Strain modulated ferromagnetic phase transitions in monolayer FeCl2 through exchange competitions: the first-principle and Monte Carlo simulations

2020 ◽  
Vol 22 (30) ◽  
pp. 17291-17298
Author(s):  
Ya Yang ◽  
Peiyin Guo ◽  
Yongsong Luo
Keyword(s):  
Phase Transition ◽  
Monte Carlo ◽  
Phase Transitions ◽  
Monte Carlo Simulations ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Ferromagnetic Phase ◽  
First Principle

Strain drives the magnetic phase transition of 1T-FeCl2 through exchange competitions.

Electronic Properties and Magnetic Phase Transition in Half-Heusler Compound Fe1-XCuxMnSb

2012 ◽  
Vol 479-481 ◽  
pp. 403-406
Author(s):  
Bo Wu ◽  
Xiu De Yang ◽  
Song Zhang
Keyword(s):  
Phase Transition ◽  
Magnetic Phase Transition ◽  
Density Functional ◽  
Large Deviation ◽  
Magnetic Phase ◽  
Magnetic Coupling ◽  
Ferromagnetic State ◽  
Ferromagnetic Phase ◽  
Half Metallicity ◽  
Heusler Compound

By using the first-principles calculations within the density functional theory (DFT), we investigate the structure, antiferromagnetic-ferromagnetic phase transition and half-metallicity of half-Heusler compound Fe1-XCuxMnSb. For the ferromagnetic state, the calculated lattice constant follows the Vegard law, and total ferromagnetic moment agrees with Slater-Pauling rule as x<0.5 while suffers large deviation as x>0.5. As x=0.75, a novel magnetic phase transition occurs, which mainly derives from the competition between RKKY and superexchange magnetic coupling. Further analyses on density of states (DOS) reveal that the Fermi level can be adjusted by doped Cu concentration in ferromagnetic state, and d partial DOS of Mn atoms with different spin orientation compensate for each other that results in symmetric spin-up and spin-down band in antiferromagnetic state.

scholarly journals Влияние структурных неоднородностей и газообразующих примесей на функциональные свойства высокочистых редкоземельных металлов

2018 ◽  
Vol 60 (6) ◽  
pp. 1103
Author(s):  
В.Б. Чжан ◽  
И.С. Терёшина
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Magnetocaloric Effect ◽  
Magnetic Phase Transition ◽  
Structural State ◽  
Magnetic Order ◽  
Magnetic Phase ◽  
Grain Sizes ◽  
Phase Transition Temperatures ◽  
Curie Temperatures

AbstractRare-earth metals (REM) gadolinium and dysprosium, and also the Gd–H and Dy–H systems in which magnetic order–order and order–disorder phase transitions are accompanied by significant magnetocaloric effect, have been studied. The materials have been prepared in various structural states. It is stated that there is a substantial difference of their functional properties in the dependence on the features of the structural state and also on the existence of a gas-forming impurity. It has been proved experimentally and theoretically that the Curie temperatures of Gd samples with grain sizes of ~200 nm increases as a result of hydrogenation, while the magnetic phase transition temperatures of Dy are almost unchanged Inhomogeneities.

Monte Carlo Study of Magnetostructural Phase Transitions in Ni50Mn25+xSb25-x Heusler Alloys

2009 ◽  
Vol 154 ◽  
pp. 139-144 ◽  
Author(s):  
V.V. Sokolovskiy ◽  
Vasiliy D. Buchelnikov ◽  
Sergey Taskaev
Keyword(s):  
Monte Carlo ◽  
Phase Transitions ◽  
Monte Carlo Simulations ◽  
Magnetic Phase ◽  
Heusler Alloys ◽  
Monte Carlo Study ◽  
Magnetic Phase Transitions ◽  
Antiferromagnetic Exchange ◽  
Magnetization Curves ◽  
Model Hamiltonian

On the basis of Monte Carlo simulations, we investigate the temperature dependence of magnetization of Ni-Mn-Sb Heusler alloys, in which the part of the Mn atoms interact antiferromagnetically. It is shown that this antiferromagnetic exchange is responsible for existence of several magnetic phase transitions in the Heusler alloys. For a certain set of parameters of the model Hamiltonian we obtain coupled martensitic and magnetic phase transitions. Results of simulations agree in an excellent way with the experimental magnetization curves.

scholarly journals Driving the polar spin reorientation transition of ultrathin ferromagnets with antiferromagnetic–ferromagnetic phase transition of nearby FeRh alloy film

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
P. Dróżdż ◽  
M. Ślęzak ◽  
W. Janus ◽  
M. Szpytma ◽  
H. Nayyef ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Ferromagnetic Layer ◽  
Magnetic Coupling ◽  
Alloy Film ◽  
Spin Reorientation ◽  
Ferromagnetic Phase ◽  
Ferromagnetic Phase Transition ◽  
The Impact

Abstract We show that in-plane to out-of-plane magnetization switching of a ferromagnetic layer can be driven by antiferromagnetic–ferromagnetic phase transition in a nearby FeRh system. For FeRh/Au/FeAu trilayers, the impact of the magnetic phase transition of FeRh onto the perpendicular magnetization of monoatomic FeAu superlattices is transferred across the Au spacer layer via interlayer magnetic coupling. The polar spin reorientation process of the FeAu spins driven by the magnetic phase transition in the FeRh reveals its major features; namely it is reversible and displays hysteresis.

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