EXPERIMENTAL-EVIDENCE FOR THE EXISTENCE OF AFMONS IN THE ANTIFERROMAGNETIC SEMICONDUCTORS LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.5)

Authors
KOROLEVA LI MASHAEV MK SAIFULLAYEVA DA
Citation
Li. Koroleva et al., EXPERIMENTAL-EVIDENCE FOR THE EXISTENCE OF AFMONS IN THE ANTIFERROMAGNETIC SEMICONDUCTORS LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.5), Journal of magnetism and magnetic materials, 140, 1995, pp. 2045-2046
Citations number
4
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
140
Year of publication
1995
Part
3
Pages
2045 - 2046
Database
ISI
SICI code
0304-8853(1995)140:<2045:EFTEOA>2.0.ZU;2-7
Abstract
A giant negative magnetoresistance (24% in a magnetic field of 30 kOe) has been found in the antiferromagnetic semiconductors xCoCr(2)S(4)-( 1 - x)CuCr1.5Sb0.5S4 (0.25 less than or equal to x less than or equal to 0.5). Magnetoresistance is practically absent in CuCr1.5Sb0.5S4 and does not exceed 2% in CoCr2S4. The compound CuCr1.5Sb0.5S4 and compou nds with Co differ radically in the value of paramagnetic Curie temper ature: theta = -156 K for the former and 45 K less than or equal to th eta less than or equal to 109 K for the latter. The giant magnetoresis tance and the positive value of a are evidence for the existence of af mons in compounds with Co.