| 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.  |
|---|
| 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 |
|---|
| COBISS.SI-ID: | 32603431 |
|---|
| ISSN pri članku: | 0897-4756 |
|---|
| DOI: | 10.1021/acs.chemmater.9b01466 |
|---|
| NUK URN: | URN:SI:UNG:REP:PUK7SON9 |
|---|
| Datum objave v RUNG: | 23.10.2019 |
|---|
| Število ogledov: | 3953 |
|---|
| Število prenosov: | 0 |
|---|
| Metapodatki: |    |
|---|
|
:
|
Kopiraj citat |
|---|
| | | | Skupna ocena: | (0 glasov) |
|---|
| Vaša ocena: | Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. |
|---|
| Objavi na: |  |
|---|
Postavite miškin kazalec na naslov za izpis povzetka. Klik na naslov izpiše
podrobnosti ali sproži prenos. |
