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Naslov:Comparing magnetism in isostructural oxides A[sub](0.8)La[sub](1.2)MnO[sub](4.1) : anisotropic spin glass (A = Ba) versus long range order (A = Sr)
Avtorji:ID Dragomir, Mirela, IJS (Avtor)
ID Dube, Paul A. (Avtor)
ID Arčon, Iztok, UNG (Avtor)
ID Boyer, Chad (Avtor)
ID Rutherford, Meghan (Avtor)
ID Wiebe, Christopher (Avtor)
ID King, Graham (Avtor)
ID Dabkowska, Hanna (Avtor)
ID Greedan, John E. (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:This study presents the strikingly distinct magnetic properties of two isostructural compounds, Ba0.8La1.2MnO4.1 and Sr0.8La1.2MnO4.1 (K2NiF4 type, I4/mmm). Spectroscopic studies have shown that Mn is in a +3.0(1) oxidation state only, in both compounds; therefore, the charge is balanced by accommodating extra oxygen at interstitial sites, as confirmed by neutron powder diffraction. We found that the Ba compound exhibits an exceedingly rare anisotropic spin glass behavior, Tg = 26.4(4) K, with the moment freezing along the c-axis only while the in-plane spin components remain dynamic well below Tg. Experimental results including neutron diffraction, heat capacity, and magnetic (dc and ac) measurements performed on an oriented single crystal support this conclusion. This is a remarkable result, the only other known example of an anisotropic spin glass being Fe2TiO5. The spin glass state in Ba0.8La1.2MnO4.1 is argued to arise due to competing antiferromagnetic and ferromagnetic 180° Mn3+−O−Mn3+ superexchange interactions. In contrast, the Sr analogue shows 2D antiferromagnetic correlations and long-range antiferromagnetic order below 95(1) K with a remarkably reduced ordered moment of 1.449(49) μB/Mn3+ instead of the ∼4 μB expected for an S = 2 ion.
Ključne besede:antiferomagnetiki, Mn XANES, struktura
Verzija publikacije:Objavljena publikacija
Leto izida:2019
Št. strani:7833-7844
Številčenje:31
PID:20.500.12556/RUNG-4814-d5964a61-ec7b-b532-46e3-ab7b44668f01 Novo okno
COBISS.SI-ID:32603431 Novo okno
ISSN pri članku:0897-4756
DOI:10.1021/acs.chemmater.9b01466 Novo okno
NUK URN:URN:SI:UNG:REP:PUK7SON9
Datum objave v RUNG:23.10.2019
Število ogledov:4328
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
DRAGOMIR, Mirela, DUBE, Paul A., ARČON, Iztok, BOYER, Chad, RUTHERFORD, Meghan, WIEBE, Christopher, KING, Graham, DABKOWSKA, Hanna in GREEDAN, John E., 2019, Comparing magnetism in isostructural oxides A[sub](0.8)La[sub](1.2)MnO[sub](4.1) : anisotropic spin glass (A = Ba) versus long range order (A = Sr). Chemistry of materials [na spletu]. 2019. Vol. 31, p. 7833–7844. [Dostopano 7 april 2025]. DOI 10.1021/acs.chemmater.9b01466. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=4814
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Gradivo je del revije

Naslov:Chemistry of materials
Skrajšan naslov:Chem. mater.
Založnik:The Society
Leto izida:13
ISSN:0897-4756
COBISS.SI-ID:6557189 Novo okno

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