Superconductivity and magnetism in the KxMoO2-delta

Author(s)

Alves, L. M. S. ^[1] ; dos Santos, C. A. M. ^[1] ; Benaion, S. S. ^[1] ; Machado, A. J. S. ^[1] ; de Lima, B. S. ^{[2, 1]} ; Neumeier, J. J. ^[2] ; Marques, M. D. R. ^[3] ; Aguiar, J. Albino ^{[3, 4]} ; Mossanek, R. J. O. ^[5] ; Abbate, M. ^[5]

Affiliation

^[1] Univ Sao Paulo, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil

^[2] Montana State Univ, Dept Phys, Bozeman, MT 59717 - USA

^[3] Univ Fed Pernambuco, Dept Fis, BR-50670901 Recife, PE - Brazil

^[4] Univ Fed Pernambuco, Programa Posgrad Ciencia Mat, BR-50670901 Recife, PE - Brazil

^[5] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana - Brazil

• Document type: Journal article
• Source: Journal of Applied Physics; v. 112, n. 7 OCT 1 2012.
• Web of Science Citations: 7

Abstract

Coexistence between superconductivity and magnetism is reported for the KxMoO2-delta samples. Photoemission experiments show that the presence of Mo3+ ions is responsible for the weak ferromagnetic ordering observed in the KxMoO2-delta samples. Magnetic ordering temperature and superconducting critical temperature (T-C) ratio range from 7 to 18 in this compound. These are the highest ratios reported so far for a magnetic superconductor. T-C decreases with increasing potassium composition (x). For the first time, T-C near 10 K is reported in the K-Mo-O system. (C) 2012 American Institute of Physics. {[}http://dx.doi.org/10.1063/1.4757003] (AU)

• FAPESP's process: 09/54001-2 - Acquisition of cryogen-free equipment for the characterization of magnetic properties by vibrating sample magnetometry
• Grantee: Carlos Alberto Moreira dos Santos
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 10/06637-2 - Crystalline structure and physical properties of the anomalous conductor KxMoO2-d
• Grantee: Leandro Marcos Salgado Alves
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 09/14524-6 - Re-liquefier for using in a 9 t MagLab Oxford
• Grantee: Carlos Alberto Moreira dos Santos
• Support Opportunities: Regular Research Grants