Magnetic properties and the metal–insulator transition in solid solutions

✍ Scribed by O.B. Romanova; L.I. Ryabinkina; V.V. Sokolov; A.Yu. Pichugin; D.A. Velikanov; D.A. Balaev; A.I. Galyas; O.F. Demidenko; G.I. Makovetskii; K.I. Yanushkevich

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 698 KB
• Volume: 150
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/j.ssc.2009.12.042

✦ Synopsis

The structural, magnetic, electrical, and thermoelectric properties of Gd X Mn 1-X S (0.01 ≤ X ≤ 0.3) solid solutions synthesized for the first time on the basis of α-MnS have been studied experimentally in the temperature range 77-1000 K in magnetic fields up to 10 kOe. The synthesized samples are antiferromagnetic semiconductors with an NaCl-type cubic lattice typical of α-MnS. Both concentration (X c = 0.3) and temperature (T c = 450 K) metal-insulator phase transitions have been observed. The concentration metal-insulator transition is accompanied by a decrease in resistivity and thermopower by twelve and two orders of magnitude, respectively, with the change in conductivity from p-type to n-type.