Room-Temperature Ferromagnetism in InSb-Mn Nanowires
2019
The successful synthesis
of one-dimensional nanostructures of a
narrow band gap semiconductor, exhibiting a ferromagnetic response
at room temperature, is reported. High-quality nanowires of InSb-Mn
have been produced by template-assisted pulse electrodeposition. Detailed
structural and spectroscopic characterizations revealed good crystallinity,
a narrow size distribution of the nanostructures, and the ability
to control the Mn doping level. The dominating magnetic response at
a cryogenic temperature evolves with an increasing Mn concentration
from paramagnetic through antiferromagnetic to ferromagnetic. A robust
ferromagnetic response of InSb nanowires doped with 2.5% at. of Mn
is retained up to a Curie temperature of nearly 500 K.
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