Magnetic and magnetotransport properties of misfit cobaltate Ca3Co3.93O91d

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F12%3A43893210" target="_blank" >RIV/60461373:22310/12:43893210 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/12:43893210

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.3677312" target="_blank" >http://dx.doi.org/10.1063/1.3677312</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.3677312" target="_blank" >10.1063/1.3677312</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic and magnetotransport properties of misfit cobaltate Ca3Co3.93O91d

Popis výsledku v původním jazyce

Samples of Ca3Co3.93O9?d, prepared by classical ceramic route (CCR) and spark plasma sintering (SPS), were characterized by means of magnetic, electrical, and thermal experiments in a broad temperature range. The low temperature specific heat measured down to 0.3 K, reveals two important electronic contributions: the first one, dominated by magnetic excitations, that can be suppressed by an external magnetic field, and the second, due to band-like carriers, characterized by c50 mJ mol1 K1 for both samples. The ferrimagnetism, associated with the long-range magnetic order of IS Co3? species in rock-salt blocks detected below TF 15 K in the CCR samples, is absent in the SPS samples. Similarly, the specific heat peaks detected for the CCR sample at 410 and 840 K are not reproduced in the case of the SPS sample. In both samples the low temperature thermoelectric power is quantitatively explained by supposing the strongly correlated carriers are carrying the spin entropy. The lower hole con

Název v anglickém jazyce

Magnetic and magnetotransport properties of misfit cobaltate Ca3Co3.93O91d

Popis výsledku anglicky

Samples of Ca3Co3.93O9?d, prepared by classical ceramic route (CCR) and spark plasma sintering (SPS), were characterized by means of magnetic, electrical, and thermal experiments in a broad temperature range. The low temperature specific heat measured down to 0.3 K, reveals two important electronic contributions: the first one, dominated by magnetic excitations, that can be suppressed by an external magnetic field, and the second, due to band-like carriers, characterized by c50 mJ mol1 K1 for both samples. The ferrimagnetism, associated with the long-range magnetic order of IS Co3? species in rock-salt blocks detected below TF 15 K in the CCR samples, is absent in the SPS samples. Similarly, the specific heat peaks detected for the CCR sample at 410 and 840 K are not reproduced in the case of the SPS sample. In both samples the low temperature thermoelectric power is quantitatively explained by supposing the strongly correlated carriers are carrying the spin entropy. The lower hole con

Druh

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

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA203%2F09%2F1036" target="_blank" >GA203/09/1036: Termoelektrické kobaltity</a><br>

Návaznosti

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

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Journal Applied Phys.

ISSN

0021-8979

e-ISSN

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Svazek periodika

111

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

3

Strana od-do

"07D715"

Kód UT WoS článku

000303282401178

EID výsledku v databázi Scopus

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