Enhanced ferromagnetism in CuO nanowires on the top of CuO nanograins

Author(s)

Souza, J. A. ^[1] ; Criado, D. ^[1] ; Zuniga, A. ^[1] ; Miranda, V. N. ^[1] ; Ramirez, F. E. N. ^[1] ; Masunaga, S. H. ^[2] ; Jardim, R. F. ^[2]

Affiliation

^[1] Univ Fed ABC, Santo Andre, SP - Brazil

^[2] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of Applied Physics; v. 114, n. 17 NOV 7 2013.
• Web of Science Citations: 5

Abstract

CuO nanograins (NGs) and CuO nanowires (NWs) on the top of nanograins samples were produced by the electrical resistive heating method. The NGs sample shows absence of long range magnetic order and strong field-induced ferromagnetic behavior. In the sample comprised of NWs on the top of NGs, a long-ranged antiferromagnetic ordering is induced by a magnetic field of 5 kOe and coexists with an enhanced ferromagnetic-like contribution. The ferromagnetic behavior is observed below and above the temperature-induced T-N suggesting that this behavior is not dependent on the original magnetic state of the system, whether it is paramagnetic (PM) or antiferromagnetic. (c) 2013 AIP Publishing LLC. (AU)

• FAPESP's process: 09/18618-5 - Synthesis and characterization of thermodynamic and electrical transport properties of advanced materials
• Grantee: José Antonio Souza
• Support Opportunities: Regular Research Grants
• FAPESP's process: 10/18364-0 - Physical properties and critical phenomena in strong correlated systems.
• Grantee: Fabian Enrique Nima Ramirez
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/16172-5 - Synthesis and characterization of physical properties of nanosized materials
• Grantee: José Antonio Souza
• Support Opportunities: Regular Research Grants