Vibhakar, AM;
Khalyavin, DD;
Manuel, P;
Steinke, NJ;
Zhang, L;
Yamaura, K;
Belik, AA;
(2023)
Magnetic inhomogeneities in the quadruple perovskite manganite [Y_{2-x}Mn_{x}] Mn_{6}O_{12}.
Physical Review B
, 108
(5)
, Article 054403. 10.1103/PhysRevB.108.054403.
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Abstract
A combination of competing exchange interactions and substitutional disorder gives rise to magnetic inhomogeneities in the [Y_{2-x}Mn_{x}]Mn_{6}O-{12}x = 0.23 and 0.16 quadruple perovskite manganites. Our neutron powder scattering measurements show that both the x=0.23 and 0.16 samples separate into two distinct magnetic phases; below T_{1} = 120 ± 10 K the system undergoes a transition from a paramagnetic phase to a phase characterized by short-range antiferromagnetic clusters contained in a paramagnetic matrix, and below T2≈65 K the system is composed of well-correlated long-range collinear ferrimagnetic order, punctuated by short-range antiferromagnetic clusters. A sharp increase in the antiferromagnetic phase fraction is observed below ≈33 K, concomitant with a decrease in the ferrimagnetic phase fraction. Our results demonstrate that the theoretically proposed antiferromagnetic phase is stabilized in the [Y_{2-x}Mn_{x}] Mn_{6}O_{12} manganites in the presence of dominant B-B exchange interactions, as predicted.
| Type: | Article |
|---|---|
| Title: | Magnetic inhomogeneities in the quadruple perovskite manganite [Y_{2-x}Mn_{x}] Mn_{6}O_{12} |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevB.108.054403 |
| Publisher version: | https://doi.org/10.1103/PhysRevB.108.054403 |
| Language: | English |
| Additional information: | © 2023 American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10175845 |
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