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B. Fisher,J. Genossar,K.B. Chashka,L. Patlagan,G.M. Reisner 한국물리학회 2007 Current Applied Physics Vol.7 No.2
We report on a comparative study ofS(T) for a series of transition-metal double-perovskites A2BB0O6 B0= transition metal ions), some of them known to have half-metallic ground states. For Sr2BB0O6 with BB0= CrMo, CrW, CrRe,FeMo, and FeRe (ferrimagnetic with high Curie temperatures),S(T) is metallic, for B0= Mo and W it is n-type and for B0= Re, p-type.For A2FeMoO 6 accompanied by prominent dierences in their (metallic)S(T). For the insulating Sr2MnReO 6 and Ba2MnReO 6, the onset of ferromag-netic order belowTc . 120 K is marked by a steep drop ofS(T) accompanied by only a slight change in the slope of lnq versus 1/T1/2.Signicant conclusions were drawn from the experimental results without the need for elaborate models.