Effect of magnetic ordering on the stability of Ni–Mn–Ga(–Co–Cu) alloys along the tetragonal deformation path

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00481170" target="_blank" >RIV/68378271:_____/17:00481170 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/17:10370898 RIV/00216305:26210/17:PU125151

Výsledek na webu

<a href="http://dx.doi.org/10.1109/TMAG.2017.2707527" target="_blank" >http://dx.doi.org/10.1109/TMAG.2017.2707527</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/TMAG.2017.2707527" target="_blank" >10.1109/TMAG.2017.2707527</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of magnetic ordering on the stability of Ni–Mn–Ga(–Co–Cu) alloys along the tetragonal deformation path

Popis výsledku v původním jazyce

The influence of magnetic ordering on the stability of Ni–Mn–Ga(–Co–Cu) Heusler alloys is investigated using the first-principles exact muffin-tin orbital method in combination with the coherent-potential approximation. The paramagnetic (PM) state is described by disordered local moment approach. In stoichiometric Ni2MnGa alloy, the total energy profile along the tetragonal deformation path differs between ferromagnetic (FM) ground state and PM state with high energy, where cubic structure of austenite exhibits lower total energy than tetragonally distorted structure of martensite. Martensitic structure is stabilized in ground state by FM interaction. In PM state it can be stabilized by partial substitution of Ni by Co or by partial substitution of Mn/Ga by Cu. Energy difference between PM and FM state EPM-FM can be used for qualitative estimation of Curie temperature TC.n

Název v anglickém jazyce

Effect of magnetic ordering on the stability of Ni–Mn–Ga(–Co–Cu) alloys along the tetragonal deformation path

Popis výsledku anglicky

The influence of magnetic ordering on the stability of Ni–Mn–Ga(–Co–Cu) Heusler alloys is investigated using the first-principles exact muffin-tin orbital method in combination with the coherent-potential approximation. The paramagnetic (PM) state is described by disordered local moment approach. In stoichiometric Ni2MnGa alloy, the total energy profile along the tetragonal deformation path differs between ferromagnetic (FM) ground state and PM state with high energy, where cubic structure of austenite exhibits lower total energy than tetragonally distorted structure of martensite. Martensitic structure is stabilized in ground state by FM interaction. In PM state it can be stabilized by partial substitution of Ni by Co or by partial substitution of Mn/Ga by Cu. Energy difference between PM and FM state EPM-FM can be used for qualitative estimation of Curie temperature TC.n

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

IEEE Transactions on Magnetics

ISSN

0018-9464

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

000413981300024

EID výsledku v databázi Scopus

2-s2.0-85032920625