Ferromagnetic CeSi1.2Ga0.8 alloy: Study on magnetocaloric and thermoelectric properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F22%3A10250355" target="_blank" >RIV/61989100:27740/22:10250355 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/22:10250355

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0304885321010441" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0304885321010441</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2021.168833" target="_blank" >10.1016/j.jmmm.2021.168833</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ferromagnetic CeSi1.2Ga0.8 alloy: Study on magnetocaloric and thermoelectric properties

Popis výsledku v původním jazyce

We present the magnetic, specific heat, electrical resistivity, and thermoelectric power measurements for the intermetallic compound CeSi1.2Ga0.8. This composition belongs to the series CeSi2-xGax, which exhibits diverse magnetic orderings and different crystallographic structures depending on the substitution level x. It has been previously suggested that for 0.0 &lt; x &lt; 1.3 the compounds crystallize in the alpha-ThSi2 type structure and for 0.7 &lt; x &lt; 1.3 they order ferromagnetically below 14 K. Our complementary studies for x = 0.8 reveal that it is a complex system due to the Kondo scattering competing with the RKKY interactions. The transition from the paramagnetic to the ferromagnetic state takes place at T-C = 12.5(1) K. Moreover, the Seebeck coefficient and electrical resistivity show not only an anomaly related to the magnetic transition, but also a broad maximum at-90 K related to the crystal field effect. The case of x = 0.8 is of special interest as it is at the crossing of the characteristic temperatures, i.e. T-ord (magnetic ordering temperature)similar to &amp; nbsp; T-K (Kondo temperature) similar to 10 K. Additionally, ab initio electronic structure calculations were performed allowing us to determine phase stability, (revealing two stable phases -alpha-GdSi2-type and alpha-ThSi2-type structures) as well as spin and orbital moment decomposition on Ce-states for both considered structures.

Název v anglickém jazyce

Ferromagnetic CeSi1.2Ga0.8 alloy: Study on magnetocaloric and thermoelectric properties

Popis výsledku anglicky

We present the magnetic, specific heat, electrical resistivity, and thermoelectric power measurements for the intermetallic compound CeSi1.2Ga0.8. This composition belongs to the series CeSi2-xGax, which exhibits diverse magnetic orderings and different crystallographic structures depending on the substitution level x. It has been previously suggested that for 0.0 &lt; x &lt; 1.3 the compounds crystallize in the alpha-ThSi2 type structure and for 0.7 &lt; x &lt; 1.3 they order ferromagnetically below 14 K. Our complementary studies for x = 0.8 reveal that it is a complex system due to the Kondo scattering competing with the RKKY interactions. The transition from the paramagnetic to the ferromagnetic state takes place at T-C = 12.5(1) K. Moreover, the Seebeck coefficient and electrical resistivity show not only an anomaly related to the magnetic transition, but also a broad maximum at-90 K related to the crystal field effect. The case of x = 0.8 is of special interest as it is at the crossing of the characteristic temperatures, i.e. T-ord (magnetic ordering temperature)similar to &amp; nbsp; T-K (Kondo temperature) similar to 10 K. Additionally, ab initio electronic structure calculations were performed allowing us to determine phase stability, (revealing two stable phases -alpha-GdSi2-type and alpha-ThSi2-type structures) as well as spin and orbital moment decomposition on Ce-states for both considered structures.

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/EF16_013%2F0001791" target="_blank" >EF16_013/0001791: IT4Innovations národní superpočítačové centrum - cesta k exascale</a><br>

Návaznosti

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

Rok uplatnění

2022

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

1873-4766

Svazek periodika

547

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

nestrankovano

Kód UT WoS článku

000777035500005

EID výsledku v databázi Scopus

2-s2.0-85119923240