Low-temperature magnetothermodynamics performance of Tb1-xErxNi2 laves-phases compounds for designing composite refrigerants

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00566432" target="_blank" >RIV/68378271:_____/22:00566432 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0337756" target="_blank" >https://hdl.handle.net/11104/0337756</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/cryst12070931" target="_blank" >10.3390/cryst12070931</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low-temperature magnetothermodynamics performance of Tb1-xErxNi2 laves-phases compounds for designing composite refrigerants

Popis výsledku v původním jazyce

Heat capacity measurements are performed on the polycrystalline Tb1-xErxNi2 intermetallic compounds with x = 0.25, 0.5 and 0.75. The Debye temperatures and lattice contributions as well as the magnetic part of the heat capacity were determined and analyzed. We find that the substitution of Tb atoms for Er atoms leads to a linear reduction of the Curie temperatures from 28.3 K in Tb0.25Er0.75Ni2 to 12.9 K in Tb0.75Er0.25Ni2. We calculate with good approximation the isothermal magnetic entropy ∆Smag and adiabatic temperature changes ∆Tad for Tb1-xErxNi2, for the magnetic field value equal to 1 T and 2 T. The optimal molar ratios of individual Tb0.75Er0.25Ni2, Tb0.5Er0.5Ni2 and Tb0.25Er0.75Ni2 components in the final composite were theoretically determined. According to the obtained results, the investigated composites make promising candidates that can find their application as an active body in a magnetic refrigerator performing an Ericsson cycle at low temperatures.

Název v anglickém jazyce

Low-temperature magnetothermodynamics performance of Tb1-xErxNi2 laves-phases compounds for designing composite refrigerants

Popis výsledku anglicky

Heat capacity measurements are performed on the polycrystalline Tb1-xErxNi2 intermetallic compounds with x = 0.25, 0.5 and 0.75. The Debye temperatures and lattice contributions as well as the magnetic part of the heat capacity were determined and analyzed. We find that the substitution of Tb atoms for Er atoms leads to a linear reduction of the Curie temperatures from 28.3 K in Tb0.25Er0.75Ni2 to 12.9 K in Tb0.75Er0.25Ni2. We calculate with good approximation the isothermal magnetic entropy ∆Smag and adiabatic temperature changes ∆Tad for Tb1-xErxNi2, for the magnetic field value equal to 1 T and 2 T. The optimal molar ratios of individual Tb0.75Er0.25Ni2, Tb0.5Er0.5Ni2 and Tb0.25Er0.75Ni2 components in the final composite were theoretically determined. According to the obtained results, the investigated composites make promising candidates that can find their application as an active body in a magnetic refrigerator performing an Ericsson cycle at low temperatures.

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

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Crystals

ISSN

2073-4352

e-ISSN

2073-4352

Svazek periodika

12

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

931

Kód UT WoS článku

000833741800001

EID výsledku v databázi Scopus

2-s2.0-85133525435