We studied magnetic and electric properties new magnetic semiconductor CuCr1.5Sb0.5S4 and compounds with Co. All compounds are characteristic for antiferromagnetics. A giant negative magnetoresictance (for the compound with x=0.25 -16% in a magnetic field of 27 kOe, with x=0.5 -24% in a field of 30 kOe ) has been fond in the new magnetic semiconductors xCoCr2S4 - (1-x)CuCr1.5Sb0.5>S4, (x=0.25;0.5). Magnetoresistance in practically absent in CuCr1.5Sb0.5S4 and does not exceed 2% in CoCr2S4. The giant magnetoresistance and the positive value of θ are evidence for the existence of afmons in compound with Co.
We studied magnetic and electric properties new magenetic semicondcutors CuCr1.5Sb0.5S4 with Co. All compounds are characteristic for antiferromagnetics. A giant negative magnetoresistance has been found in the new magnetic semiconductors xCoCr2S4 - (1-x)CuCr1.5Sb0.5>S4, (x=0.25;0.5). Magnetoresistance is practically absent in CuCr1.5Sb0.5S4 and does not exceed 2% in CoCr2S4. The giant magnetoresistance and the postivie value of e are evidence for the existence of afmons in compounds with Ni.
KEYWORDS: Magnetism, Magnetic semiconductors, Temperature metrology, Semiconductors, Glasses, 3D modeling, Semiconductor materials, Seaborgium, Spinel, Solids
New compounds with spinel structure CuCr1.5+xSb0.5-xS4(0≤x≤0.3) were obtained and studied in detail. All the compounds are non-degenerate semiconductores. The compounds (0≤x≤0.1) were found to have the magnetic properties characteristic for antiferromagnets. Compounds (0.2≤x≤0.3) have a spontaneous magnetization, with the Curie point of the compound with x=0.3, Tc = 334 K, being higher than room temperature. The re-entrant spin glass transition is observed in the compounds with x=0.17;0.2)
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