Magnetic and Magnetothermal Properties of Hydrogenated Materials Based on Rare Earths and Iron

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F19%3AN0000057" target="_blank" >RIV/26722445:_____/19:N0000057 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/19:10402236

Výsledek na webu

<a href="https://ieeexplore.ieee.org/document/8890915" target="_blank" >https://ieeexplore.ieee.org/document/8890915</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/LMAG.2019.2951341" target="_blank" >10.1109/LMAG.2019.2951341</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic and Magnetothermal Properties of Hydrogenated Materials Based on Rare Earths and Iron

Popis výsledku v původním jazyce

Iron-rich rare-earth compounds are the basis for high-energy permanent magnets. These include the R(Fe,T)(12), R2Fe17, and R2Fe14B intermetallics (R rare earth; T Ti, V, Mo, Si) that readily absorb hydrogen, which changes their fundamental and functional characteristics. In this letter, we investigate the stability of the magnetic properties of some hydrides with maximum hydrogen content (namely, TmFe11TiH1 and Tm2Fe17H5.5) in a wide temperature range using high magnetic fields. The magnetic phase transition from the ferrimagnetic to the ferromagnetic state was studied immediately after hydrides were obtained, as well as after one year of storage of the samples at ambient temperature. Only the TmFe11TiH hydride is stable over time. The effect of hydrogen on the magnetothermal properties of the Nd2Fe14B and Nd1Pr1Fe14B compounds and a range of magnetic phase transitions were also investigated. Hydrogenation leads to a decrease in the magnetocaloric effect in all investigated compounds as a result of an increase in the distance between magnetically active ions due to the lattice expansion. A magnetic phase diagram is constructed.

Název v anglickém jazyce

Magnetic and Magnetothermal Properties of Hydrogenated Materials Based on Rare Earths and Iron

Popis výsledku anglicky

Iron-rich rare-earth compounds are the basis for high-energy permanent magnets. These include the R(Fe,T)(12), R2Fe17, and R2Fe14B intermetallics (R rare earth; T Ti, V, Mo, Si) that readily absorb hydrogen, which changes their fundamental and functional characteristics. In this letter, we investigate the stability of the magnetic properties of some hydrides with maximum hydrogen content (namely, TmFe11TiH1 and Tm2Fe17H5.5) in a wide temperature range using high magnetic fields. The magnetic phase transition from the ferrimagnetic to the ferromagnetic state was studied immediately after hydrides were obtained, as well as after one year of storage of the samples at ambient temperature. Only the TmFe11TiH hydride is stable over time. The effect of hydrogen on the magnetothermal properties of the Nd2Fe14B and Nd1Pr1Fe14B compounds and a range of magnetic phase transitions were also investigated. Hydrogenation leads to a decrease in the magnetocaloric effect in all investigated compounds as a result of an increase in the distance between magnetically active ions due to the lattice expansion. A magnetic phase diagram is constructed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

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)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

IEEE Magnetics Letters

ISSN

1949-307X

e-ISSN

1949-3088

Svazek periodika

10

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000502726400001

EID výsledku v databázi Scopus

2-s2.0-85075510496