic properties were strongly dependent on leaching temperature, which was proven by characterization of Ni particles leached at −20, 0, 20, 40, 60 and 80°C. The microstructure of as-prepared particles was observed by HRTEM and also by small angle neutron scattering. Magnetic properties were characterized by measuring of saturation magnetization. It was proven that with increased leaching temperature the grain size of prepared nanocrystalline particles increased. Also the value of saturated magnetization follows the same trend. The amount of hydrogen stored in nickel particles is independent on leaching temperature.


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