Structure and transport properties of La1-xSrxMnO3 granular ceramics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F17%3A00473951" target="_blank" >RIV/68378271:_____/17:00473951 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1361-6463/aa54e7" target="_blank" >http://dx.doi.org/10.1088/1361-6463/aa54e7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6463/aa54e7" target="_blank" >10.1088/1361-6463/aa54e7</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure and transport properties of La1-xSrxMnO3 granular ceramics

Popis výsledku v původním jazyce

Two granular ceramics were prepared by spark plasma sintering (SPS) at 600–800 ˚C and classical ceramic sintering (CCS) at 900 ˚C using molten salt synthesized nanoparticles of the composition La0.53Sr0.47MnO3 and ≈ 40 nm size. Both the SPS and CCS products essentially retain the two-phase magnetic structure of the starting nanoparticles, which consist of a ferromagnetic FM core and an A-type AFM shell. After the sintering, the AFM phase forms a 10–15 nm thick spacer between neighbouring FM granules. This assembly retains reasonable conductivity down to the lowest temperatures, and it still gives rise to a large negative magnetoresistance. In a detailed analysis of the low-field magnetoconductance and high-field magnetoconductance effects, which are related to the field-induced alignment of the FM granules and spin canting in the AFM matrix, respectively, we conclude that the bulk conductivity is governed by resonant tunnelling.

Název v anglickém jazyce

Structure and transport properties of La1-xSrxMnO3 granular ceramics

Popis výsledku anglicky

Two granular ceramics were prepared by spark plasma sintering (SPS) at 600–800 ˚C and classical ceramic sintering (CCS) at 900 ˚C using molten salt synthesized nanoparticles of the composition La0.53Sr0.47MnO3 and ≈ 40 nm size. Both the SPS and CCS products essentially retain the two-phase magnetic structure of the starting nanoparticles, which consist of a ferromagnetic FM core and an A-type AFM shell. After the sintering, the AFM phase forms a 10–15 nm thick spacer between neighbouring FM granules. This assembly retains reasonable conductivity down to the lowest temperatures, and it still gives rise to a large negative magnetoresistance. In a detailed analysis of the low-field magnetoconductance and high-field magnetoconductance effects, which are related to the field-induced alignment of the FM granules and spin canting in the AFM matrix, respectively, we conclude that the bulk conductivity is governed by resonant tunnelling.

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

<a href="/cs/project/GA15-10088S" target="_blank" >GA15-10088S: Magnetismus manganitových částic a jejich útvarů</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics D-Applied Physics

ISSN

0022-3727

e-ISSN

—

Svazek periodika

50

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

—

Kód UT WoS článku

000394099000001

EID výsledku v databázi Scopus

2-s2.0-85011298631