Charge localization and magnetocrystalline anisotropy in La, Pr, and Nd substituted Sr hexaferrites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10316951" target="_blank" >RIV/00216208:11320/15:10316951 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1103/PhysRevB.92.125125" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.92.125125</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.92.125125" target="_blank" >10.1103/PhysRevB.92.125125</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Charge localization and magnetocrystalline anisotropy in La, Pr, and Nd substituted Sr hexaferrites

Popis výsledku v původním jazyce

Charge compensation in strontium M-type hexaferrites A(x)(3+)Sr(1-x)Fe(12)O(19) (A = La, Nd, or Pr) is studied by means of calculations of electronic structure and Fe-57 nuclear magnetic resonance (NMR) experiments. Two different states are realized in the calculations: a localized scenario as a ground state with the extra valence charge preferentially in the octahedral 2a sites and a delocalized scenario with the charge delocalized over multiple sites. From the calculations and NMR experiments, it is deduced that the localized state Fe2+(2a) occurs at low temperatures regardless of the type of used substitution and that the distribution of ferric and ferrous ions within the 2a sublattice is static at low temperatures. The magnetocrystalline anisotropyenergy of Sr and La hexaferrites is calculated and the contributions of individual Fe sublattices are evaluated. The temperature dependence of the anisotropy for La hexaferrite is explained as a transition between localized and delocaliz

Název v anglickém jazyce

Charge localization and magnetocrystalline anisotropy in La, Pr, and Nd substituted Sr hexaferrites

Popis výsledku anglicky

Charge compensation in strontium M-type hexaferrites A(x)(3+)Sr(1-x)Fe(12)O(19) (A = La, Nd, or Pr) is studied by means of calculations of electronic structure and Fe-57 nuclear magnetic resonance (NMR) experiments. Two different states are realized in the calculations: a localized scenario as a ground state with the extra valence charge preferentially in the octahedral 2a sites and a delocalized scenario with the charge delocalized over multiple sites. From the calculations and NMR experiments, it is deduced that the localized state Fe2+(2a) occurs at low temperatures regardless of the type of used substitution and that the distribution of ferric and ferrous ions within the 2a sublattice is static at low temperatures. The magnetocrystalline anisotropyenergy of Sr and La hexaferrites is calculated and the contributions of individual Fe sublattices are evaluated. The temperature dependence of the anisotropy for La hexaferrite is explained as a transition between localized and delocaliz

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

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Review B - Condensed Matter and Materials Physics

ISSN

1098-0121

e-ISSN

—

Svazek periodika

92

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

—

Kód UT WoS článku

000361118600007

EID výsledku v databázi Scopus

2-s2.0-84942475027