Structural, magnetic and magnetocaloric properties of NdPrFe14B and its hydrides

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10419193" target="_blank" >RIV/00216208:11320/19:10419193 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/19:00520916

Výsledek na webu

<a href="https://doi.org/10.1088/1742-6596/1389/1/012094" target="_blank" >https://doi.org/10.1088/1742-6596/1389/1/012094</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/1389/1/012094" target="_blank" >10.1088/1742-6596/1389/1/012094</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural, magnetic and magnetocaloric properties of NdPrFe14B and its hydrides

Popis výsledku v původním jazyce

A systematic study of the influence of interstitial hydrogen on the structure, morphology of surface, magnetic and magnetothermal properties in multicomponent (Nd0.5Pr0.5)(2)Fe14BHx (x = 0; 2.7; 4.3) are reported. Partial substitution of Pr for Nd allows a decrease of the spin-reorientation transition temperature from 135 K for Nd2Fe14B to 73 K for (Nd0.5Pr0.5)(2)Fe14B. Hydrides (Nd0.5Pr0.5)(2)Fe14BHx crystallize in a tetragonal crystal structure (space group P42/mnm) of the Nd2Fe14B-type. Both lattice constants and unit cell volume increase upon hydrogen absorption. It was also found that the surface of the hydrogenated sample was very severely damaged by the introduction of hydrogen. Magnetic studies of both initial compound and the hydrides were performed on bulk and powder samples in static and pulsed magnetic fields up to 14 and 58 T, respectively. Hydrogenation has a significant effect on magnetic properties of a multicomponent alloy (Nd0.5Pr0.5)(2)Fe14B: Curie temperature and saturation magnetization increase, while temperature of SRT decreases (T-SRT = 63 K for (Nd0.5Pr0.5)(2)Fe14BHx with x = 2.7 and 4.3). The magnetocaloric effect (MCE) in the range of spin-reorientation transition also decreases significantly. We analyzed magnetic properties of (Nd0.5Pr0.5)(2)Fe14BHx and compare them with that of Nd2Fe14BHx . Magnetic phase diagrams are constructed.

Název v anglickém jazyce

Structural, magnetic and magnetocaloric properties of NdPrFe14B and its hydrides

Popis výsledku anglicky

A systematic study of the influence of interstitial hydrogen on the structure, morphology of surface, magnetic and magnetothermal properties in multicomponent (Nd0.5Pr0.5)(2)Fe14BHx (x = 0; 2.7; 4.3) are reported. Partial substitution of Pr for Nd allows a decrease of the spin-reorientation transition temperature from 135 K for Nd2Fe14B to 73 K for (Nd0.5Pr0.5)(2)Fe14B. Hydrides (Nd0.5Pr0.5)(2)Fe14BHx crystallize in a tetragonal crystal structure (space group P42/mnm) of the Nd2Fe14B-type. Both lattice constants and unit cell volume increase upon hydrogen absorption. It was also found that the surface of the hydrogenated sample was very severely damaged by the introduction of hydrogen. Magnetic studies of both initial compound and the hydrides were performed on bulk and powder samples in static and pulsed magnetic fields up to 14 and 58 T, respectively. Hydrogenation has a significant effect on magnetic properties of a multicomponent alloy (Nd0.5Pr0.5)(2)Fe14B: Curie temperature and saturation magnetization increase, while temperature of SRT decreases (T-SRT = 63 K for (Nd0.5Pr0.5)(2)Fe14BHx with x = 2.7 and 4.3). The magnetocaloric effect (MCE) in the range of spin-reorientation transition also decreases significantly. We analyzed magnetic properties of (Nd0.5Pr0.5)(2)Fe14BHx and compare them with that of Nd2Fe14BHx . Magnetic phase diagrams are constructed.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LM2018096" target="_blank" >LM2018096: Laboratoř pro syntézu a měření materiálů</a><br>

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

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Journal of Physics: Conference Series

ISBN

—

ISSN

1742-6588

e-ISSN

1742-6596

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

IOP PUBLISHING LTD

Místo vydání

BRISTOL

Místo konání akce

RAS

Datum konání akce

8. 9. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000562319800094