Year: 2005
Type: article
Abstract: We report on magnetic and electrical transport properties of ${\mathrm{Sb}}_{2\ensuremath{-}x}{\mathrm{Cr}}_{x}{\mathrm{Te}}_{3}$ single crystals with $0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.095$ over temperatures from $2\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ to $300\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. A ferromagnetic state develops in these crystals at low temperatures with Curie temperatures that are proportional to $x$ (for $x>0.014$), attaining a maximum value of $20\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ for $x=0.095$. Hysteresis below ${T}_{C}$ for the applied field parallel to the $c$ axis is observed in both magnetization and Hall-effect measurements. Magnetic as well as transport data indicate that Cr takes the $3+(3{d}^{3})$ valence state, substituting for antimony in the host lattice structure, and does not significantly affect the background hole concentration. Analysis of the anomalous Hall effect reveals that skew scattering is responsible for its presence. These results broaden the scope of ferromagnetism in the ${V}_{2}\text{\ensuremath{-}}{VI}_{3}$ diluted magnetic semiconductors (DMS) and in ferromagnetic DMS structures, generally.
Source: Physical Review B
Authors: J. S. Dyck, Č. Drašar, P. Lošt’ák, C. Uher
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W2155240334