Open AccessTheoretical study of complex susceptibility of Pd and Pt
Author(s) -
Rico M. Sitorus,
Anugrah Azhar,
Adam B. Cahaya,
Ahmad R. T. Nugraha,
Muhammad Aziz Majidi
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1816/1/012044
Subject(s) - magnetic susceptibility , condensed matter physics , ferromagnetism , hubbard model , density functional theory , metal , atomic orbital , consistency (knowledge bases) , spin (aerodynamics) , chemistry , materials science , physics , computational chemistry , quantum mechanics , electron , thermodynamics , mathematics , organic chemistry , superconductivity , geometry
Spin transfer torque in a multilayer magnetic system can be understood in terms of interaction between a normal metal and a ferromagnetic layer on the multilayer, in which the interaction is characterized by the magnetic susceptibility. Most of experimental studies on this subject utilizes heavy metals, such as Pd and Pt, while a recent theory assumes a light metal as the normal metal. We aim to reconcile this discrepancy and achieve consistency with the experiments by studying magnetic susceptibility of Pd and Pt. We theoretically investigate the complex magnetic susceptibility of Pd and Pt by combining Tight-binding Approximation, Hubbard Model, and Density Functional Theory. We calculate a single band susceptibility for Pd and Pt. Our results show that the band structure is dominated by the d-orbitals and the susceptibility is enhanced by its large repulsive interaction.