scholarly journals First principles calculation for Gilbert damping constants in ferromagnetic/non-magnetic junctions

AIP Advances ◽  
2018 ◽  
Vol 8 (5) ◽  
pp. 056016 ◽  
Author(s):  
R. Hiramatsu ◽  
D. Miura ◽  
A. Sakuma
Keyword(s):  
First Principles ◽  
First Principles Calculation ◽  
Gilbert Damping

First-principles calculations for Gilbert damping constant at finite temperature

2021 ◽  
Author(s):  
Ryoya Hiramatsu ◽  
Daisuke Miura ◽  
Akimasa SAKUMA
Keyword(s):  
First Principles ◽  
Finite Temperature ◽  
Spin Fluctuation ◽  
Tight Binding ◽  
First Principles Calculation ◽  
Transverse Spin ◽  
Orbital Method ◽  
Correlation Model ◽  
Gilbert Damping ◽  
Experimental Values

Abstract We propose a first-principles calculation method for the Gilbert damping constants α at finite temperatures. α is described by the torque correlation model in which the electronic structure is computed by the tight-binding linear muffin-tin orbital method. We include the finite-temperature effect as the transverse spin fluctuation in the disordered local moment picture within the coherent potential approximation. Applying the present method to bcc-Fe and L10-FePt, we demonstrate these temperature-dependent α. By comparing our calculated results with experimental results, we find the calculated values are less than half of the experimental values, reflecting the characteristics of the torque correlation model.

FIRST PRINCIPLES CALCULATION OF THE PHONON SPECTRA OF SOLIDS

1981 ◽  
Vol 42 (C6) ◽  
pp. C6-625-C6-627 ◽  
Author(s):  
P. E. Van Camp ◽  
V. E. Van Doren ◽  
J. T. Devreese
Keyword(s):  
First Principles ◽  
First Principles Calculation ◽  
Phonon Spectra

scholarly journals First-principles calculation of electronic, vibrational, and thermodynamic properties of triaminoguanidinium nitrate

2021 ◽  
Vol 27 (6) ◽  
Author(s):  
Wen-Guang Li ◽  
Yun-Dan Gan ◽  
Zhi-Xin Bai ◽  
Ming-Jian Zhang ◽  
Fu-Sheng Liu ◽  
...  
Keyword(s):  
Thermodynamic Properties ◽  
First Principles ◽  
First Principles Calculation
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