Low-temperature magnetic transitions in Fe2MnSi Heusler alloys prepared in bulk and ribbon form

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00510536" target="_blank" >RIV/68081723:_____/19:00510536 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27240/19:10239644

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0304885318322650?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0304885318322650?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2018.11.113" target="_blank" >10.1016/j.jmmm.2018.11.113</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low-temperature magnetic transitions in Fe2MnSi Heusler alloys prepared in bulk and ribbon form

Popis výsledku v původním jazyce

Microstructural and magnetic properties of the Fe2MnSi Heusler alloys in the bulk and ribbon form have been investigated from a viewpoint of technology of their production. The bulk alloys were prepared by arc and induction melting while for the ribbon-type samples the planar flow casting technology was used. X-ray diffraction has confirmed a presence of the L2(1) cubic phase in both polished 500 mu m thick discs cut from a button and cylinder type ingots of the same chemical composition and in the 20 mu m thick and 2mm wide ribbon. Values of lattice parameters (0.560-0.571 nm) obtained for discs and both ribbon sides were almost independent on technology, which, on the other hand, has markedly influenced the microstructure yielding the large size of grains and grain boundaries in the disc samples in comparison to about two orders of magnitude smaller grains in the ribbon sample. From the magnetic viewpoint all alloys were paramagnetic at a room temperature contrary to their magnetic behaviour at low temperatures. The slight excess of Mn at the expense of Fe in the chemical composition of the ribbon sample detected by the energy dispersive X-ray spectroscopy has contributed to a marked positive shift of the Curie temperature (T-c approximate to 270 K and 215-230 K for ribbon and bulk samples, respectively). The second magnetic transition of a magnetic moment re-orientation observed at about 69 K was similar for all kinds of samples.

Název v anglickém jazyce

Low-temperature magnetic transitions in Fe2MnSi Heusler alloys prepared in bulk and ribbon form

Popis výsledku anglicky

Microstructural and magnetic properties of the Fe2MnSi Heusler alloys in the bulk and ribbon form have been investigated from a viewpoint of technology of their production. The bulk alloys were prepared by arc and induction melting while for the ribbon-type samples the planar flow casting technology was used. X-ray diffraction has confirmed a presence of the L2(1) cubic phase in both polished 500 mu m thick discs cut from a button and cylinder type ingots of the same chemical composition and in the 20 mu m thick and 2mm wide ribbon. Values of lattice parameters (0.560-0.571 nm) obtained for discs and both ribbon sides were almost independent on technology, which, on the other hand, has markedly influenced the microstructure yielding the large size of grains and grain boundaries in the disc samples in comparison to about two orders of magnitude smaller grains in the ribbon sample. From the magnetic viewpoint all alloys were paramagnetic at a room temperature contrary to their magnetic behaviour at low temperatures. The slight excess of Mn at the expense of Fe in the chemical composition of the ribbon sample detected by the energy dispersive X-ray spectroscopy has contributed to a marked positive shift of the Curie temperature (T-c approximate to 270 K and 215-230 K for ribbon and bulk samples, respectively). The second magnetic transition of a magnetic moment re-orientation observed at about 69 K was similar for all kinds of samples.

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

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

Journal of Magnetism and Magnetic Materials

ISSN

0304-8853

e-ISSN

—

Svazek periodika

475

Číslo periodika v rámci svazku

APR

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

5-9

Kód UT WoS článku

000458152000002

EID výsledku v databázi Scopus

2-s2.0-85057342796