Autor(es)

Andrade, Margareth ; Maffei, Mariana Lanzoni ; Salgado Alves, Leandro Marcos ; Moreira dos Santos, Carlos Alberto ; Ferreira, Bento ; Sartori, Antonio Fernando

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 15, n. 6, p. 5-pg., 2012-11-01.

Resumo

High quality KMo4O6 single crystals with tetragonal structure (space group P4/mbm) have been prepared by fused salt electrolysis. The crystals were studied by scanning electron microscopy (SEM), X-ray diffractometry, electrical resistivity, and magnetization measurements. X-ray powder diffraction patterns and SEM have given some information on the growth of single crystals. Electrical resistivity as a function of temperature shows that the KMo4O6 compound is a bad metal with resistivity change of approximately 30% in the temperature range from 2 to 300K. A metal-insulator transition (MIT), observed at approximately 110K, has been also confirmed for this material. Magnetization as a function of temperature agrees with previous report, however a magnetic ordering has been observed in M(H) curves in the whole temperature range. (AU)

• Processo FAPESP: 09/54001-2 - EMU: aquisição de equipamento cryo-free para caracterização de propriedades magnéticas por magnetometria de amostra vibrante (VSM)
• Beneficiário: Carlos Alberto Moreira dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 09/14524-6 - Re-liquefatora para uso em MagLab Oxford de 9T
• Beneficiário: Carlos Alberto Moreira dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 10/06637-2 - Estrutura cristalina e propriedades físicas do condutor anômalo KxMoO2-d
• Beneficiário: Leandro Marcos Salgado Alves
• Modalidade de apoio: Bolsas no Brasil - Doutorado