Electronic structure and quantum spin fluctuations at the magnetic phase transition in MnSi

2018 ◽  
Vol 536 ◽  
pp. 408-412 ◽  
Author(s):  
A.A. Povzner ◽  
A.G. Volkov ◽  
T.A. Nogovitsyna
Keyword(s):  
Phase Transition ◽  
Electronic Structure ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Quantum Spin ◽  
Spin Fluctuations

Magnetic Phase Transition in MnSi Based on the First Principle Calculations of Electronic Structure and Spin Fluctuation Theory

2019 ◽  
Vol 289 ◽  
pp. 198-204
Author(s):  
Aleksandr Povzner ◽  
Tatyana A. Nogovitsyna ◽  
Arkadij G. Volkov ◽  
Tagir Nuretdinov
Keyword(s):  
Phase Transition ◽  
Electronic Structure ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Spin Fluctuation ◽  
Fluctuation Theory ◽  
Ministry Of Education ◽  
Spin Correlations ◽  
The Russian Federation ◽  
Good Agreement

Based on the spin-fluctuation theory and LSDA + U + SO-calculations of the electronic structure, the spin states arising in the region of the magnetic phase transition in the helicoidal ferromagnet MnSi are studied. Within the framework of the stated model of the electronic structure, a temperature dependence of the homogeneous magnetic susceptibility is obtained near the temperature of the magnetic phase transition, which is in good agreement with experiment. At the temperature of the transition to the paramagnetic state, the left chirality vanishes, and spin correlations arise with a radius equal to the length of the spin helix, which then decreases with temperature. The results were obtained within the framework of the assignment of the Ministry of Education and Science of the Russian Federation, contract 3.9521.2017 / 8.9

Electronic structure and magnetic phase transition in MnSi

2017 ◽  
Vol 59 (7) ◽  
pp. 1285-1290 ◽  
Author(s):  
A. A. Povzner ◽  
A. G. Volkov ◽  
T. A. Nogovitsyna
Keyword(s):  
Phase Transition ◽  
Electronic Structure ◽  
Magnetic Phase Transition ◽  
Magnetic Phase

scholarly journals Study of physical properties of a ferrimagnetic spinel Cu1.5Mn1.5O4: spin dynamics, magnetocaloric effect and critical behavior

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25664-25676
Author(s):  
Abir Hadded ◽  
Jalel Massoudi ◽  
Sirine Gharbi ◽  
Essebti Dhahri ◽  
A. Tozri ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Physical Properties ◽  
Magnetocaloric Effect ◽  
Phase Transition Temperature ◽  
Magnetic Phase Transition ◽  
Critical Behavior ◽  
Magnetic Phase ◽  
Spin Dynamics ◽  
Critical Behaviour

The present work reports a detailed study of the spin dynamics, magnetocaloric effect and critical behaviour near the magnetic phase transition temperature, of a ferrimagnetic spinel Cu1.5Mn1.5O4.

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