Alloy disorder and fluctuating magnetic moments in the Earth's core

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00521048" target="_blank" >RIV/68378271:_____/19:00521048 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/19:10398948

Výsledek na webu

<a href="https://doi.org/10.1016/j.jmmm.2018.11.112" target="_blank" >https://doi.org/10.1016/j.jmmm.2018.11.112</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2018.11.112" target="_blank" >10.1016/j.jmmm.2018.11.112</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Alloy disorder and fluctuating magnetic moments in the Earth's core

Popis výsledku v původním jazyce

The electronic and thermal transport properties of the Earth’s core are crucial for many geophysical models. We show by first-principles modeling and methods of statistical physics that the spin disorder, not considered in previous studies, gives an essential contribution to the electrical resistivity at the Earth’s core conditions. The origin of this spin-disorder resistivity (SDR) consists in the existence of fluctuating local moments that are stabilized at high temperatures by the magnetic entropy even at pressures at which the ground state of iron is non-magnetic. It turns out that the contributions of various scattering mechanisms (alloy disorder, phonon scattering, spin disorder, and electron-electron correlations) are comparable, but not additive. Here we report results for iron and iron-rich alloys (Fe-O, Fe-Si, Fe-S) that can be present in the Earth’s core. Special attention is paid to alloys with two magnetic elements (Fe-Ni).

Název v anglickém jazyce

Alloy disorder and fluctuating magnetic moments in the Earth's core

Popis výsledku anglicky

The electronic and thermal transport properties of the Earth’s core are crucial for many geophysical models. We show by first-principles modeling and methods of statistical physics that the spin disorder, not considered in previous studies, gives an essential contribution to the electrical resistivity at the Earth’s core conditions. The origin of this spin-disorder resistivity (SDR) consists in the existence of fluctuating local moments that are stabilized at high temperatures by the magnetic entropy even at pressures at which the ground state of iron is non-magnetic. It turns out that the contributions of various scattering mechanisms (alloy disorder, phonon scattering, spin disorder, and electron-electron correlations) are comparable, but not additive. Here we report results for iron and iron-rich alloys (Fe-O, Fe-Si, Fe-S) that can be present in the Earth’s core. Special attention is paid to alloys with two magnetic elements (Fe-Ni).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA18-07172S" target="_blank" >GA18-07172S: Aktuální problémy teorie manipulace spinové polarizace v objemových a vrstevnatých systémech</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Magnetism and Magnetic Materials

ISSN

0304-8853

e-ISSN

—

Svazek periodika

475

Číslo periodika v rámci svazku

Apr

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

767-771

Kód UT WoS článku

000458152000109

EID výsledku v databázi Scopus

2-s2.0-85059541849