Mechanism for the Direct Exchange Interaction of Europium in Compounds with Rocksalt Structure

1966 ◽  
Vol 37 (3) ◽  
pp. 1455-1457 ◽  
Author(s):  
J. Smit
Keyword(s):  
Exchange Interaction ◽  
Direct Exchange ◽  
Rocksalt Structure

scholarly journals Mixed-cation driven magnetic interaction of interstitial electrons for ferrimagnetic two-dimensional electride

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Seung Yong Lee ◽  
Joonho Bang ◽  
Hyun Yong Song ◽  
Byung Il Yoo ◽  
Yeongkwan Kim ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Degrees Of Freedom ◽  
Interlayer Space ◽  
Magnetic Interaction ◽  
Spin States ◽  
Two Dimensional ◽  
Direct Exchange ◽  
Mixed Cation ◽  
Layered Crystals ◽  
Condensed Matters

AbstractMagnetism of pure electrons is fundamental for understanding diverse magnetic phenomena in condensed matters but has not been fully investigated in experiments due to the lack of a tractable model system. Such an exotic material necessitates an exclusive magnetic interaction of electrons being devoid of orbital and lattice degrees of freedom. Here, we report the two-dimensional mixed-cation [YGdC]2+∙2e− electride, showing ferrimagnetic nature from the direct exchange interaction of magnetic interstitial electrons in interlayer space. We identify that magnetic interstitial electrons are periodically localized in octahedral and tetrahedral cavities between 2D cationic Y2−xGdx arrays. The mixed configuration of non-magnetic and magnetic cations in cavities induces divergent spin states and interactions of magnetic interstitial electrons, in which their direct exchange interaction overwhelms the interactions with magnetic cations, triggering the ferrimagnetic spin-alignment. This discovery facilitates further exploration of magnetic electrides and nurtures the study of two-dimensional magnetism of layered crystals and electron phases.

scholarly journals Примесная магнитная восприимчивость полупроводников в случае прямого обменного взаимодействия в модели Изинга

2019 ◽  
Vol 61 (11) ◽  
pp. 2036
Author(s):  
Н.А. Богословский ◽  
П.В. Петров ◽  
Н.С. Аверкиев
Keyword(s):  
Numerical Simulation ◽  
Magnetic Susceptibility ◽  
Ising Model ◽  
Exchange Interaction ◽  
Glass Phase ◽  
Magnetic Moments ◽  
Exponential Factor ◽  
Direct Exchange ◽  
Spin Glass Phase ◽  
Ferromagnetic Exchange

The dependence of the impurity magnetic susceptibility on temperature was studied by numerical simulation. The direct exchange interaction of magnetic moments of randomly distributed impurities was considered within the Ising model. The dependence of the magnetic susceptibility in such a system deviates from the Curie law at low temperature, which is associated with the formation of a spin glass phase. It is shown that the pre-exponential factor of the direct exchange interaction significantly influences on the temperature dependence of the magnetic susceptibility only in the case of ferromagnetic exchange.

scholarly journals Effect of the direct exchange interaction between magnetic impurities on magnetization in diluted magnetic semiconductors

2012 ◽  
Vol 22 (1) ◽  
pp. 53-58
Author(s):  
Vu Kim Thai ◽  
Le Duc Anh ◽  
Hoang Anh Tuan
Keyword(s):  
Exchange Interaction ◽  
Diluted Magnetic Semiconductors ◽  
Magnetic Semiconductors ◽  
Antiferromagnetic Coupling ◽  
Model Parameters ◽  
Magnetic Impurities ◽  
Coupling Constant ◽  
Direct Exchange ◽  
Wide Range ◽  
Diluted Magnetic

We consider a model of III-V diluted magnetic semiconductors where both of the exchange interaction between carrier and impurity spins, and the direct exchange interaction between magnetic impurities are taken into account. The magnetization as a function of temperature for a wide range of model parameters is calculated and discussed. We show that for a degenerate carrier system the suppression of the magnetization is sensitive to the antiferromagnetic coupling constant and the impurity concentration.

Sign in / Sign up

Export Citation Format

Share Document