Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2 MnGaO5+δ
M. G. Rozova
1
,
B. Ph. Pavlyuk
1
,
M. V. Lobanov
1
,
Oleg Lebedev
2
,
G. Van Tendeloo
2
,
O.L Ignatchik
3
,
E.A. Ovtchenkov
3
,
YU. A. KOKSHAROV
3
,
A. N. VASIL'EV
3
Publication type: Journal Article
Publication date: 2001-09-01
scimago Q2
wos Q1
SJR: 0.629
CiteScore: 6.8
Impact factor: 3.5
ISSN: 00224596, 1095726X
Materials Chemistry
Ceramics and Composites
Electronic, Optical and Magnetic Materials
Inorganic Chemistry
Physical and Theoretical Chemistry
Condensed Matter Physics
Abstract
New Sr2MnGaO4.97 complex oxide was synthesized by solid state reaction in sealed silica tubes at 950–1000°C. The Sr2MnGaO4.97 crystal structure was refined from X-ray powder diffraction data. Sr2MnGaO4.97 is based on the Ima2 brownmillerite-type structure with apically elongated MnO6 octahedra due to a Jahn–Teller effect. Electron diffraction and high-resolution electron microscopy showed that local ordering of the left-and right-hand chains of GaO4 tetrahedra in Sr2MnGaO4.97 leads to a superstructure with a doubling of the b parameter of the orthorhombic unit cell. The formal oxidation state of Mn (VMn) can be varied by thermal treatments at elevated oxygen pressure (450°C, 20 bar of O2). The oxygen insertion induces a structure transformation in oxidized Sr2MnGaO5.47 material with the formation of a tetragonal perovskite-like structure (a≃ap, c≃2cp) with oxygen vacancies located in the Ga layers. The oxidation is accompanied by a significant compression of the Mn–O apical distances and a suppression of the Jahn–Teller deformation. Both Sr2MnGaO4.97 and Sr2MnGaO5.47 can probably be treated as canted antiferromagnets with TN=150 and 80 K, respectively.
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Rozova M. G. et al. Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2MnGaO5+δ // Journal of Solid State Chemistry. 2001. Vol. 160. No. 2. pp. 353-361.
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Abakumov A. M., Rozova M. G., Pavlyuk B. P., Lobanov M. V., Antipov E. V., Lebedev O., Van Tendeloo G., Ignatchik O., Ovtchenkov E., KOKSHAROV Y. A., VASIL'EV A. N. Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2MnGaO5+δ // Journal of Solid State Chemistry. 2001. Vol. 160. No. 2. pp. 353-361.
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TY - JOUR
DO - 10.1006/jssc.2001.9240
UR - https://linkinghub.elsevier.com/retrieve/pii/S0022459601992400
TI - Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2MnGaO5+δ
T2 - Journal of Solid State Chemistry
AU - Abakumov, Artem M.
AU - Rozova, M. G.
AU - Pavlyuk, B. Ph.
AU - Lobanov, M. V.
AU - Antipov, Evgeny V.
AU - Lebedev, Oleg
AU - Van Tendeloo, G.
AU - Ignatchik, O.L
AU - Ovtchenkov, E.A.
AU - KOKSHAROV, YU. A.
AU - VASIL'EV, A. N.
PY - 2001
DA - 2001/09/01
PB - Elsevier
SP - 353-361
IS - 2
VL - 160
SN - 0022-4596
SN - 1095-726X
ER -
Cite this
BibTex (up to 50 authors)
Copy
@article{2001_Rozova,
author = {Artem M. Abakumov and M. G. Rozova and B. Ph. Pavlyuk and M. V. Lobanov and Evgeny V. Antipov and Oleg Lebedev and G. Van Tendeloo and O.L Ignatchik and E.A. Ovtchenkov and YU. A. KOKSHAROV and A. N. VASIL'EV},
title = {Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2MnGaO5+δ},
journal = {Journal of Solid State Chemistry},
year = {2001},
volume = {160},
publisher = {Elsevier},
month = {sep},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0022459601992400},
number = {2},
pages = {353--361},
doi = {10.1006/jssc.2001.9240}
}
Cite this
MLA
Copy
Rozova, M. G., et al. “Synthesis, crystal structure, and magnetic properties of a novel layered manganese oxide Sr2MnGaO5+δ.” Journal of Solid State Chemistry, vol. 160, no. 2, Sep. 2001, pp. 353-361. https://linkinghub.elsevier.com/retrieve/pii/S0022459601992400.
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