dynamical susceptibility
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2021 ◽  
Vol 21 (11) ◽  
pp. 5694-5697
Author(s):  
A. F. R. Rodriguez ◽  
R. F. Lacerda ◽  
L. E. Maggi ◽  
Hory Mohammadpour ◽  
Mohammad Niyaifar ◽  
...  

Magnetic nanocomposites based on maghemite nanoparticles supported (ex situ route) on styrene- divinilbenzene (Sty-DVB) copolymer templates were produced and characterized for their structure and morphology. The as-produced nanocomposites were further chemically-treated with different oxidant agents and surface-coated with stearic acid. X-ray diffraction and transmission electron microscopy data show that the incorporated nanoparticles are preserved despite the aggressive chemical treatments employed. From the dynamical susceptibility measurements performed on the nanocomposites, the values of the saturation magnetization (76 emu/g) and the effective magnetic anisotropy (1.7 × 104 J/m3) were obtained, in excellent agreement with the values reported in the literature for maghemite. This finding strongly supports the preservation of the magnetic properties of the supported nanosized maghemite throughout the entire samples’ processing.



2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Farshad Azizi ◽  
Hamed Rezania

AbstractIn this paper, we present a Kane-Mele model in the presence of magnetic field and next nearest neighbors hopping amplitudes for investigations of the spin susceptibilities of Germanene layer. Green’s function approach has been implemented to find the behavior of dynamical spin susceptibilities of Germanene layer within linear response theoryand in the presence of magnetic field and spin-orbit coupling at finite temperature. Our results show the magnetic excitation mode for both longitudinal and transverse components of spin tends to higher frequencies with spin-orbit coupling strength. Moreover the frequency positions of sharp peaks in longitudinal dynamical spin susceptibility are not affected by variation of magnetic field while the peaks in transverse dynamical susceptibility moves to lower frequencies with magnetic field. The effects of electron doping on frequency behaviors of spin susceptibilities have been addressed in details. Finally the temperature dependence of static spin structure factors due to the effects of spin-orbit coupling, magnetic field and chemical potential has been studied.



2021 ◽  
Author(s):  
Eduardo Saavedra ◽  
Sebastián Castillo-Sepúlveda ◽  
Rosa M. Corona ◽  
Dora Altbir ◽  
Juan Escrig ◽  
...  


2020 ◽  
Vol 25 (3) ◽  
pp. 23-32
Author(s):  
Vladimir V. Prudnikov ◽  
Pavel V. Prudnikov ◽  
Anastasiya S. Lyakh

Simulation of the non-equilibrium critical behavior of the three-dimensional anisotropic Heisenberg model is carried out with realization of Glauber dynamics and the dynamical susceptibility and the fluctuation-dissipation ratio are calculated with evolution of system from a high-temperature initial state.



2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Santanu Pakhira ◽  
Chandan Mazumdar ◽  
Abhik Basu ◽  
R. Ranganathan ◽  
R. N. Bhowmik ◽  
...  


2018 ◽  
Vol 98 (11) ◽  
Author(s):  
Vladimir A. Zyuzin ◽  
Prachi Sharma ◽  
Dmitrii L. Maslov


2018 ◽  
Vol 98 (4) ◽  
Author(s):  
Avraham Klein ◽  
Samuel Lederer ◽  
Debanjan Chowdhury ◽  
Erez Berg ◽  
Andrey Chubukov


2018 ◽  
Vol 59 (7) ◽  
pp. 1075-1080 ◽  
Author(s):  
Niem T. Nguyen ◽  
Thao H. Pham ◽  
Giang H. Bach ◽  
Cong T. Bach


2018 ◽  
Vol 97 (15) ◽  
Author(s):  
Avraham Klein ◽  
Samuel Lederer ◽  
Debanjan Chowdhury ◽  
Erez Berg ◽  
Andrey Chubukov


Soft Matter ◽  
2015 ◽  
Vol 11 (46) ◽  
pp. 9020-9025 ◽  
Author(s):  
Rémy Colin ◽  
Ahmed M. Alsayed ◽  
Cyprien Gay ◽  
Bérengère Abou

We investigate dynamic heterogeneities with both a four-point correlation function G4 and its associated dynamical susceptibility χ4, in dense suspensions of soft microgel particles.



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