Magnetic phase diagram of the charge oredered manganite Pr0.8Na0.2MnO3

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic phase diagram of the charge oredered manganite Pr0.8Na0.2MnO3

Popis výsledku v původním jazyce

Pr1-xNaxMnO3 solid solutions up to x=0.25 were prepared. Irrespective of magnetic order all samples are electrically insulating. The TC reaches maximum at 125 K for x = 0.15; the samples with x ł 0.2 are charge-ordered antiferromagnets. The x = 0.2 antiferromagnetic charge-ordered insulator (AFCO) can be switched to the ferromagnetic metallic state (FMM) by application of a relatively weak external magnetic field. This accompanied by huge CMR effect, irreversible at low temperatures. The neutron diffraction data show a decoupling of charge order (TCO=215 K) and long range AF order of the "pseudo" CE (TN=175 K). The specific heat at 14 T confirmed the transformation of the x = 0.2 sample to FMM state and nature of the AFCO-FMM transition was probed bymagnetic moment and electrical resistivity relaxation measurements. This compherensive characterization of the sample led to a complete determination of the magnetic phase diagram which demonstrated the near degeneracy of the ferro- and ant

Název v anglickém jazyce

Magnetic phase diagram of the charge oredered manganite Pr0.8Na0.2MnO3

Popis výsledku anglicky

Pr1-xNaxMnO3 solid solutions up to x=0.25 were prepared. Irrespective of magnetic order all samples are electrically insulating. The TC reaches maximum at 125 K for x = 0.15; the samples with x ł 0.2 are charge-ordered antiferromagnets. The x = 0.2 antiferromagnetic charge-ordered insulator (AFCO) can be switched to the ferromagnetic metallic state (FMM) by application of a relatively weak external magnetic field. This accompanied by huge CMR effect, irreversible at low temperatures. The neutron diffraction data show a decoupling of charge order (TCO=215 K) and long range AF order of the "pseudo" CE (TN=175 K). The specific heat at 14 T confirmed the transformation of the x = 0.2 sample to FMM state and nature of the AFCO-FMM transition was probed bymagnetic moment and electrical resistivity relaxation measurements. This compherensive characterization of the sample led to a complete determination of the magnetic phase diagram which demonstrated the near degeneracy of the ferro- and ant

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2001

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

89

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

2

Strana od-do

7413-7415

Kód UT WoS článku

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EID výsledku v databázi Scopus

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