[Zurück]

L.A.S. Oliveira, J.P. Sinnecker, R. Grössinger, A. Penton-Madrigal, E. Estévez-Rams:
"Cu induced coercivity enhancement in the low viscosity GdCo_5−xCu_x system";
Journal of Magnetism and Magnetic Materials, 323 (2011), 14; S. 1890 - 1894.

Cu induced coercivity enhancement in the low viscosity GdCo5−xCux system

L.A.S. de Oliveiraa, Corresponding Author Contact Information, E-mail The Corresponding Author, J.P. Sinneckerb, R. Grössingerc, A. Pentón-Madrigald, E. Estévez-Ramse
a Instituto de Física "Gleb Wataghin" Universidade Estadual de Campinas, Barão Geraldo, Campinas, SP, Brasil
b Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud, 150-Urca, 22290-180 Rio de Janeiro, Brasil
c Institute für Festkörperphysik, TU Wien, Wiedner Hauptstr. 8-10, A-1040 Vienna, Austria
d Facultad de Física, Universidad de La Habana, San Lazaro y L. C.P. 10400, C. Habana, Cuba
e Instituto de Ciencia y Tecnología de Materiales (IMRE), Zapata y G, Vedado. CP 10400, C. Habana, Cuba

Received 8 January 2010; revised 24 February 2011; Available online 5 March 2011.
Abstract

We investigate the influence of Cu substitution, on the coercivity and magnetic viscosity, in the ternary system GdCo5−xCux (x=0, 0.5, 1, 1.5, 2 and 2.5) with different field sweep rates. All samples have been studied in the as cast state and crystallize in a single phase CaCu5 structure. With Cu addition, the coercivity was 10 times enhanced for x =1.5. The behavior of the coercivity Hc against field sweep rate, dH/dt, shows that the GdCo5−xCux system exhibits only a small magnetic viscosity effect, a desirable property for magnetic dynamic applications under high magnetic field.

http://dx.doi.org/10.1016/j.jmmm.2011.02.033