Magnetostructural phase transitions and magnetocaloric effect in Tb-Dy-Ho-Co-Al alloys with a Laves phase structure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10325211" target="_blank" >RIV/00216208:11320/16:10325211 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/16:00485680

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4955047" target="_blank" >http://dx.doi.org/10.1063/1.4955047</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4955047" target="_blank" >10.1063/1.4955047</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetostructural phase transitions and magnetocaloric effect in Tb-Dy-Ho-Co-Al alloys with a Laves phase structure

Popis výsledku v původním jazyce

The influence of simultaneous substitution within the rare earth (R) and Co sublattices on the structural, magnetic, and magnetocaloric properties of the Laves phase RCo2-type compounds is studied. Main attention is devoted to the studies of the magnetostructural phase transitions and the transition types with respect to the alloy composition. Multicomponent alloys Tb-x(Dy0.5Ho0.5)(1-x)Co-2 and Tb-x(Dy0.5Ho0.5)(1-x)Co1.75Al0.25 were prepared with the use of high purity metals. Majority of the Tb-x(Dy0.5Ho0.5)(1-x)Co-2 alloys exhibit magnetic transitions of the first-order type and a large magnetocaloric effect. The substitution of Al for Co in Tb-x(Dy0.5Ho0.5)(1-x)Co-2 increases the Curie temperature (TC) but changes the transition type from first-to the second-order. The discussion of the physical mechanisms behind the observed phenomena is given on the basis of the first principles electronic-structure calculations taking into account both the atomic disorder and the magnetic disorder effects at finite temperatures. The advantage of Al-containing materials is that sufficiently high magnetocaloric effect values are preserved at T> T-C. Published by AIP Publishing.

Název v anglickém jazyce

Magnetostructural phase transitions and magnetocaloric effect in Tb-Dy-Ho-Co-Al alloys with a Laves phase structure

Popis výsledku anglicky

The influence of simultaneous substitution within the rare earth (R) and Co sublattices on the structural, magnetic, and magnetocaloric properties of the Laves phase RCo2-type compounds is studied. Main attention is devoted to the studies of the magnetostructural phase transitions and the transition types with respect to the alloy composition. Multicomponent alloys Tb-x(Dy0.5Ho0.5)(1-x)Co-2 and Tb-x(Dy0.5Ho0.5)(1-x)Co1.75Al0.25 were prepared with the use of high purity metals. Majority of the Tb-x(Dy0.5Ho0.5)(1-x)Co-2 alloys exhibit magnetic transitions of the first-order type and a large magnetocaloric effect. The substitution of Al for Co in Tb-x(Dy0.5Ho0.5)(1-x)Co-2 increases the Curie temperature (TC) but changes the transition type from first-to the second-order. The discussion of the physical mechanisms behind the observed phenomena is given on the basis of the first principles electronic-structure calculations taking into account both the atomic disorder and the magnetic disorder effects at finite temperatures. The advantage of Al-containing materials is that sufficiently high magnetocaloric effect values are preserved at T> T-C. Published by AIP Publishing.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/LM2011025" target="_blank" >LM2011025: LMNT - Laboratoře magnetizmu a nízkých teplot - provoz a rozvoj národní výzkumné infrastruktury</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

—

Svazek periodika

120

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000379583900005

EID výsledku v databázi Scopus

2-s2.0-84977569235