Influence of Zn-Zr ions on microstructural and magnetic properties of Ba hexaferrites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F04%3A00341111" target="_blank" >RIV/61388980:_____/04:00341111 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Zn-Zr ions on microstructural and magnetic properties of Ba hexaferrites

Popis výsledku v původním jazyce

Magneto crystalline structure and magnetic properties of BaFe12-2xZnxZrxO19 compounds with 0.0 less than or equal to x less than or equal to 0.6 were investigated by Mosbauer spectroscopy, thermornagnetic analysis, vibrating sample magnetometry, and TEMmicroscopy. The ferrite powders were prepared by ball milling (Mx) and by modified citrate precursor method (Sk), respectively. Relatively large change of the coercivity H-c (from 376 kA/m down to 179 kA/m) with increase of x was obtained for (Sk) samples as a result of preferable 2b and 4f(2) sites occupation by Zn-Zr ions. The temperature coefficient of the coercivity dH(c)/dT approaches the value 0.14 kA/mdegreesC at x = 0.6 for (Mx) samples. Substituted Zn-Zr ions likely occupy also 4f(1) and 12k sites for x greater than or equal to 0.4, which leads to a slight reduction in the specific magnetic polarization. Selected powder samples were treated by milling in an NaCl flux after calcination for achieving fine particles.

Název v anglickém jazyce

Influence of Zn-Zr ions on microstructural and magnetic properties of Ba hexaferrites

Popis výsledku anglicky

Magneto crystalline structure and magnetic properties of BaFe12-2xZnxZrxO19 compounds with 0.0 less than or equal to x less than or equal to 0.6 were investigated by Mosbauer spectroscopy, thermornagnetic analysis, vibrating sample magnetometry, and TEMmicroscopy. The ferrite powders were prepared by ball milling (Mx) and by modified citrate precursor method (Sk), respectively. Relatively large change of the coercivity H-c (from 376 kA/m down to 179 kA/m) with increase of x was obtained for (Sk) samples as a result of preferable 2b and 4f(2) sites occupation by Zn-Zr ions. The temperature coefficient of the coercivity dH(c)/dT approaches the value 0.14 kA/mdegreesC at x = 0.6 for (Mx) samples. Substituted Zn-Zr ions likely occupy also 4f(1) and 12k sites for x greater than or equal to 0.4, which leads to a slight reduction in the specific magnetic polarization. Selected powder samples were treated by milling in an NaCl flux after calcination for achieving fine particles.

Druh

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

CEP obor

CA - Anorganická chemie

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Czechoslovak Journal of Physics

ISSN

0011-4626

e-ISSN

—

Svazek periodika

54

Číslo periodika v rámci svazku

P2SD

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

4

Strana od-do

—

Kód UT WoS článku

000227059000066

EID výsledku v databázi Scopus

—