CaCu 3 Mn 2 Te 2 O 12 : An Intrinsic Ferrimagnetic Insulator Prepared Under High Pressure
CaCu Mn Te O was synthesized using high-temperature and high-pressure conditions. The compound possesses an A- and B site ordered quadruple perovskite structure in 3̅ symmetry with the charge combination of CaCu Mn Te O . A ferrimagnetic phase transition originating from the antiferromagnetic intera...
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Published in | Inorganic chemistry Vol. 62; no. 51; pp. 21233 - 21239 |
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Main Authors | , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
25.12.2023
|
Online Access | Get full text |
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Summary: | CaCu
Mn
Te
O
was synthesized using high-temperature and high-pressure conditions. The compound possesses an A- and B site ordered quadruple perovskite structure in
3̅ symmetry with the charge combination of CaCu
Mn
Te
O
. A ferrimagnetic phase transition originating from the antiferromagnetic interaction between A' site Cu
and B site Mn
ions is found to occur at
≈ 100 K. CaCu
Mn
Te
O
also shows insulating electric conductivity. Optical measurement demonstrates the energy bandgap to be about 1.9 eV, in agreement with the high B site degree of chemical order between Mn
and Te
. The first-principles theoretical calculations confirm the Cu
(↓)-Mn
(↑) ferrimagnetic coupling as well as the insulating nature with an up-spin direct bandgap. The current CaCu
Mn
Te
O
provides an intriguing example of an intrinsic ferrimagnetic insulator with promising applications in advanced spintronic devices. |
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ISSN: | 0020-1669 1520-510X |
DOI: | 10.1021/acs.inorgchem.3c03288 |