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Abstract Single crystals of disordered Mn4–xCrxAl11have been synthesized via the flux method. EDS on several crystals of various sizes and shapes revealed an average molar ratio of 17:9:74 for Mn:Cr:Al, while X-ray diffraction on three different crystals yield compositions Mn2.26Cr1.74Al11(Mn4–xCrxAl11,x= 1.74), Mn0.83Cr3.17Al11, and Mn1.07Cr2.93Al11. This compound crystallizes in space groupP–1, isostructural with both Mn4Al11and Cr4Al11. Magnetic measurements on several crystals show that this disordered compound is ferrimagnetic with a low effective moment ofμeff≈1.012±0.004 μB/f.u. and a non-reachable transition temperature. DFT calculations display opening of a bandgap in the spin-up channel near the Fermi level with increasing Cr content, an indication of half-metallicity.
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This content will become publicly available on April 8, 2026
Potential dependent degradation of spinel LiMn 2 O 4 (LMO) and related structures assessed via manganese- and oxygen-sensitive scanning electrochemical microscopy
Small electrodes capable of detecting Mn dissolution and oxygen evolution are placed near operating Mn-based lithium-ion battery cathodes to track their degradation, informing on mechanism and revealing how additives might help decrease degradation.
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- Award ID(s):
- 2404245
- PAR ID:
- 10600856
- Publisher / Repository:
- Royal Society of Chemistry
- Date Published:
- Journal Name:
- Journal of Materials Chemistry A
- Volume:
- 13
- Issue:
- 15
- ISSN:
- 2050-7488
- Page Range / eLocation ID:
- 10540 to 10549
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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