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High- versus low-spin Ni2+ in elongated octahedral environments: Sr2NiO2Cu2Se2, Sr2NiO2Cu2S2, and Sr2NiO2Cu2(Se1–xSx)2

Abstract:

Sr2NiO2Cu2Se2, comprising alternating [Sr2NiO2]2+and [Cu2Se2]2-layers, is reported. Powder neutron diffraction shows that the Ni2+ions, which are in a highly elongated NiO4Se2environment with D4hsymmetry, adopt a high-spin configuration and carry localized magnetic moments which order antiferromagnetically below 160 K in a 2a × 2a × 2c expansion of the nuclear cell with an ordered moment of 1.31(2) μBper Ni2+ion. The adoption of the high-spin configuration for this d8cation in a pseudo-square...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1021/acs.chemmater.2c02002

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Role:
Author
ORCID:
0000-0002-5252-6333
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Name:
Engineering & Physical Sciences Research Council
Grant:
EP/P018874/1
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Name:
Engineering and Physical Sciences Research Council
Grant:
EP/T027991/1
EP/R042594/1
Publisher:
American Chemical Society
Journal:
Chemistry of Materials More from this journal
Volume:
34
Issue:
21
Pages:
9503–9516
Publication date:
2022-10-18
Acceptance date:
2022-09-23
DOI:
EISSN:
1520-5002
ISSN:
0897-4756
Language:
English
Keywords:
Pubs id:
1300020
Local pid:
pubs:1300020
Deposit date:
2022-11-11

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