Hexagonal ferrites of X-, W-, and M-type in the system Sr-Fe-O: A comparative study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10316938" target="_blank" >RIV/00216208:11320/15:10316938 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jssc.2015.02.007" target="_blank" >http://dx.doi.org/10.1016/j.jssc.2015.02.007</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jssc.2015.02.007" target="_blank" >10.1016/j.jssc.2015.02.007</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hexagonal ferrites of X-, W-, and M-type in the system Sr-Fe-O: A comparative study

Popis výsledku v původním jazyce

Three hexagonal ferrites from the Fe-rich part of the pseudo-binary system SrO-Fe203 were investigated. Besides the well-known M-type SrFe12O19 two other ferrites were found to exist at high temperatures: W-type SrFe22+Fe163+O27 and X-type Sr2Fe22+Fe283+O46 ferrites. A detailed characterization of the X-type Srferrite is reported here for the first time using XRD, HRTEM, magnetization measurements, Mössbauer and Fe-57 NMR spectroscopies and ab initio calculations of the electronic structure. The resultsare compared to those of W- and M-type Sr ferrites. Mossbauer spectra were analyzed with six Fe contributions in the case of the X-type, seven Fe-sites for the W-type and five Fe sites for the M-type in agreement with crystal structure arrangements. Based on a detailed analysis of the NMR spectra in comparison with ab initio calculations the NMR lines were assigned to individual crystal sites. A preferential occupation of ferrous ions in the S blocks of the X- and W-type ferrites was el

Název v anglickém jazyce

Hexagonal ferrites of X-, W-, and M-type in the system Sr-Fe-O: A comparative study

Popis výsledku anglicky

Three hexagonal ferrites from the Fe-rich part of the pseudo-binary system SrO-Fe203 were investigated. Besides the well-known M-type SrFe12O19 two other ferrites were found to exist at high temperatures: W-type SrFe22+Fe163+O27 and X-type Sr2Fe22+Fe283+O46 ferrites. A detailed characterization of the X-type Srferrite is reported here for the first time using XRD, HRTEM, magnetization measurements, Mössbauer and Fe-57 NMR spectroscopies and ab initio calculations of the electronic structure. The resultsare compared to those of W- and M-type Sr ferrites. Mossbauer spectra were analyzed with six Fe contributions in the case of the X-type, seven Fe-sites for the W-type and five Fe sites for the M-type in agreement with crystal structure arrangements. Based on a detailed analysis of the NMR spectra in comparison with ab initio calculations the NMR lines were assigned to individual crystal sites. A preferential occupation of ferrous ions in the S blocks of the X- and W-type ferrites was el

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

<a href="/cs/project/GPP204%2F12%2FP352" target="_blank" >GPP204/12/P352: Vztah struktury a vlastností magnetických a multiferoických hexaferitů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Journal of Solid State Chemistry

ISSN

0022-4596

e-ISSN

—

Svazek periodika

226

Číslo periodika v rámci svazku

MAR

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

133-141

Kód UT WoS článku

000354152500020

EID výsledku v databázi Scopus

2-s2.0-84924260507