The magnetic and neutron diffraction studies of La1MINUS SIGN xSrxMnO3 nanoparticles prepared via molten salt synthesis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10283333" target="_blank" >RIV/00216208:11310/15:10283333 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0022459614004678" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0022459614004678</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jssc.2014.10.024" target="_blank" >10.1016/j.jssc.2014.10.024</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The magnetic and neutron diffraction studies of La1MINUS SIGN xSrxMnO3 nanoparticles prepared via molten salt synthesis

Popis výsledku v původním jazyce

Series of single-phase La1-xSrxMnO3 nanoparticles (x=0.25-0.47) with the size of about 50 nm was prepared in molten NaNO2. TEM evidenced well dispersed particles that are not interconnected by sintering bridges in contrast to traditional products. Interestingly, some reduction of the perovskite cell volume, particularly at higher Sr-contents, was detected by XRD. Moreover, reduced magnetization and decreased Curie temperature in comparison to sol-gel samples were observed. Neutron diffraction analysis of the as-prepared nanoparticles and several comparative samples with x=0.37 indicated that the anomalous behavior of studied particles probably originate in the overdoped outer shell. The overdoping might result from both the surface oxygen chemisorptionand from an increased Sr concentration in the shell. By all means, the overdoping would lead to compressive surface stress, driving the x=0.37 ground state toward a mixture of FM and A-type AFM ordering as observed by neutron diffraction

Název v anglickém jazyce

The magnetic and neutron diffraction studies of La1MINUS SIGN xSrxMnO3 nanoparticles prepared via molten salt synthesis

Popis výsledku anglicky

Series of single-phase La1-xSrxMnO3 nanoparticles (x=0.25-0.47) with the size of about 50 nm was prepared in molten NaNO2. TEM evidenced well dispersed particles that are not interconnected by sintering bridges in contrast to traditional products. Interestingly, some reduction of the perovskite cell volume, particularly at higher Sr-contents, was detected by XRD. Moreover, reduced magnetization and decreased Curie temperature in comparison to sol-gel samples were observed. Neutron diffraction analysis of the as-prepared nanoparticles and several comparative samples with x=0.37 indicated that the anomalous behavior of studied particles probably originate in the overdoped outer shell. The overdoping might result from both the surface oxygen chemisorptionand from an increased Sr concentration in the shell. By all means, the overdoping would lead to compressive surface stress, driving the x=0.37 ground state toward a mixture of FM and A-type AFM ordering as observed by neutron diffraction

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/GAP108%2F11%2F0807" target="_blank" >GAP108/11/0807: Komplexní magnetické nanočástice s monodisperzními oxidovými jádry a stabilním organickým obalem pro biologický výzkum a biomedicinální aplikace</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

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

221

Číslo periodika v rámci svazku

leden

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

364-372

Kód UT WoS článku

000347263700051

EID výsledku v databázi Scopus

2-s2.0-84925954629