Magnetic behavior of (CuIn)1-xMn2xTe2
Journal of Applied Physics
Magnetic susceptibility measurements have been made on the chalcopyrite diluted magnetic semiconductor (CuIn)1-xMn2xTe2 for concentrations 0.01≤x≤0.101 and temperatures 33 mK≤T≤300 K. Samples with x≳0.05 had similar values of the effective nearest-neighbor exchange constant, with Jeff/kB≊-18.5 K. The strength of Jeff fell sharply in samples with lower x, a characteristic not seen in wide band gap II-VI based alloys. Low-field ac susceptibility measurements showed spin-glass behavior. Analysis of freezing temperature T f vs x data showed a possible crossover between different modes of exchange, coincident with the sharp drop in Jeff. Preliminary carrier concentration data suggests that the crossover may be driven by increased numbers of free holes in some samples.
Original Publication Date
DOI of published version
Shand, P. M.; Polstra, P. A.; Miotkowski, I.; and Crooker, B. C., "Magnetic behavior of (CuIn)1-xMn2xTe2" (1994). Faculty Publications. 4314.