Synthesis of colloidal MnAsSb nanoparticles: compositional inhomogeneity and magnetic consequences
The ternary manganese pnictide phases, MnAs 1− x Sb x , are of interest for magnetic refrigeration and waste heat recovery due to their magnetocaloric properties, maximized at the Curie temperature ( T C ), which varies from 580-240 K, depending on composition. Nanoparticles potentially enable appli...
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| Veröffentlicht in: | Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2021-10, Vol.9 (38), p.13292-1333 |
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| Format: | Artikel |
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| Zusammenfassung: | The ternary manganese pnictide phases, MnAs
1−
x
Sb
x
, are of interest for magnetic refrigeration and waste heat recovery due to their magnetocaloric properties, maximized at the Curie temperature (
T
C
), which varies from 580-240 K, depending on composition. Nanoparticles potentially enable application in microelectronics (cooling) or graded composites that can operate over a wide temperature range, but manganese pnictides are synthetically challenging to realize as discrete nanoparticles and their fundamental magnetic properties have not been extensively studied. Accordingly, colloidal synthesis methods were employed to target discrete MnAs
x
Sb
1−
x
nanoparticles (
x
= 0.1-0.9) by arrested precipitation reactions of Mn
2
(CO)
10
with (C
6
H
5
)
3
As&z.dbd;O and (C
6
H
5
)
3
Sb in coordinating solvents. The MnAs
x
Sb
1−
x
particles are spherical in morphology with average diameters 10-13 nm (standard deviations |
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| ISSN: | 2050-7526 2050-7534 |
| DOI: | 10.1039/d1tc02479e |