Magnetic properties of DyFe5-xCoxAl7: Suppression of exchange interactions and magnetocrystalline anisotropy by Co substitution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10374651" target="_blank" >RIV/00216208:11320/18:10374651 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00501203

Výsledek na webu

<a href="https://doi.org/10.1016/j.jallcom.2018.01.126" target="_blank" >https://doi.org/10.1016/j.jallcom.2018.01.126</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2018.01.126" target="_blank" >10.1016/j.jallcom.2018.01.126</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic properties of DyFe5-xCoxAl7: Suppression of exchange interactions and magnetocrystalline anisotropy by Co substitution

Popis výsledku v původním jazyce

In 3d - 4f intermetallic compounds, a Co substitution for Fe usually strengthens the exchange interactions due to a shift of the Fermi energy to a region of the 3d band with higher density of states. Here, we study the influence of Co on the magnetism of ferrimagnetic DyFe5Al7 using magnetization measurements in static (up to 14 T) and pulsed (up to 58 T) magnetic fields. We find that the homogeneity range of DyFe5-xCoxAl7 is limited to x &lt;= 2.5. The Co substitution for Fe produces a strong detrimental effect on the 3d - 3d intrasublattice exchange interactions, which leads to a pronounced decrease of the Curie temperature and of the 3d - 4f intersublattice exchange field. A reduction of the density of states at the Fermi level might occur due to a broadening of the 3d band. A decrease of the rare-earth contribution to the magnetic anisotropy energy is also observed with increasing Co content. This is attributed to a competition between the Fe and Co contributions to the crystal electric field at the Dy site.

Název v anglickém jazyce

Magnetic properties of DyFe5-xCoxAl7: Suppression of exchange interactions and magnetocrystalline anisotropy by Co substitution

Popis výsledku anglicky

In 3d - 4f intermetallic compounds, a Co substitution for Fe usually strengthens the exchange interactions due to a shift of the Fermi energy to a region of the 3d band with higher density of states. Here, we study the influence of Co on the magnetism of ferrimagnetic DyFe5Al7 using magnetization measurements in static (up to 14 T) and pulsed (up to 58 T) magnetic fields. We find that the homogeneity range of DyFe5-xCoxAl7 is limited to x &lt;= 2.5. The Co substitution for Fe produces a strong detrimental effect on the 3d - 3d intrasublattice exchange interactions, which leads to a pronounced decrease of the Curie temperature and of the 3d - 4f intersublattice exchange field. A reduction of the density of states at the Fermi level might occur due to a broadening of the 3d band. A decrease of the rare-earth contribution to the magnetic anisotropy energy is also observed with increasing Co content. This is attributed to a competition between the Fe and Co contributions to the crystal electric field at the Dy site.

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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

741

Číslo periodika v rámci svazku

Duben

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

715-722

Kód UT WoS článku

000425530700089

EID výsledku v databázi Scopus

2-s2.0-85040704642